Information:

AR 15, 15" length free float rail mount with partial Picatinny Top rail and M-LOK slot system.  Steel barrel nut included.  CNC machined from Quality aluminum and black anodized. Super lightweight, only 14oz with barrel nut.

A true free float rail, which connects only at the Steel barrel nut. Since the rail doesn't touch the barrel, shooting accuracy is improved in comparison with two piece rails, when used with grips / bipods that can flex the Steel barrel.
Includes steel barrel nut, screws, (2) shim rings for barrel nut timing, (2) 3 slot M-LOK rail segments, (2) 7 slot M-LOK rail segments and M-LOK screw set.

*These will fit AR-15 uppers.  Therefore, they will also fit AR Pistol builds that have AR-15 upper barrel nut threading such as the 300 Blackout and the AR-9.

Detail:
Specs:  15" Long, 1.6" wide, 2.0" tall.
Weighs 14oz.