MBX "Ultra Max" Spring & Follower for Sig P320
- 24 ROUNDS WITH 140 EXTENSIONS
Henning Magazine Extension for Factory 21rd Magazine Here
Henning Magazine Extension for Factory 17rd Magazine Here
- 23 ROUNDS WITH FACTORY BASEPAD
IMPROVE YOUR EXTENDED 140 FACTORY MAGAZINE PERFORMANCE WITH MBX “NEW” MBX 'ULTRA MAX' SPRING & FOLLOWER SET FOR FACTORY SIG 320 MAGAZINE
*Note This Product will not lock slide back on last round fired
