The FN Police Shotgun has a four-lug rotary bolt that locks directly to the barrel.This design enables very quick disengagement of the bolt after firing for extremely fast follow up shots.The inertia generated as a shell fires actually starts the forearm and slides movement rearward.Front and rear sights for enhanced accuracy are standard,and the receiver is drilled and tapped.FN shotguns has a fixed choke.To facilitate the use by officers wearing body armor or tactical vest, the FN Police Shotgun has a shorter stock. Then length of pull is 13 1/2 inches, which is 1/2 to 3/4 of an inch shorter than most other shotguns. Specification Gauge: 12ga Chamber: 3" Action: Rotary Bolt,Pump Action Capacity: 7 + 1 or 4 + 1 Receiver: Drilled and Tapped for installation of Optional Sights. Safety: Crossbolt Barrel: 18"; Ghost Ring Sights Rear,Front Optional(Tactical Police) Standard Rifle Sights (Police Shotgun) Chokes: Tactical Police- Fixed & Screw-In Rem chokes Police Shotgun- Interchangeable Chokes IC,Mod *SUPPPLIED Stock: Collapsible/adjustable Stock Pistol Grip Black (Tactical Police) Deluxe Recoil Pad (Tactical Police) Standard Ventilated Rubber Pad (Police) Black Synthetic Stock & Forearm (Police) Length Of Pull: 13 1/2 Overall Length: 37.75" Tactical Ported(Extended) 34.5" Tactical Ported(Collapsed) 38.75" Police W/Rifle Sights Weight w/ Empty Mag: 6.5 lbs