The CMMG AR-15 carbine piston conversion replaces your existing front sight base, handguard cap, handguards and bolt carrier on any stock AR15 style carbine upper.
Moderate gunsmithing is required, and detailed instructions are included.
Piston systems are cleaner on the operating systems due to hot gasses being diverted at the gas block instead of the upper receiver. Piston is hard chrome plated and is removable from the front of the gas block. Bolt carrier has impingement key built in for maximum strength. Gas block has an on and off setting for use with a suppressor, or remove the piston and set the gas system to off for use with our .22 conversion system. For use only on semi or full automatic firearms with any barrel length.
Comes complete with M4 type plastic handguards modified for the piston conversion system, 1-piece bolt carrier, and a clamp on gas block with an upper height picatinny rail for a front sight (such as MagPul MBUS or Troy Folding Front Battle Sights).
This product was added to our catalog on Thursday 01 October, 2009.