Upper receiver extension
shorter and longer variant, suitable for RSR versions with 13“ and 16“ barrels (shorter version can be used on both barrel lenghts). These extensions provide aditional grip space, offer multiple support points for secure grip and easier, more precise manipulation especially in sport shooting. Aditionally, short picatinny rail for flip – up front sight is available, allowing for longer sight radius. Installation is simple and can be done with only a hex wrench.