OR3GUN™ Competition Components for Mossberg® 940 Series

It's no secret to 3-Gunners that the OR3GUN line of competition 930 parts served as inpiration for Mossberg's 940 JM Pro. While the 940 is a vast improvement over a factory 930, there is still some room for enhancements to be made when compared to a full 'OR3GUN Ready' 930. We started with the overlooked recoil system and have created a 940 specific Competition Spring Plunger and Quick-Adjust Spring Retainer set. We have also introduced an Enhanced Bolt Release specific to the 940. Read through our evolving 940 page below for details on more products for this new platform!

Natural Habitat	Application	Features	Color	Price	Status	ORDER
	Competition ASR/CSP (940) 3-Gun Trap/Skeet	Anodized (w/ Radiused Tails) 2-Position (Quick Change) Matched Set (940 Specific)	Anodized OR3GUN Gold Dust	$54.95	In Stock
	Port Combo (940) 3-Gun Trap/Skeet	940 Retainer ECF Follower 940 Button	Anodized OR3GUN Ice Storm	$109.95	Low Stock
	Port Combo (940) Hunting Trap/Skeet	940 Retainer Field Follower 940 Button	Anodized Mixed Damp Earth Red Cinder	$109.95	Low Stock
	Port Combo (940) 3-Gun Trap/Skeet	940 Retainer ECF Follower 940 Button	Anodized Mixed Marine Blue Pitch Black	$109.95	In Stock
	Competition Combo (940) 3-Gun Trap/Skeet	940 Retainer ECF Follower CSP/ASR Set 940 Button	Anodized Mixed Marine Blue Gold Dust	$159.95	In Stock
	Multi-Use Combo (940) 3-Gun Trap/Skeet	940 Retainer ECF Follower CSP/ASR Set 940 Button	Anodized Mixed Storm Gray Gold Dust	$159.95	In Stock

While several internal upgrades were made with the introduction of the 940, one of the most critical was left on the table. Hidden inside your 940 return spring tube is the same design and (exact spring) that caused issues with the 930 at higher round counts. (Since this is the same issue, see our 930 CSP page for complete details.) As the 930 has the same recoil system issues as the 930, including the sharp spring burr that eats away at the plunger, we have produced a version of our captured tail plunger specific to the 940. The familiar, sharp spring burr was found to be present on ALL 4 of the 940 JM PRO series guns we got in for prototyping and evaluation. They were sourced from different distributors and were hundreds of serial numbers apart. There have also been numerous reports of issues with 1200 FPS loads cycling reliably after the round count builds on OEM recoil system parts. After our own extensive testing, evaluation and prototyping we put our ASR/CSP solution for the 940 into production. (Please note, the 940 ASR/CSP components are NOT the same dimensions as the 930 versions. They are NOT compatible with each other!)

We have created a CSP/ASR package that should allow you to run bulk loads without issue in an otherwise 'healthy' 940. Just make sure you address that spring burr while you are in there to install your ASR/CSP set as this is still a concern carried over from the 930 models. The ASR/CSP for the 940 lowers the spring pre-load around 7% to improve cycling of lighter loads. The heavier position on the Quick Change ASR is tuned for full power 3" magnum loads. For most 3-Gun purposes, the lighter position will be suitable for light birdshot through standard buck/slug loads. Our CSP is a bit lighter in overall weight than the factory part as well as having the self-cleaning characteristics of our Field CSP found in our 930 parts section. The ASR is the 2-Position, Quick Change version also pioneered in our 930 parts line.

Many were reportedly surprised to find the external 'gold' accents on Mossberg's first few thousand shipping units were more of a 'matte mustard' than 'gold' compared to the internal spacer tube. Others simply desired a different color scheme than the first available 940 model. Incidentally, sales of our original Universal Bolt Release in Pitch Black more than tripled once the 940 started trickling out of the factory.

