|13″ M4 Handguard MK4 – Black||05-227B|
Geissele – 13″ M4 HANDGUARD MK4 – BLACK
The Geissele Automatics Super Modular Rail Mark 4 is a free float rail system developed for the M4 and all Mil-Spec AR-15 variants . It features one fixed, fulllength M1913 Rail at the 12 o'clock position and abbreviated rails at 3, 6, & 9 o'clock at the muzzle end of the rail . This allows the shooter to mount accessories in the most commonly used positions while still having a smooth, ergonomic feel on the rest of the rail. Also machined into the rail are 4 industry standard QD swivel mounts to attach weapons slings. The SMR Mk4 is one integral piece machined from a semi-billet extrusion of aircraft grade aluminum to provide strength and rigidity at a low weight . It attaches to the gun using a Geissele proprietary aluminum barrel nut; included in the kit along with a combination wrench to remove the stock barrel nut and install the Geissele one. The Geissele barrel nut needs no indexing to the gas tube and is easily installed by just tightening the barrel nut to the specified torque value. Once the barrel nut is installed, the SMR Mk4 is easy to attach and remove with only two bolts attaching the rail to the barrel nut and two alignment screws used to index the rail to the rest of the gun.
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