Forward Controls Design RHF4 AR-15 Free Float Quad Rail Handguard

Forward Controls Design RHF4 AR-15 Free Float Quad Rail HandguardWe have long been fans of the classic KAC RAS since the early 2000s. Throughout the years, we've seen trends toward lighter, small-diameter, and rails-only hand guards where you want them. This was before the advent of Keymod and MLOK. Then, the quad rail made a comeback. We don't follow trends for many reasons, chief among them is that practical designs aren't subject to ever-changing fads that, in our opinion, are quite aimless. Practical and durable designs are always helpful, regardless of which way the wind blows. We've stayed with hand guards with 1913 rails in four quadrants for their versatility, and we weren't concerned with the then-popular, now less-popular ways of using the support hand to grasp the hand guard, which called for a smaller diameter. Quad rails still offer the most versatility and rigid means of attaching Picatinny-based accessories. While we do offer MLOK hand guards (RHF, with 1913 rails on top, and MLOK at 3, 6, and 9 o'clock), a quad rail hand guard is what we've always wanted. RHF4 comes in two lengths, 11.5" and 9.5". It is a quad-rail handguard based on the successful Centurion Arms C4 rail system. It is a lightweight, rugged, 2-piece free float rail that provides a continuous 12 o'clock rail when installed on the upper receiver. Like the C4 system, RHF4 is a rigid rail that clamps to a standard barrel nut on all AR-15, M4, and M16-type weapons systems. This design allows installing the rail on an upper assembly without removing the front sight post or permanently attached muzzle devices. RHF4 incorporates Forward Controls design input: Omission of built-in QD swivel attachment points. Some like the now common front and rear located QD sockets, we prefer that the location of the front sling attachment be left to individual users. A BCM rail-mounted QD sling adapter is included (the QD sling adapter can be removed in the drop-down menu; if you don't need it or already have one, please see the QD sling adapter drop-down menu). The rail numbers are machine-engraved, and a subdued Cygnus is engraved on the right side of the RHF4. RHF4 has KAC rail panel clip cutouts in front and back.Features Material: 6061 T6 Finish: Type 3 hard-coat anodized Weight: RHF4 11.5: 12.4oz with screws---1.1oz with standard barrel nut. RHF4 9.5: 10.5oz with screws---1.1oz more with standard barrel nut Length: RHF4 11.5: Top and sides: 11 1/2in. Bottom: 10 5/8in. RHF4 9.5: top 7.25 in, Sides 9.5 in, Bottom 8 in Width: 2.1in Height: 2.38 Inside diameter: 1.37 Rails: 1913 spec rail Fasteners: grade 8 bolts, phosphate finished MADE IN USA**Does not include a barrel nut. This product clamps onto your existing mil-spec/GI barrel nut.**RHF4 installation directions can be found here (a hard copy is included with RHF4).NOTE: RHF4 is incompatible with BCM's Mk2 upper receivers without modification to the RHF4's anti-rotation tabs, or to the upper receiver itself.The scooped-up area is where RHF4's anti-rotation tabs need to flank.