In this post we're going to go off on a tangent from what you've normally seen here. This little side project is the restoration and customization of a Crosman 2240 air pistol. This is the newer generation version of this gun but this gun is still several years old nonetheless. The seal on the power valve where the CO2 cartridge was degraded to the point that it would not allow for gas to come out, its like it turned into mush.
The Crosman 2240 is a .22 caliber CO2 pistol that is a single shot bolt action gun that shoots around 450 fps give or take. This gun is also one of the platforms that's more customized than other guns you may be familiar with. Well since I had one I figured, why not, I'll customize this gun to make it something that's more entertaining. One of the first things I wanted to add to this gun was a suppressor made specifically for this gun. I picked up a unit off Amazon that's carbon fiber and approximately 8" long. Contrary to what people think, airgun suppressors are legal as long as they can't be made to work on a firearm. This suppressor is made specifically to fit over the barrel of the 2240 and uses a set screw to hold the unit to the flat point on the muzzle of the gun, again, not easily adaptable to a firearm. Another modification I wanted to do was change the lower receiver of the gun around to accommodate an AR15 pistol grip. This is mainly a cosmetic modification but I do like guns that look cool as well as shoot cool. The lower receiver I picked up was an aftermarket plastic piece made on a 3D printer by a customizer. It was made heavy duty enough that it will be able to take normal use. Of course you can't throw it around or drop it on the ground but it's pretty stout. Well in the process of making these mods, I tried to take the gun out for one last shootout before pulling it apart only to find the problems that I had with the power valve. This meant I had to replace the seal on the CO2 cartridge seat but after doing some searching online I found that there were some modified power valves (Again thanks to the customization world) that besides being completely fresh, also put out a little more juice to up the velocity. The power valve I settled on was actually part of a kit that included the power valve, a stronger hammer spring and a bigger port that will allow more gas to transition from the power valve output up into the barrel breech. I'm definitely liking the idea of more power with little real modification. I ordered this kit and waited. Once it showed up, it was time to get to work. I disassembled the gun, getting the old power valve out and having everything ready to reassemble with the new parts. The first place I started was with the lower receiver. I would have remove the old lower and disassemble the small parts from the assembly to transplant into the new lower. The new lower did come with a sear spring specifically for this lower so I didn't have to reuse the original sear spring. Everything else got reused. The next area of attack was the power valve itself. This was a pretty simple assembly as it just needed to be pushed into the main receiver tube then locked in place with a single bolt. From there I took the bushing and placed it in the O-ring in the receiver tube over the power valve. From there I took the bolt assembly and lined the breech of the barrel with the assembly so the port at the bottom of the bolt assembly and the barrel would line up in order to place the whole works on top of the bushing on the receiver. Now before I could bolt down the bolt assembly I had to insert the hammer into the receiver tube and insert the peg on top of the hammer that the bolt will catch when the bolt is used to cock the hammer back. Once the peg was placed in the hammer, the bolt assembly could go on. After bolting the bolt assembly down to the top of the receiver and tightening the set screw holding the barrel near the muzzle I then bolted the lower receiver onto the bottom of the receiver tube. The last things to go on the gun is the AR15 pistol grip and the suppressor. The pistol grip is held in place with a single bolt as it is on the AR rifle so this was pretty quick. The suppressor again is held in place with a set screw that holds the unit to the flat spot on the muzzle of the gun. With that, the modified 2240 is completed. Since I finished this gun at night, I just took a soda can and chucked it out in the main driveway and charged the gun with a CO2 cartridge and grabbed a tin of pellets. Now since the gun doesn't have a front sight you would think that being able to get accurate shots would be hard. It wasn't. Knowing where the old sight was situated, and referencing it to where the suppressor sits allowed me to just line the suppressor with the target to take my shots. Most of my shots hit home nicely. The way the pellets hit sounded like they were hitting harder than before. Of course without a chronograph I won't be able to tell what the velocity of the projectiles are in this gun. That will be something for a later date, getting a crony to use for future gun tests as I play around with air guns some more. Other mods I want to do to this gun are adding a folding stock that I seen that would give this gun carbine capability as well as be used as a pistol. There's a magazine mod that allows me to turn this gun into a true repeater for fast follow up shots. Of course since there's no full open sights I'll have to add some rails for a red dot sight or laser or both for more accurate shots. As stated, the modding of this gun is not complete, not by a long shot.
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