Mossberg 940 jm pro issues

Cookies on the Mossberg Website. We use cookies to help provide you with the best possible online experience. ... 940® Pro. 935 Magnum™ ... 930, 935, 940 : Type: Small Parts: Gauge: 12 Gauge: Prop. 65 Warning for CA Residents » ...

The Hi Viz Comp and Tri Comp are popular front sights and they come with an assortment of attachment screws including a 5-40 (Mossberg standard thread size). The Mossberg factory bead is rather large/tall, not sure the Hi-Viz will really be that much taller unless you place a shim underneath it. Having the vent rib dovetailed (it'll need a ...The complete Mossberg 940 Pro line is now shipping and available in a variety of models and finishes including the JM Pro, Pro Field, Pro Waterfowl (tested), and Pro Snow Goose. The 940 Pro Waterfowl is a joy to shoot and has no problem pushing shells as the birds continue to pile up. (Photo By: Chris Ingram)It’s one of the milder loads out there. But not the mildest, and certainly shouldn’t have an issue on a properly maintained shotgun. Your cycling should be fine. I usually take my hunting guns out for a short round of clays before the season. Should be fun. For $1200 get a 1301 comp. Better gun than a jammaster pro.O.F. Mossberg & Sons, Inc. announced the introduction of a new 12-gauge autoloading shotgun platform; the 940 JM Pro, available in two 10-shot models. January 03, 2020 By G&A Digital Staff. The result of two years of development alongside world champion shooters, Jerry and Lena Miculek, the 940 JM Pro is designed to meet the needs of today’s ...Sep 1, 2014 · Just participated in a local 3-Gun match yesterday, and once again had problems with my Mossberg 930 JM Pro. This time I had two instances of the fired shell failing to extract. The first time, the extractor pulled the brass head off the hull and left the hull in the chamber. I had to stick a rod down the barrel to push the hull out. Go with a winner — the 940 JM Pro. This 12-gauge model has a 3" chamber and a 5-round ammo stock sleeve. It also includes three chokes (CYL, MOD, IC). Get the best bang for your buck when you ...

Series/Collection: 940 JM Pro Action: Semi-Automatic Stock Type: Adjustable LOP, Cast, Drop Magazine Capacity: 9+1 Caliber/Gauge: 12 Ga Sight: Fiber Optic Front Stock Material: Synthetic Barrel Finish: Matte Blue Stock Finish: Digital Camouflage Barrel Length: 24" Chamber Length: 3" Length of Pull: 13" to 14-1/4" Overall Length: 44-3/4" Weight: 7.75 lb Barrel Type: Vent Rib Chokes: Briley Ext SetThe A400 seems like it's one of the best options, but I don't want to spend $2k. In fact, I would like to be under $1000. So with that said, I think I've narrowed it down to the Winchester SX4, Mossberg 940 Pro, or Beretta A300 Ultima. The internet tells me the SX4 doesn't come with shims and the A300 has trigger reset issues.The 940 JM Pro's fatter loading port will help with quad-loading duties for 3-gun competition. This brings us to the upgrade—Mossberg's 940 JM Pro—and the improvements are considerable. Starting at the front, there's a new HiViz front sight with extra light tubes in a variety of colors. The 940 comes with three Briley Acu-Set extended ...The OR3GUN Marine Spacer Tube ™ (MST-930) for Mossberg 930/935 series shotguns is a major enhancement to the reliable function of your firearm in all weather conditions. For years, competition shooters like ourselves have battled seemingly random cycling malfunctions with the gas systems in Mossberg's 930 series.In essence, the 940 JM Pro is a gas-operated semi-automatic that holds 9 plus 1 rounds thanks to its included magazine tube extension. The gas system was redesigned and the internal parts were ...May 18, 2020 · The 940 JM Pro has an extended magazine. It has an oversize bolt and concomitant bolt release. Four different spacers can adjust the length-of-pull over 1.25 inches to better fit the shooter. And ... Mossberg 930 JM Pro Series features fast cycling gas system; ... Mossberg 940 Jm Pro; MOSSBERG 940 JM PRO. 7. MOSSBERG 940 JM PRO. 7. SKU 85111. new. Our Price. $999.99 . Starting at 0% APR or $49 ...Sidearms & Scatterguns Mossberg's New 940 JM Pro. Thread starter Tucker301; Start date Jan 6, 2020; Forums. The Hide Armory. The Armory ... Sidearms & Scatterguns Mossberg 930 issue. Southernspeed; Mar 4, 2024; The Armory ; Replies 17 Views 443. Apr 17, 2024. BAMAboy18. Sidearms & Scatterguns Remington 1187 HD …

