Nordic Components Extension Tube +3 12g

Nordic Components MXT magazine extension tube.

• MXT extension tube for changing magazine extension length and capacity
• Available in variety of lengths, from +1 to +9 (shell capacity measured with 2 3/4″ shells and may vary with shells of differing length)
• Features relief groove to eliminate barrel clamp travel and ensure repeatable placement after disassembly (+2 through +9 only)
• Relief groove is not centered and can be relocated by reversing the tube (thread pitch the same on both ends)
• Includes ONLY MXT tube
• May require purchase of new magazine spring if you are changing the capacity of your existing extension