A highly functional billet upper receiver with some great advancements.
URF is based on CMT’s URPR-1 7075 billet upper receiver. Type 3 hard coated in black, it is an excellent basis for the two ergonomics driven changes FCD has always wanted:
1. Relief cuts on the section before rails start for better accessibility of a flip up BUIS’s sight stalk/flip up element.
2. Relief on the top of the forward assist housing. The relief cut is specifically designed for ambi charging handle users. When the user uses his right fingers to pinch and grasp the CH’s right latch, the relief allows the index finger to reach down further, so the CH’s right latch is positioned in the middle of his finger pad, not the tip of it, which will give a more secure purchase, especially if the user has gloves on. When we use our left fingers to grab the charging handle’s left latch, there is nothing below the latch, but on an upper with forward assist, its housing stands in the way. The relief simply provides what room that can be spared on the FA housing so more of the user’s finger can have a positive purchase.
The FA housing relief is a simple broad stroke. In retrospect, FCD could have made its presence less shockingly obvious. The change they made is there to work. FCD didn’t give much thoughts to how it’d look, only that it’d create as much clearance as the FA housing can afford to give. The FCD design philosophy emphasizes utility, innovation, and quality derived advantages, aesthetics is a super minority in this equation.
* 5 axis machined from 7075 T6 billet
* M4 feed ramps
* Engraved “T” numbers
* Over pressure gas relief vent for suppressed use
* 1913 picatinny Rail flat top
* Mil Spec Type III class II hard coat anodized Black
* Shell deflector
* Forward Assist machined into receiver (on standard URF v2 only, URF-S v2 has no provisions for a forward assist)
* Dust cover port machined into receiver
* Increased wall thickness for added rigidity
* Compatible with Mil spec parts
* Compatible with most aftermarket handguard/rail systems
* Anti-rotation hole above gas tube hole
* Compatible with “Tactical Link” Enhanced Battery Assist Lever
* Compatible with LMT MARS-L lower receiver
* Comes stripped without dust cover & forward assist assembly
* Weight: 8.9oz (URF v2), 8.56oz (URF-S v2)