In today’s digital age, online advertisements have become an integral part of our internet browsing experience. However, many users find these ads intrusive and disruptive. To comb...Jun 24, 2021 · Here is a video review that I made with Jerry Miculek on the 940 Pro and 940 JM Pro. In short, my first shotgun was a Mossberg 500. Since that first gun I have shot a lot of different shotguns and I have not been to impressed with Mossberg shotguns. The 940 however, impressed me. Here is another video I made with the 940, shooting it super fast. In this video we review the Mossberg 940 JM PRO Shotgun. It is an impressive competition shotgun for sure.Disclaimer: These videos are strictly for education...Experience the rugged reliability of Mossberg Firearms, a trusted name in the industry for over a century. Specializing in shotguns, rifles, and accessories, Mo ... Mossberg 940 Pro Turkey 12GA MO Greenleaf 24" BBl ... Mossberg. 940 JM PRO SYN 12GA 3" 24" 5+1 C$1,349.99 C$1,349.99 Mossberg. Mossberg Flex Conversion Kit 12 GA #96022 C$109.99 C ...Jan 30, 2015. 13,326. Harford County. I though Jerry worked all his magic on the 930 JM Pro. The only big change I really see is the redesigned gas system. Honestly, I guess I haven't put enough rounds through my 930 to run into fouling issues. I've cleaned it a few times, but only because it got wet. The 930 loading port was already opened up ...

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This keeps cleaning to a minimum, allowing the gun to run more rounds without issue between cleanings. Mossberg itself put 1,500 rounds through the 940 JM Pro without experiencing issues. As far ...These 940 JM Pro autoloaders were built to compete and win. Inside, you will find a new durable gas system that allows for up to 1500 rounds between cleaning, nickel boron-coated internal parts for smooth operation, and a competition-level loading port, elevator, and follower. Outside, an adjustable stock and streamlined forend sport Mossberg signature texturing, while a host of stylized ...The new design of the 940 competition-ready loading port and several related components is the most aggressive factory offering available to speed reloads. Lena demonstrated that the 940 JM PRO design could be quad loaded in the fashion used by many 3-gun competitors. That’s holding 4 shells in your hand and feeding them in two at …Mossberg 930 JM Pro Series features fast cycling gas system; ... Mossberg 940 Jm Pro; MOSSBERG 940 JM PRO. 7. MOSSBERG 940 JM PRO. 7. SKU 85111. new. Our Price. $999.99 In stock. Starting at 0% ...

Mossberg 940 JM Pro. Mossberg JM Pro 940 autoloaders were built to compete and win. Inside, you will find a new durable gas system that allows for up to 1500 rounds between cleaning, nickel boron-coated internal parts for smooth operation, and a competition-level loading port, elevator, and follower. Outside, an adjustable stock and streamlined ...This is the piston from the 940 Pro Tactical: This is the piston as shown in the 940 Pro Owner's Manual, both for the Pro and Pro Tactical: Pro: Pro Tactical. I contacted Mossberg support and the rep told me that the housing for the piston has two reliefs cut in it to allow the gas to escape and run cleaner. All of the photos online as well as ...The 940 Pro and 940 JM Pro come in between $900-$1,000. Quick Specs. All 12 gauge, All 3 inch. All gas driven. 28" Barrell EXCEPT the JM Pro is 24". All come in around 7 pounds. Length of Pull adjustable from 13" to 14 1/4". Comb and Heel are also fully adjustable. All run the Accuchoke system.If you own a Honeywell Home Pro Series, it’s important to familiarize yourself with the user manual. The manual provides detailed instructions on how to set up and operate your dev...The Mossberg 940 JM Pro Enhanced Charging Handle is much larger than the factory Mossberg 940 JM PRO Charging Handle, providing a more positive method of charging, in all shooting situations. Heavy knurling reduces the chance of your fingers or hand slipping off the charging handle during stress fire situations, when wet, or when wearing gloves.To help you further understand the value of a MOSSBERG MODEL 940 JM PRO, we provide a breakdown based on the firearm's condition: 100% (New, unfired): 850 Login / Register to view pricing. 98% (Like new, minor wear): 750 Login / Register to view pricing. 95% (Minimal wear, well-maintained): 650 Login / Register to view pricingInstall the rear sight as far back on the rib while still having even pressure on the rear mount plate. Use good locktite on the 4 rear base screws. The rear is adjustable up/down via one screw that with tension screws in or out to raise/lower rear sight. The front sight is 2 colors green outside and red middle.O.F. Mossberg & Sons, Inc., a leading American firearms manufacturer, was honored with the 2020 Caliber Award in the "Best New Shotgun" category for the company's 940 JM Pro competition shotgun. Presented virtually on October 20, 2020, by NASGW (National Association of Sporting Goods Wholesalers) and POMA (Professional Outdoor Media ...Mossberg Model 940 JM (Jerry Miculek) Pro Series 12 GA. Item : 85111. SKU : 85111. Model : 940. UPC : 015813851114. $1,019.00 $888.05 Make Offer %local_inventory_count% Free Shipping! ... Mossberg 930 JM Pro Series features fast cycling gas system; beveled loading gate for faster reloading, Pro-Series Engraving, special corrosion resistant ...

