MBX Competition 24+1 Spring & Follower for ALL 140mm 2011 FACTORY Magazines
**Must Be Paired with Magazine Extension to Extend Magazine to 141.25mm**
What You Have Been Waiting for MBX ULTIMATE 24rd +1 Spring Follower Set!
Featuring
MBX "NEW" Patent Pending Follower
& Proven 11 Coil Square Bottom Spring
Capacity Listed Below for 141.25mm Magazines:
- Staccato 24rd +1
- Checkmate 24rd +1
- Springfield 24rd +1
- SV Infinity 24rd +1
- Atlas 24rd +1
- Kimber 24rd +1
- BUL 24rd +1
*Note: Factory style tubes with the “NEW” MBX Spring and Follower Set that extend to 141.25mm allows for our combination using a non-lock-back NEW Competition Follower to hold 24rd +1
MBX has developed a New follower design for all other factory-style tubes: Springfield, Staccato, SV Infinity, Checkmate, Atlas. We use our same proven square bottom 11 coil competition spring that has performed flawlessly with millions of rounds. The new follower was developed and tested over 2 1/2 years as the follower need to help factor extended141.25 mm tubes to hold 24 rds and present the Bullet fast while keeping the bullet nose up in order to assure feeding from the first shot until the last round.
FYI
The follower and spring are designed to sit lower in the magazine than factory follower this is by design to stop any slide contact when the last round is fired because the competition follower will not contact the slide stop obviously the follower needs to sit lower. BE SURE TO FULLY LOAD MAGAZINE 3-4 times when New to Set the spring to its working length and avoid the follower getting hit by the slide damaging the spring and shoving the follower into the feed ramp. NOT A GOOD START!
Reload your own ammo!
Ammo recommend specs for reliability 2011
FYI Do not run short OAL or wide Crimp this is a performance killer Flat Nose projectile is not recommended Round nose is King
OAL 1.155 to 1.165
Crimp .372 -.374 max
Be sure all primers are seating correctly in pockets
I like to use the Lee crimp/seating die with carbide ring as it will straighten and projectile then crimp works great.
MBX is not responsible for the quality and problem solving of other manufacturers tubes and feeding. We have provided a proven spring and patent pending follower that will perform if the tubes/ammo are good. Some manufacturers tubes may have “soft feed lips” that will open out easily or bend if dropped. Other factory tubes may require additional adjustment “tuning” in order to perform correct this is not the responsibility of MBX.
Specs for Competition
We used these in testing for over 15,000 rounds! We do not want to cause any “controversy” with the magazine “tuning gurus”. This is what Adrian who designs all our magazines used in testing.
9mm 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 idk 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/Followers
If design is good it will work with very little pressure. Do not get all concerned because the spring lost length! It will!
The Spring we use on these Competition Kits not new. It has presented millions of rounds flawlessly over the last 10 years. Replace your main magazine springs every 6/8 months if re regular use but adjust if you shoot more or less that average 2-3 matches a month.
Follower 3D Printed
MBX Followers are made from a specific blend of material 2E have developed for this purpose and are 3D printed. If you are against the look or simply the ideal and feel this is not for you then please do not purchase. Remember the facts are MBX has been the most innovative company in the Magazine Business for Reliability, Performance, and Capacity which part of that is Developing Innovative 3D Follower Designs that Simply can not be effectively injected molded.
ATTENTION!
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