The KWA LM4 PTR KR Series are now in stock at AirSplat.com. These are gas blowback rifles of various lengths sporting the KeyMod Rail System... "New to KWA’s LM4 platform is the KR 14 gas blow back rifle. This LM4 variant boast the new KWA KeyMod rail interface that combines light weight ergonomics with rugged durability. These SPR’s are available in five lengths ranging from a 6 inch barrel all the way up to a 20 inch barrel to give the operator a rifle for every situation. These modern features coupled with the tried and true designs of the standard issue AR15 make this rifle easily adaptable for any situation."