AAR SLR15 Law Enforcement Shotgun Armorer Course, Douglas WY

#1
SLR15 LAW ENFORCEMENT SHOTGUN ARMORER COURSE

When: December 10-11, 2020

Where: Wyoming Law Enforcement Academy in Douglas, Wyoming.

We conducted a 2-day (16-hour) Law Enforcement Shotgun Armorer Course that was hosted by the Wyoming Law Enforcement Academy. We have been teaching here for 2 decades, and we look forward to future classes. The training offered plenty of table space, decent lighting, and a large screen with projector so we could show lots of animated graphics of the weapons system and powerpoint of detailed pics of gun parts, especially when looking at finer detail things like machining, stress cracks & wear.

This course covers the Remington 870, Mossberg 500/590, and Benelli M1-90/M2 type shotguns.

This class was a mix of Law Enforcement Officers from Wyoming and Colorado.

The shotguns present in this course were a mix of Remington 870's and Mossberg 500/590's.

Officers bring shotguns to work on, and we always recommend that Officers bring shotguns that are not working correctly or broken, as we look at this as a learning opportunity to figure out what is not working correctly, and Officers can make repairs onsite to get them back into working condition.

We started with an introduction of all present. Everyone was supplied with a course manual, inspection forms, and supplier lists of where to obtain parts, tools and accessories. We supplied every student with their own set of basic tools that are necessary to do most of the general work on the shotguns. Everyone was introduced and supplied with Slip2000 "EWL" Extreme Weapons Lubricant and #725 Cleaner Degreaser.

We showed our procedure of a series of checks that we use to make sure everything is working correctly, and why we use this series of checks. Everyone was taught a hands on session of the eight cycles of function on the shotguns. From there we broke the same eight cycles down further in greater detail.

We went through the proper way to remove barrels from each type of shotgun. With the barrels removed, they were inspected, in this class I think every barrel was heavily fouled. The fouling inside the barrel is generally plastic from the shot wadding, mixed with powder and shot residue. Everyone was shown that they needed to clean the chamber and bore, as these are different diameters and require different brushes. They were also shown all the other hidden areas of the barrel that need to be kept clean for proper functioning of the bolt assembly and barrel to receiver fit for lock up etc. Also shown were a multitude of tools, brushes, and jags for cleaning the barrel. Everyone with fouled barrels were allowed to clean them, as a hands on session of trying the different methods and tools shows what works better. Everyone was supplied with Slip2000 #725 Cleaner/Degreaser, Slip2000 Piston Parts & Choke Tube Cleaner, which help to cut through the fouling rather quickly. After a short session of barrel cleaning, the fouling was removed.

This class seemed to have a lot of heavily fouled barrels. Nobody had heard of a shotgun chamber brush. Everyone took advantage of all the different brushes, jags, solvents, patches, etc, that we provided, and put them to good use. Everyone got a hands on use of seeing how the different Slip2000 solvents work, especially 725 Cleaner/Degreaser and Choke Tube Cleaner. The Slip2000 Choke Tube Cleaner is great stuff, we use it on shotgun barrels, along with any gun barrels that get used for Simunitions, Force on Force, or UTM type ammunition where plastic fouling may occur.

Barrels were inspected for damage, stress, missing parts etc. We also showed the differences between old and new styles of Remington 870 retaining cap designs, and showed why these shouldn't be intermixed, and when I mentioned that barrels could come loose and fly off during shooting, of which several of those present had experienced this first hand and didn't know why.

Next we showed how to remove the bolt assemblies from each of the different weapon systems. Everyone learned that the Mossberg system is more involved when compared to the Remington. We showed how the bolts assemblies, slides, action bar assemblies, integrate together.

Bolts were disassembled and reassembled, and inspections were done, showing where debris and corrosion is found, and why we recommend that certain things be inspected and cleaned on a regular basis. Armorers were introduced to splined pins, and shown the proper way to remove and install them. The 870's were inspected for old versus new parts, the difference in era's of 870 parts, and shown a hands on difference of forged vs MIM (metal injection molded) parts and why we recommend using the forged parts on police 870's. The 590 bolts were disassembled, and people were shown the changes in eras of these parts, and that there is a difference in the right & left extractor assemblies and why.

