Handguards & Rails

AR-15 handguards and rails from Aero Precision, Bravo Company, Ballistic Advantage, Faxon, Breek and Battle Arms: free-float M-LOK rails from 7 to 15 inches, quad rails, and the Aero MOD 4 and BCM MCMR lines. Most include the barrel nut and mounting hardware, and the listing says so.
Ships to your door. The two things to check are the barrel nut pattern, since some rails only fit their maker’s upper, and length, since the rail should stop about an inch short of the muzzle to leave room for a brake. Our Aero MOD 4 guide covers both questions in detail for that rail, and most of the advice applies to any free-float handguard.