Enhanced 300blk PMAGs with ISMI springs assembled by Eitri's Enhancements, LLC.
 
These are our choice of magazine for 300blk platforms as we have found these to perform the best in relation to stacking, friction, consistency and cost.
 
These magazines were excellent out of the box. However, during our testing we found that they still were not able to keep up with high bolt carrier velocities in extreme cases due to the original weaker 17-7 stainless spring.
 
This is why we pre-assemble these magazines with upgraded, extra power chrome-silicon springs from ISMI!
 
These springs increase the PMAG's ability to keep up with high bolt velocities caused by supers, while also assisting with the increased weight of subsonic ammunition.
 
These magazines also include a Ranger Band which is used for simple visual and tactile identification.
Not only that, but a simple reposition of the Ranger Band can be used to expose or cover laser engraving to have a visual indicator of wether the ammo is super-sonic or sub-sonic, without having to commit any mags to a specific ammo type!
 
NOTE:
WILL NOT SHIP TO BAN STATES. If you place an order for these magazines and your state has magazine restrictions, your order will be cancelled and refunded with a 10% re-stocking fee.