The gas-operated Model 940 uses a short-stroke system, and its gas piston surrounds the magazine tube. On the JM Pro, there is a perforated cylinder between the piston and pusher assembly. Magazine capacity with the extended tube is nine 2 3/4″ shotshells. Instead of a brass bead, the top rib wears a Hi-Viz triangular front sight.

Mossberg’s newest, and perhaps best, turkey gun is the 940 Pro Turkey, which is an extension of the JM 940 Pro line that the company introduced back in 2020 with the help of iconic competition shooter Jerry Miculek. There now are field, waterfowl, and tactical variants of the 940 as well. The Pro Turkey gun has some clever features that ...The 102-year-old O.F. Mossberg company is known for its venerable pump-action shotguns. (The Model 500 alone has sold over 12 million units, likely making it the world’s most popular long gun, period.) But the “Mossberg makes good pumps” perception is changing. The perfect illustration of that is the Mossberg 940 JM Pro.The Top Gun for 3-Gun - Now Comes Optic-Ready. Patent-pending receiver cuts and a removeable cover plate allow direct mounting of Shield RMSc-pattern micro dot sights, for improved eye alignment and faster target aquisiton. Inside every 940 JM Pro, you will also find a new durable gas system, specially-coated or finished internal parts for smooth operation, and a competition-level loading port ...O.F. Mossberg & Sons, Inc. announced the introduction of a new 12-gauge autoloading shotgun platform; the 940 JM Pro, available in two 10-shot models. January 03, 2020 By G&A Digital Staff. The result of two years of development alongside world champion shooters, Jerry and Lena Miculek, the 940 JM Pro is designed to meet the needs of today’s ...I had the same problem with a Mossberg 930. I would love to tell you that I am a gun genius, disassembled, immediately located the problem, and repaired. Not the case. No idea what was causing the issue. My guess was trash in the trigger group and it just needed to be shot. Took it apart, cleaned it well. Put 100 rounds through it.All 940 Pro Waterfowl shotguns now come optic-ready, with patent-pending receiver cuts that accept direct mounting of Shield RMSc-pattern micro dot sights, for improved eye alignment and target aquisition.Inside, you will find a host of corrosion-resistant internal parts—including a boron-nitride coated gas piston, magazine tube, and hammer and sear— for improved performance in the blind ...What are some common adolescent health issues? Learn about common adolescent health issues from this article. Advertisement According to the Centers for Disease Control and Prevent...

