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For use in 40rd AR-15 magazines
This 12coil mag spring is for use in most plus 4 extension base pads/140mm length magazines
Individual weights are 6
A stainless steel uncaptured guide rod designed to be used with ISMI flatwire springs
This uncaptured design allows the shooter to dis-assemble the guide rod for spring replacement
Hellcat PRO Guide Rod Hellcat Pro For use in 40rd AR-15ISMI rods are machined from stainless steel. This uncaptured design allows the shooter to dis assemble the guide rod for spring replacement, maintenance, or tuning of loads recoil springs with ease. Designed for use with ISMIs single flatwire springs. P N: HellcatPRO GR
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