RHF (Railed Handguard, Forward Controls) is based on the superb CMT UHPR Mod2, with full length 1913 rails at 12 o'clock, and MLOK at 3, 6, and 9 o'clock.
Since its introduction in 2018, RHF has progressively become more robust and durable with the deletion on lightening cuts and slots. It's gained some weight in the latest 2020 version, but we value strength durability far more than light weight. It directly contradicts the light weight fad which, like all fads, are rarely about improving anything for the end user.
RHF is machined from 6000 series extruded aluminum, its barrel nut is machined from 7075 aluminum, both are Type 3 anodized, while the rail mounting hardware is machined from 17-4 PH (patent pending). RHF also incorporates anti-rotation tabs.
RHF's inside diameter is 1.315" and compatible with most low profile gas blocks. Barrel nut diameter is 1.378", barrel nut wrench is included.
RHF incorporates design input from Forward Controls, the changes include:
1. Omission of QD swivel attachment points. Location of the front sling attachment is left to individual users.
2. Barrel cooling vents changed to the classic round shape. One might say we're paying homage to Knight's Armament's RAS and RIS where meaningful modular revolution began.
3. Simplification of the already understated aesthetics of the CMT UHPR Mod 2 handguard.
Weight of each length as follows
Total weight, including mounting bracket and bolts: 7.2oz.
Barrel nut torque: milspec 40-50ft/lbs
Rail clamp screws torque: 45 in/lbs.
A single use (we've successfully used it half a dozen times without ill effects) barrel nut wrench is included.
Made in USA.
NOTE:
SIG M400 upper requires slight modification to fit RHF.
RHF is incompatible with BCM's Mk2 upper receivers without modification to the RHF's anti-rotation tabs, or to the upper receiver itself.
The scoffed up area is where RHF's anti-rotation tabs need to flank.
