The LM4 PTR bolt carrier comes with the carrier key installed and will fit all LM4 PTR Series rifles, including the LM4 PTR standard, LM4C PTR, and LM4 RIS PTR, as well as the new LM4 KeyMod line. Please note that this does not come with the metal piston stop, part 36. The piston stop is sold separately and can be found in the link below:
https://kwausa.com/product/lm4-ptr-bolt-carrier-piston-stop/
The KWA metal receiver carry handle is made to fit almost any railed AR-15 or M16 style receiver and is made of durable metal alloy. This assembly comes complete with toolless knobs to easily attach and detach the handle, and is strong enough to carry the weight of any full metal AR-platform rifle. Use this to customize your KM4, RM4, or LM4 to the look you want. Features a level channel for installation of aftermarket receiver carry handle rail attachments, as well as a sight that has adjustment knobs for windage & elevation.
The LM4D bolt is made of sturdy nylon polymer and is a direct replacement for all LM4D rifles, including the LM4D and LM4D M Lok.
The bolt is the primary component of the most realistic gas blowback rifle available, and is the heart of the LM4's Force Velocity gas system.