Precision Reflex SPR G2 PEQ Top Tactical Rail For PRI Rifle Length Forearms Black. The rail connects to the receiver with 3 crossbolts and then there are 2 flat head screws that attach the top rail to the forearm rails 2 stainless steel lugs to create a very ridgid platform. The rail is constructed of hard coated black anodized aluminum. The rail is 17 1/2 inches long and raises the receiver height up .450 inches. Specifications for Precision Reflex SPR G2 PEQ Top Tactical Rail: Manufacturer: Precision Reflex Fabric/Material: Aluminum Gun Rail: Full Top Rail Cant: 0 MOA Gun Make: AR Platform Length: 17.5 in Height: 0.45 in Quantity: 1 Package Contents: Precision Reflex SPR G2 PEQ Top Tactical Rail Precision Reflex 05-PEQ-G2: SPR G2 PEQ Top Tactical Rail For PRI Rifle Length Forearms Black