For many years, Pearce Grips have been well-known with the handgun industry. Because of this, they wanted to ensure that every shooter has access to grips for their handguns that provide the best shooting experience possible regardless of the situation and environment. From this, they have developed the Pearce Grip Glock 36 Grip Frame Insert. This particular unit installs in the bottom rear cavity of the Glock M36 frame being sure to utilize a friction fit for retention within the frame while helping keep debris out of the magazine well. The Pearce Grips Glock M36 Grip Frame Insert will not work with the Pearce Grips PF-36 Grip Extension.