MM BK1S MK18 7.5 inch Handguard

For builders chasing a classic, old-school look rather than the newer M-LOK trend, the MM BK1S MK18 7.5 inch Handguard brings back a traditional quad-rail handguard styled after the MK18 platform — four full picatinny rails around the barrel for mounting grips, lights, and lasers wherever you need them. It fits both the BK1S and BK2S.

The kit includes the centering piece and barrel nut required to mount it securely and keep the rails true to the barrel. If you'd rather run M-LOK slots or a slimmer profile, our SIG 552 or Honeybadger handguards are worth a look instead — but for a full quad-rail setup with the most mounting real estate, this is the one to get. Available in black, yellow, and silver as standard, with other colours available on request.