The FN SLP shotgun is a semi-automatic 12-gauge shotgun designed and manufactured by FN Herstal in Belgium. The SLP shotgun is gas-operated. The SLP is a modern self-loading shotgun of US origin that was designed for law enforcement use. SLP stands for "Self Loading Police shotgun". The SLP is semi-automatic shotgun firing 12ga shells of 2.75 and 3 inch length. For a self-loading shotgun the SLP is very reliable and the fast cycling mechanism allows for quick follow up shots. New condition $1200