GG&G Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp Black. The GG&G Beretta 1301 Magazine Tube Extension provided 2 additional rounds. This two shot Magazine Tube Extension uses the factory follower. Perfect for Military Law Enforcement and Home Defense use. IMPORTANT: The GG&G Beretta 1301 Mag Tube Extension Will Not Fit The Beretta 1301 Tactical Gen III Model. Specifications for GG&G Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp: Manufacturer: GG&G Color: Black Fabric/Material: 6061-T6 Aluminum Magazine Capacity: 2 Round Gun Make: Beretta Gun Model: Beretta 1301 Tactical Included Accessories: Beretta Barrel Clamp Condition: New Country of Origin: USA Features of GG&G Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp Fits 12ga Beretta 1301 Tactical Shotguns. Package includes the GG&G Barrel Clamp. The two shot Beretta 1301 Mag Tube Extension does not protrude beyond the muzzle of the barrel. Unlike the competition the magazine extension tube nut is CNC machined from wear resistant solid steel bar stock versus aluminum. When installed properly the solid steel ratchet base on the Beretta mag tube extension nut securely retains the barrel under recoil. Package Contents: GG&G Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp What firearm models does the manufacturer say GG&G Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp is compatible with? The manufacturer says that GG&G Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp is compatible with Beretta 1301 TacticalGG&G GGG-2570: Beretta 1301 Shotgun Magazine Tube Extension With Barrel Clamp Black