This tube is perfect for your high end pistol builds. Military hard annodized black finish. Uses standard carbine buffer and spring not included. No lock nut is required as the tube shoulders itself on the receiver. Also the endplate must have the alignment tab removed or ground down to allow the tube to spin freely through it. The Gen 2 enhanced tubes feature a larger shoulder dia for increased lockup surface for extra strength and stiffness.

Specs
Tube Diameter 1.250"
Shoulder Diameter 1.375"
Tube Weight 4.8 oz
Tube extends from teh receiver 7.125" from the endplate