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Jun 22, 2015. #2. Get 'em through Mossberg. I ordered a set about two years ago but I don't remember the part numbers. I believe it was just a standard 930 mag cap and spring. Don't forget to put a plug in it to limit it to three rounds, chamber and mag combined.Looking for reviews from mossberg 940 owners (any 940 model). Is it really an unreliable “jam” pro like some people say it is? ... I have the 940 jm pro. It cycles light target loads like a champ, no problems after about 500 rounds. Earlier on I tried some federal 00 buck and it jammed twice in the first 50rd. Cleaning and maintenance is ...Mossberg 940 JM Pro . New gun owner and just purchased 940JM Pro. A buddy at work suggested getting a pistol grip stock for better control will firing. ... How is the 940 looking at there waterfowl guns heard lots of issues tho Reply reply -GEFEGUY • ...If you’re a homeowner, chances are you have some appliances from the renowned brand Kenmore. Known for their reliability and durability, Kenmore appliances are trusted by millions ...Mossberg 940 JM Pro Sunday gun show pick up, shot 250 rounds yesterday through the Mossberg 940 JM Pro including a mix of 000 and slugs. The POA/POI between the bead and the RDS is very different so I think I'm going to remove the bead as the POI is high left compared to the zeroed red dot sight. The barrel clamp moved significantly during the ...Buuuuut, while mossberg denies any issues, some folks on the internet have been bashing its reliability. Does anyone on here own one? Or even better, shoot lots of …Oct 2, 2023. #26. Recently, I was able to track down a new Mossberg 940 Pro Tactical and Remington V3 Tactical to purchase for HD and range use: These will be stripped down and lubed up before I hit the range with them for a break-in w/ 00 buck, slugs, and even the cheap-o "Brand-X" birdshot).This one's been discussed a bit; someone on BE gave me the heads up, on using a Ruger 10/22 spring to replace the Mossberg 930 hammer spring. Some JMs/930s exhibit a light strike at some point, with this spring being a slightly stronger, longer, thinner replacement. I've had few issues with my JM... ….

2065 posts · Joined 2004. #26 · Feb 7, 2023. I'm NOT passing judgement on pistol grips (with full shoulder stocks) but it seems popular opinion has determined almost everything needs a pistol grip on it. A lot of this is simply due to the movement away from sporting/hunting opinions about firearms and to that of a more 'defensive' position ...Cookies on the Mossberg Website. We use cookies to help provide you with the best possible online experience. ... #85144 940 JM Pro Optic-Ready 5-Shot . $1,274.00. Compare. Gauge: 12 Gauge ; Barrel Length: 24" Capacity: 4+1 ; New #62230 835 Ulti-Mag Turkey - Holosun Micro Dot ...It's one of the milder loads out there. But not the mildest, and certainly shouldn't have an issue on a properly maintained shotgun. Your cycling should be fine. I usually take my hunting guns out for a short round of clays before the season. Should be fun. For $1200 get a 1301 comp. Better gun than a jammaster pro.Jan 30, 2024. #1. All, I consider myself lucky enough to have obtained a Mossberg 940 JM PRO here in CA. They are scarce (like proverbial hen's teeth) here. This is the the model that is 9 (+1) for a total of 10 ready to go. Will do some range testing soon and report the results. I had to contact Mossberg for the missing choke tubes and manual ...Online Firearm Orders. Select firearms are able to be ordered online and shipped to your local Cabela's! More Info. An optics-ready tactical autoloader with a Holosun® HS407K Micro Dot sight, the Mossberg® 940 Pro Tactical Semi-Auto Shotgun with Holosun Micro Dot Sight combines stopping power with fast target acquisition.655 posts · Joined 2012. #3 · Sep 2, 2021 (Edited) If you are determined to get a Mossberg, why not the 930 PRO-SERIES SPORTING instead of the 940. It has a wood stock that would be much easier to add an adjustable comb to if needed. Problem with synthetic stocks is that most of them are hollow, so as noted above, you would have to fill it ...They also cost three times as much. The new 940 JM Pro actually made an effort to improve this, and that gun can go longer between cleanings. Handling It. This specific model has the traditional shotgun style stock, and when it comes to Mossberg’s, this is the right stock to go with.Mossberg 940 JM Pro autoloaders were built to compete and win. Inside, you will find a new durable gas system that allows for up to 1500 rounds between cleaning, nickel boron-coated internal parts ...In 2020 Mossberg unveiled its 940 JM Pro, a semi-auto competition shotgun designed by likely the best all-around shooter in history, Jerry Miculek. It’s a gun conceived to compete with the best gas-action semi-autos available, yet thanks to Mossberg’s well-oiled production line and sheer sales volume, the 940 is priced significantly less. Mossberg 940 jm pro issues, If the 940 JM Pro, like all extended magazine shotguns, has one weak link, this is it. You see, a nine-round magazine requires a thin spring approximately 34" long. Springs eventually weaken..., I have had both a 940 tactical and a 930 tactical, and gave up completely on Mossberg auto loader shotguns. If you want one for bear protection, or any other application where you need reliability, get a Beretta 1301., Top 5 Mossberg 940 JM PRO Problems Problems & Solutions. 