Benelli 828 U Field Nickel Plated Receiver Walnut/Black 20ga 3in Over Under Shotgun - 28in - Benelli's patented steel locking system eliminates wear and tear on the receiver and hinge that cause traditional O/U's to fail. The heart of Benelli's Steel Locking System is a solid steel breech block that locks directly to the monoblock, containing all pressure from the shotshell and preventing its transfer to the receiver and hinge pins. Opening Lever Auto Recocking Benelli's Progressive Comfort System Flush Crio C, IC, M, IM, F Choke Tubes And Wrench Shim Kit Standard Hard Case Steel Locking System Impulse Activated Ejectors Removable Trigger Group