Feb 22, 2015 . J. Stevens Manufacturing Co. "Springfield" 16ga. Break barrel, cylinder bore slug gun. Shells are about as available as 12ga. Jun 29, 2012 . This is an old side by side double-barrel shotgun manufactured by J. Stevens Arms. It is 12 gauge. Sep 25, 2014 . Stevens 311 shotgun reassembly tips.. Gunsmithing - British Side-by-Side Shotguns How to Re-assemble a Boxlock - Duration: 40:25. Need gun parts and accessories for 5100? Look no. Stevens 5100 Schematic W/ Parts List. Forend Assembly, .410 Ga., Cut Checkered Walnut, New Style.I have a Stevens model 311, side by side 20 GA shotgun. has a small number stamp just below the forwrd pin that mounts the hammers internally: 5100. . This assembly is clacked by the spring loaded hammer at firing.I have a 16 ga springfield j. stevens arms co. model 5100/ also shown as a 311.. The letters you posted are either assembly or inspectors markings and have . How do i field strip my Savage Stevens 311a .410 side by side. by Guest 3 yearsy ago on any info on 16 gauge stevens side by side 5100..value or age . Model 820B pump doesn't eject shells, help · Stevens 5100/311 16ga trigger guard. Trouble assembling springfield/savage 67F · turkey with a stevens 94b . Also, I know the Savage/Stevens/Springfield Model 5100 was on the assembly/ disassembly for a Springfield-Stevens 5100 double-barrel . Hi, I have a Stevens 5100 side by side shotgun, but I've been unable to determine when it was made. Can anyone out there help out?