Does not fit the Shocker NXT.The Q-Lock solves all your hopper issues. Open the quick release lever, insert the hopper, hand-tighten the thumbscrew and then close the lever. No tools needed. The Q-Lock has an abrasive internal surface to securely hold any hopper in its place. The Q-Lock fits all Smart Parts markers. The Q-Lock also fits most center feed Spyder and Piranha paintball guns with an adapter.