1. Jamming Issues. Alright, let's kick things off with the jamming issue. When I took this shotgun out to the field, it was all fun and games until a jam. The bolt wouldn't return to its starting position, making it impossible to fire another round., Please open a ticket to report this issue. Share InterstellarSK. Idaho Falls, ID. Messages 6 Reactions 4. Mar 2, 2024 #1 Ad Type. For Sale; Price $850 Manufacturer Mossberg Caliber 12 Gauge City Idaho Falls State Idaho Zip Code 83401. I have a JM 940 pro that I purchased in 2021. I have shot it maybe 5 times with a box of 25 or 50 each time ..., Whether you like Hunting, Skeet, Clay Pigeon, Home Defense or anything that involves a Shotgun Welcome to /r/Shotguns. Mossberg 940 PRO Tactical issues. I recently got a 940 PRO ran over 120 mostly 00 and slugs without a single hiccup. The one issue I encountered was with the magazine capacity, the tube only holds 4 shells at a time. , #1. I have had more issues with this 940 pro. Maybe it's time to trade it in and cut my losses, but I just keep coming back for more with this thing. Today I had …, 940 Pro Tactical. #85152. $1,225.00. Select up to 3 models to compare Compare up to 2 models. Cancel. Compare Details. Close. You have no items to compare. 940 Pro Tactical comes optic-ready, with receiver cuts that accept low-profile direct mounting of Shield RMSc-pattern micro dot sights— for improved eye alignment and target acquisition., These 940 JM Pro autoloaders were built to compete and win. Inside, you will find a new durable gas system that allows for up to 1500 rounds between cleaning, nickel boron-coated internal parts for smooth operation, and a competition-level loading port, elevator, and follower. Outside, an adjustable stock and streamlined forend sport Mossberg signature texturing, while a host of stylized ..., environmental issues of the twin cities. The Institutional Context Health, and especially environmental, problems are a relatively new concern of federal governments for both the United States and Mexico, although disease and sanitation have long been a primary concern of local officials. The Mexican Constitution of, May 22, 2020 · Unveiled just weeks before SHOT Show 2020, O.F. Mossberg & Sons Inc., came to market with its 940 JM Pro, a 12-ga. shotgun designed to suit the needs of today’s competition shooters.In fact, the ... , MOSSBERG. 500 TACTICAL. NEW. $658.99. Targeting hunters who thrive on high-volume shooting and dream of an unlimited round count to take on clouds of show geese, the 12-gauge Mossberg 940 Pro Snow ..., Mossberg 930 JM Pro Series features fast cycling gas system; ... Mossberg 940 Jm Pro; MOSSBERG 940 JM PRO. 7. MOSSBERG 940 JM PRO. 7. SKU 85111. new. Our Price. $999.99 In stock. Starting at 0% ..., , The mossberg 930 jm pro may experience certain problems with cycling ammunition. This article discusses common issues and solutions for mossberg 930 jm pro problems. The mossberg 930 jm pro shotgun is a popular choice among competitive shooters and enthusiasts. However, like any firearm, it can encounter problems that …, May 18, 2020 · The 940 JM Pro has an extended magazine. It has an oversize bolt and concomitant bolt release. Four different spacers can adjust the length-of-pull over 1.25 inches to better fit the shooter. And ... , The 930's gas system is a bit too tightly tuned for race gun work. The left side of the Mossberg 940 JM Pro. It needs to be cleaned about every 600 rounds. That's …, 015813851435 85143 Mossberg 940 JM Pro 5-Shot CALIFORNIA LEGAL - 12ga. ... Designed in conjunction with World Champion shooter Jerry Miculek, the new 940 JM Pro is feature-rich, fast-cycling, and ultra-competitive. Competition-Ready Features. These 940 JM Pro autoloaders were built to compete and win. Inside, you will find a new durable gas ..., 1. The trigger assembly and the bolt both need a good soaking in solvent, then a light lubrication afterward. 