Tippmann U.S. Army Alpha Black Basic Edition Airsoft Guns Two piece alignment is a

Two piece alignment is a critical factor in a barrel’s true accuracy

That's right - the clamping feedneck that is widely used throughout the paintball industry was originally designed by the folks at DP Engineering

among others:

The Dragon 7

Tippmann U.S. Army Alpha Black Basic Edition Airsoft Guns Two piece alignment is aAlpha Black features a realistic military appearance and comes with a high performance 11" barrel, an integrated carry handle and a removable magazine that doubles as a tool kit. Manufactured by Tippmann Sports, Alpha Black boasts an in line bolt system, all aluminum die cast receiver, stainless steel gas line and quick release feeder elbow.