We have since developed a 940 specific version of our 'Tactile' Enhanced Bolt Release. This part encompasses the best features of all OR3GUN buttons for secure factory screw mounting with our aggressive, stylish texture and over-travel stop feature. This was designed specifically for 3-Gun and other competition purposes. NOTE: Some 940 models from late 2022 forward feature an off-set, plastic bolt button from the factory. These are mounted over 1 of 3 different shell stop variations from Mossberg. Some of these are keyed with a notch or a raised rib. These are NOT fully compatible with the OR3GUN 940 bolt button. If your 940 has an off-set, plastic bolt release you may not be able to use your included OR3GUN button without modification.

We've also worked with our anodizers to come up with a similar color that renders a much smoother looking, yet complementary glossy gold finish we call Gold Dust for some of our 930 and 940 parts going forward. This OR3GUN Gold Dust color is also standard on our 940 internals. As additional 940 models are released, our external color options from the 930 line will be adopted. Our Damp Earth anodizing is a great fit with the Prairie camo found on the new 940 Waterfowl model.

Many have already chosen the 930 Oversized Charging Handle or Nordic's version when changing color schemes. As you can see, simply separating the aluminum piece and replacing it will not be a feasible option as it is pressed, not screwed on to the host steel piece. With other products for the 930/935 suitable for the task, we aren't making this component a focus at this point.

The 940 loading port is actually opened less forward than it appears at first glance. Our Enhanced Competition Follower is installed in both guns below to show the extent of the port work when compared to the same fixed point of receiver/shell stop/magazine tube relationship. The 940's polymer forearm retainer incorporates an extended receiver ramp/cap. It works great for traditional loading from caddies, less so for Twins. Quads? Not a great set-up. The cap and resulting overlap is necessary for loading comfort, based on the factory cut to the loading port creating a pretty sharp transition as you will see below.

The above picture shows our older 930 Snow Goose project (from Facebook) with a conservative loading port for old-school caddy loading. The 940 forearm retainer is removed to show the base receiver cut, which includes a pretty abrupt edge at the end of the port. Quad loaders are going to want to do additional work to the port for smoother loading. As you can see, the side of the receiver cut on the 940 is more aggressive, but the overlapping OEM forearm retainer is more intrusive than our ramped CFR for the 930. We have been running a solution in-house for a while that is now in production. The comparison below shows a 3d printed prototype against the profile of the OEM retainer. Machined from a solid piece of 6061 alloy, the new OR3GUN Competition Forearm Retainer for the 940 is the perfect companion to your loading port modifications. NOTE: Ongoing production changes at Mossberg have created issues with our 940 Forearm Retainers on some guns. A batch of gas system spring and pusher assembly combinations in some early 2023 production 940s can result in the spring binding as the gun cycles. The binding kicks the spring end under the next coil of the compressing spring. This shows up as contact damage to the OR3GUN 940 Forearm Retainer, while making only minor wear marks on the factory polymer part. The binding can be felt when manually cycling the internal pusher assembly with the forearm removed. The spring (and part number) is carried over from the 930, so there are an unknown number of combinations that are affected. Be mindful of the issue on newer production 940s and check your install for proper cycling and clearance before running many rounds. Also, be sure that you don't force the spring end past the second coil on assembly as this is also a possibility. It is also critical to keep your magazine nut tight to prevent play in the barrel/receiver fitment that causes misalignment of the cycling components. Additionally, don't go overboard when deburring your gas system spring ends, as this makes it easier for the spring end to slip past the next coil during assembly or cycling. Should damage to the OR3GUN Forearm Retainer occur, it can be filed and/or polished smooth and your 940 should continue to operate properly with a new gas system spring.

We mentioned 940's loading port cut appearing deeper cut than it actually is. In addition to the forearm retainer ramp/cap on the 940, the follower itself lends to the illusion of an aggressively opened port. The 940's OEM follower itself has a faux seating point that makes the profile of the follower protrude as though the port is cut deeper. Our existing line of 930 followers works perfectly on the 940, so your choice of competition color scheme can be accomplished with existing parts on the market from OR3GUN and others. We have begun offering these in Combo form, based upon the popularity of our 930 parts line.

Again, stay tuned to this page. We have several parts in various levels of prototyping and production for the 940. You've seen what we could do with the 930, so imagine what we have in store for the 940!