This rifle length SPR Straight top rail is a full Picatinny rail that connects the receiver to the forearm. This top requires the 8.5" rail with lugs in order to connect top rail to forearm. This creates a rigid platform ideal for mounting accessories.
This rail is constructed of hard coat black anodized T6 aluminum. Rail connects to rifle receiver with 3 cross bolts and the front of the rail connects to the forearms top rail using to screws. Rail is 17.7" in length with an add elevation of .450".
MK12 Mod 0 Top Rail