MBX "Ultra Max" Replacement Spring for CZ, M&P, Walther, Canik, Beretta and Springfield
*For Use in Conjunction with MBX Ultra Max Follower Factory CZ, M&P, Walther, Canik, Beretta and Springfield Tube & 140 Extension for 24 rounds
*IS NOT DESIGNED TO FIT ON FACTORY FOLLOWER
- Spring only
- Must use MBX Ultra Max Follower
