The SCT Manufacturing GlockA(R) Compatible Sub Compact complete assembled frame is going to change the way you build pistols. It is the only frame at this price point packed with this level of features. This is a serialized frame with shooter-oriented ergonomics. Polished stainless steel over molded rails provide the optimal platform that is ready to build. They are made with an industry leading proprietary polymer blend and compatible with GlockA(R) 43X and 48 components. Each frame is assembled using a combination of GlockA(R) OEM and SCT manufactured parts by a certified armorer. The last step of each frame assembly is function testing utilizing a GlockA(R) factory slide check Mfg: Sct Manufacturing