Precision Reflex .308 DPMS Delta C.F.Forearm Rifle Length Black. The forearm has additional over the barrel clearance. The forearm comes with 4 rails a 8.5in rail on top and (3) 3in rails at 36 and 9 O'clock positions. This item is 12 3/4in long Specifications for Precision Reflex DPMS Delta C.F. Forearm: Manufacturer: Precision Reflex Fabric/Material: Carbon Fiber/Aluminum/Steel Gun Make: DPMS Gun Model: DPMS LR-308 Gun Type: Rifle Gun Rail: Standard Gas System Length: Rifle Length Mount Type: Rail Quantity: 1 Package Contents: Precision Reflex DPMS Delta C.F. Forearm Precision Reflex 03-071-14B: .308 DPMS Delta C.F.Forearm Rifle Length Black