Aero Precision AR-15 MOD 4 10.6" M-LOK Handguard

The MOD 4 is Aero Precision's stiff handguard, short for Minimal Optical Deflection. A steel barrel nut ties it to the upper receiver and keeps point of impact from wandering when a laser aiming device puts pressure on the rail. This version is 10.6" long in black anodizing.

M-LOK slots cover all 7 sides from end to end, and the four QD sockets are steel reinforced so they do not wear out under steel swivels. No timing is needed at the barrel nut, its lugs match mil-spec castle nut wrenches, and two anti-rotation set screws tighten the fit on other brands' uppers. Low profile gas blocks fit inside the 1.2" bore.