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
ATTENTION!
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Our Magazine Parts Policies
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- ATTENTION!
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Before Inserting Magazine Into Firearm
The new MBX competition follower and spring sets need to be loaded 4-6 times to capacity to prevent the follower from popping out.
No Slide Lock Function