Note: One of the Remington 870's was found to have a broken firing pin spring. This is something we come across once in a while. In class we show several pics of broken ones that we have come across, and you can visually see when they broken, as the broken coils will wind themselves into each other, and we have seen this cause fail to fires when things get bound up. This is something that should be checked by Armorers on a regular basis.

Magazine tubes and their internals were gone through. When we allow people to clean the magazine tubes using a magazine tube brush, it’s always amazing to see how much crud comes out, and IMHO the magazine tube should be scrubbed clean of debris on a regular basis. Magazine springs were covered, and there were a few students that had sporting shotgun springs, of which were replaced with heavier springs. Students were also shown why we recommend tactical magazine tube followers over the stock cup shaped ones. No magazine tubes were found to be bent or damaged, but we covered repair and replacement.

Day-2 started with a review of day-1. We then moved into forend assembles, stocks receivers and trigger groups. Forend assemblies (action bar assemblies) were taken apart using the proper wrenches, then the forends were inspected, action bars inspected, and things were reassembled and indexed correctly. It was shown how the action bars have a timing that controls the shell latches, and if the action bars are damaged or bent that the timing could be off. We also showed variations and evolution changes in the forends.

Several of the shotguns present in this class had loose forends. Loose forends can cause things to go out of proper alignment, resulting in cycling issues. These cycling issues are generally feeding related where no shells or multiple shells were coming out of the magazine tube. Once everyone properly indexed and tightened the action bars and forend assemblies down, all of these shotguns worked properly. We recommend that Armorers have a good forend wrench, this way they can tighten or realign any forend that may need attention.

We removed the buttstocks. Once removed, we showed the different bolts and washers that are used. Stocks were inspected for cracks, and all made sure they had stock bearing plates and were shown their importance. We went through stock repair on wood and synthetic stocks, to include alterations. Receivers were inspected where stocks mount to, and replacement and repair was covered.

Note: One agency in this class had Knox/Blackhawk recoil reducing stocks Gen-II that had been changed out on their guns. These were the type that require a key tool to be able to remove and install. This agency didn't have the key tool. We see this on a regular basis where someone installed the stock systems with the included tool, but then discard the tool, not realizing that sometimes the tool is needed to get the stock off so the trigger group can be removed. Luckily we have an extra one of the tools with us. Also to note: the newer versions of this stock system was redesigned so you do not need the key tool.

We then moved into trigger groups, starting with the Remington 870, followed by the Mossberg. Everyone was shown how the entire trigger groups work, what can be disassembled and what cannot due to availability of parts, inspections, maintenance, mechanical safeties, changes in designs, Police/Military models vs sporting models, and how the carrier integrates during cycling. We also showed common mistakes that people make with trigger groups, the problems in function, and how to correct any issues. After trigger groups were put back together, we showed how the carriers integrate, how the slides with action bars work, and how/why the lock forward cycle works.

Shell Latches on the Remington 870's is where we went next on the weapons system. We covered proper staking and why, how they get damaged or misaligned, and their replacement. We showed multiple different types of tools for aligning and staking shell latches.

Note: One Officer found a loose shell latch that fell out when he removed his trigger group. This was reinstalled and staked back into its track.

The next thing we covered was the ejector systems. We showed the 4 piece system of the Remington 870, and the 2 piece system of the Mossberg. We covered how these are replaced, tuned, and proper inspections, showing several variations of tools and methods of how to perform repair & replacement.

The end of the day was a review, followed by all shotguns being reassembled, then inspected and gauged to make sure everything was in spec and ready to go back into service.

Here is a brief overview of what is covered:
Headspace and wear inspections
Action and function
Barrel inspections
Fore-end assembly & action bars
Bolt assembly (extraction & spring, firing pin, retractor spring, flexitab cuts)
Ejector inspection, repair & replacement
Slide assembly inspection
Stem adjustments
Hook Space
Magazine spring, retainer & followers
Shell latches, inspections, adjustment & replacement
Custom accessories & enhancements
Maintenance


CY6
Greg Sullivan "Sully"
SLR15 Rifles
TheDefensiveEdge.com
(763) 712-0123