AR 15 M-Lok Handguards are replacing the old picattiny rail system. M-Lok is a universal system, developed by Magpul, of attachments that locks into your free float tube M-Lok slots. It is very versatile and customizable locking system. Here at Veriforce Tactical we sell the best AR 15 m-lok Handguards on the market. With a big variety of styles, you will only have to look in one place for all your AR 15 M-lok rails. We also sell the M-lok accessories that will attach to your M-lok forend.