2. The firing pin return spring could be broken (or dirty). If broken, it needs replaced. Or, the firing pin itself could be corroded at the tip and might need replaced although I doubt it. 3., November 14, 2022 By Eric R. Poole. Mossberg’s 940 Pro Field is one of the models that evolved from the 2020 introduction of the 940 JM Pro. Designed in partnership with World Champion Jerry Miculek, the new 940 is a fast-cycling shotgun built to win competitions. The 940 gas system is a new design to speed up cycling and make it more reliable., Inside every 940 JM Pro, you will also find a new durable gas system, specially-coated or finished internal parts for smooth operation, and a competition-level loading port, elevator, and follower. Outside, a user-adjustable stock and streamlined forend sport Mossberg signature texturing, while a host of stylized, functional components combine ..., Mossberg teamed up with renowned competitive shooters Jerry and Lena Miculek, which led to the 2020 launch of a new 12-gauge autoloading shotgun for competitive shooters—the 940 JM Pro. Mossberg saw the opportunity to transfer the technology of its new competitive-style platform to shotguns geared for hunters, which spawned the 940 Pro ..., 940 Pro Turkey. 5-Shot. 12 Gauge. Updated, cleaner running gas vent system for reliable cycling. Self-draining stock; adjustable for length-of-pull and Drop at Comb/Heel. Enlarged, beveled loading port with a quick-empty magazine release button for easy unloading. Drilled & tapped Receivers. Select up to 3 models to compare Compare up to 2 models. , The spring I recieved is marked "940 JM Pro". Yup, it's 37". I (eventually) got the new spring situated and proceeded to load the mag with 2 3/4 00 Federal - 5 rounds. ... I had to send my shotgun back to Mossberg though because I ran into issues with the blemish and the bolt release wouldn't work to unload the shotgun properly. I guess I'll ..., If you've picked up a 940, you have a 930 with Mossberg-made OR3Gun parts and a modified SBE Precision piston. Necessary work: Polish inside the action spring tube. De-burr the action spring. Polish inside the mag tube. Polish the mag tube extension and chamfer the mouth where it transitions to the tube., O.F. MOSSBERG & SONS, INC. P.O. BOX 497 • 7 GRASSO AVENUE, NORTH HAVEN, CONNECTICUT 06473 PHONE (800) 363-3555 www.mossberg.com Safety and safe firearms handling is everyone's responsibility. OWNERS MANUAL 940TM AUTOLOADING SHOTGUN PART NO. 104871 REV. A 104871 940 Autoloading Owners Manual 05/26/21 11:23 AM Page 1, Mar 26, 2020 · The 930jm pro seemed to be a dud with far too many reported reliability issues. If this one proves to be a solid performer, I'll be in the market. My Beretta 1201FP has never failed to fire, eject, or load. Granted, it's a recoil-operated system, and the 940 is gas-operated. , Nov 21, 2020 · Update: 940 jm pro came back from the factory after cycling issues. Now! With trigger and safety issues! Mossberg factory replaced my piston, elevator, and o... , I had the same problem with a Mossberg 930. I would love to tell you that I am a gun genius, disassembled, immediately located the problem, and repaired. Not the case. No idea what was causing the issue. My guess was trash in the trigger group and it just needed to be shot. Took it apart, cleaned it well. Put 100 rounds through it., The 940 JM Pro comes equipped with Mossberg’s Accu-Choke™ system, and ships with a set of Briley extended chokes (Cylinder, Improved Cylinder, and Modified) that come engraved with constriction for easy selection. In addition to the Pro, Mossberg now has for a Field and a Waterfowl model of the 940 Pro. The JM Pro has an MSRP of $1,157.00., The gas-operated Model 940 uses a short-stroke system, and its gas piston surrounds the magazine tube. On the JM Pro, there is a perforated cylinder between the piston and pusher assembly. Magazine capacity with the extended tube is nine 2 3/4″ shotshells. Instead of a brass bead, the top rib wears a Hi-Viz triangular front sight., The Mossberg 940 JM has a large knurled bolt handle and bolt release button for smooth operation. The 24" barrel and assembly are machined from steel, then threaded for ACCU-chokes to provide greater diversity at a wide range of shooting distances. Should the Mossberg 940 JM ever require service, it is backed by a 10- year manufacturer's warranty., 940 Pro Turkey. 5-Shot. 12 Gauge. Updated, cleaner running gas vent system for reliable cycling. Self-draining stock; adjustable for length-of-pull and Drop at Comb/Heel. Enlarged, beveled loading port with a quick-empty magazine release button for easy unloading. Drilled & tapped Receivers. Select up to 3 models to compare Compare up to 2 models., Looking for reviews from mossberg 940 owners (any 940 model). Is it really an unreliable “jam” pro like some people say it is? ... I have the 940 jm pro. It cycles light target loads like a champ, no problems after about 500 rounds. Earlier on I tried some federal 00 buck and it jammed twice in the first 50rd. Cleaning and maintenance is ...