Mesa Tactical Saddle Rails comprise aluminum brackets that wrap around the top of the shotgun receiver. The factory trigger pins are replaced by internally thread steel pins, to which both sides of the saddle rail are securely bolted. SureShell Saddle Rails feature a MIL-STD-1913 Picatinny sight rail along the top, and a six shot SureShell shotshell carrier yoke on the left side of the receiver.