Briley Mfg - Give your M4 the upgrade it deserves! • Triggers, Trigger Guards, Magazine Replacements and Extensions, Magazine Followers, Handguards, EZ levers/Articulating Latch, Bolt Handles, and Chokes. At #brileymanufacturing we got
Benelli M4. Adjustable stock/Briley Handguard/esstac - Semi Auto Shotguns at GunBroker.com : 1003681509
Briley MLOK Handguard for M4 - Benelli - Benelli USA Forums