The majority of these documents describe and illustrate improvised firearm modifications that can be performed in any fairly well equipped home workshop.
Firearm modification is done in order to enhance performance or to facilitate hiding the weapon. Gun modification can include anything from a trigger job, to putting in a bull barrel to polishing up internal parts to make it run smoother.
Two of the most modified guns are the Ruger 10/22 and the AR-15. There are many, many different companies that manufacture after-market stocks, barrels, triggers, sights, and internal parts for these guns. There are companies that also make kits to convert a centerfire pistol to shoot rimfire .22LR, as .22 cartridges are far cheaper to practice on.
So you own a stock-standard firearm and your're looking to adapt a different magazine, adjust the rate of fire or shorten the barrel? No matter what you're trying to achieve, there'll be a guide in here that can help.
Don't try and perform gun modifications on your own! You'll most likely end up ruining your weapon. Read these guides and plans below now!
Gunsmithing Training Manual, demonstrates the simple techniques for modifying and ameliorating various firearms, ammo, and gun accessories such as silencers, suppressors, scopes, sights, Gun straps, harnesses, stock. It also discusses the different ways to gain licenses or permits for Uzi pistol and rifle, along with the procedure to acquire Federal permission to modify your gun to selective fire.
This concise instruction manual explains, with the use of diagrams, how to convert an SKS carbine to accept Ak–47 mags. Details are covered, such as the modification of the magazine, trigger, bolt, frame, new magazine catch, and stock.
M1 Garand Compensator, provides details on how to reduce the severe recoil of the M1 Garand with a new compensator. This manual provides a physical description of the compensator, along with materials required for installation.

