HS Armory Barrel Lock Down Kit

This HS Armory Barrel Lock Down Kit combines 3 different proven systems to stabilize the barrel in all axis which can greatly increase accuracy and consistency. The wedge shaped device is a barrel shim that is inserted between the inner and outer barrel at the muzzle end to prevent the inner barrel from moving in the outer. The Hopup Stabilization Ring replaces the brass ring commonly found on the front of most hopup units. Unlike the brass ring, the Stabilization Ring is wedge shaped and prevents the hopup even the slightest amount. The spacers are placed in the front of the hopup unit on the barrel and press the hopup unit against the gearbox so it cannot move forward or backwards. They also help stabilize the hopup unit because it's being pressed against the gear box. There are 3 spacers but only some might be used depending on the gun design. Also make sure that you can access the front of the inner barrel and there is something for the spacers to press against (these are rarely a problem in M4 rifles, but some others might not have these things so many need modification)