Catalyst Arms Hardpoint rail extension for the Ruger PC Carbine clamps directly to forend Picatinny rail with no modifications. Provides three M-LOK R mounting locations for lights, lasers, vertical forward grips and other accessories. Integral ambidextrous push button QD sling mounting points for the forend and butt stock. Note: Magpul MLOK three slot rails sold separately.Kit includes our innovative HARDPOINT L.O.P. (length of pull) spacer for the PC Carbine which features an ambidextrous, integral push button QD sling attachment point. Simply replace or add our spacer between the butt stock and butt pad and the rear sling attachment is ready for use. Machined from 6061-T6 Aluminum - hard coat anodized in matte black.