MBX Duty & Carry Spring & Follower for Atlas / Bul / Springfield Prodigy / SV / Staccato 2011 Magazines

TAKE YOUR MAGAZINES TO THE NEXT LEVEL WITH THE MBX COMPETITION FOLLOWER SPRING SETS TO ACHIEVE 23RDS

HOLD 21 RDS FOR 140MM & 18RDS FOR 126MM

FOR:
STACCATO/STI FACTORY TUBES
SPRINGFIELD PRODIGY FACTORY TUBES
SVI/INFINITY FACTORY TUBES
CHECKMATE/ATLAS GUN WORKS FACTORY TUBES
BUL/ARMSCOR/PARA FACTORY TUBES

We set out to provide a performance package for factory tubes that would improve reliability, performance, and capacity so you can have it ALL! One Extra Round and supreme reliability of the MBX Follower Design totaling 13 coils and a thicker .052 Spring wire but still achieving better capacity than stock factory magazines. MBX designed and worked closely with the finest spring company Wolff gunsprings to manufacture this product. We have tested it over the past 24 months and are thrilled to release it.

MBX Notes for new spring and followers sets

MBX is not responsible for the quality and problem solving of other manufacturers tubes and feeding. We have provided a proven spring and follower that will perform if the tubes/ammo are good. Some manufacturer's tubes may have "soft fed lips" that will open out easily or bend if dropped. Other factory tubes may require additional adjustment "tuning" in order to perform correctly. This is not the responsibility of MBX.

Specs for competition

We used these in testing for over 15,000 rds! We don't want to cause any "controversy" with the mag "tuning gurus." This is what Adrian, who designs all our mags used in testing.

9 mm generic specs, we can only suggest is the front feed lips which needs to be less narrowing .005 -.007 of the rear lips. For Example, rear Measures .345 front to be set .340-.338. All 9mm ammo oal 1.145-1.165 max, crimp factory specs "very important" crimp around .372 we really only round nose .38 super comp max oal 1.255.

Springs/follower

If the design is good, it will work with very little pressure. Don't get all concerned because the spring lost length! It will!

The spring we use on these competition kits is not new. It has presented millions or rounds flawlessly over the last 10 years. Replace your main mag springs every 6 / 8 months if regular used. Adjust if you shoot more or less than average 2-3 matches a month.

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