The FN Tactical Police Shotgun is also available with a fixed A2-style buttstock for those operators who prefer this configuration. All other TPS features remain the same, including the FN Internal Tactical Choke (ITC) and an M1913 rail system already drilled and tapped to accept an optional C-More Systems® Reflex Sight. The TPS Fixed Stock model is also available in 18” and 14” barrels with screw-in choke tubes (improved cylinder and modified choke tubes supplied).