Perfect for 13.7" barrels
12.9" Exact Top rail length
12.9oz with Barrel Nut and Hardware
DPMS High receiver height
​1.4" ID
Gen 4 
Mil-Spec Hardcoat Anodize
7075 Barrel nut w/ Hardcoat Anodize
Melonite Finish Hardware
Free Floating Design
Slip fit locking mount design
Billet Anti Rotation Insert
Anti Slip Design
Barrel nut uses standard wrenches or SLR Billet wrench
Continuous top rail design
Mil-Spec 1913 Mounting rails