+7 round Mag Extension for PSA 5.7 Rock - Black Anodized

Excess Arms

(28 reviews) Write a Review
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Product Overview

Add 7 rounds of capacity to your PSA 5.7 Rock Magazine. Machined from 6061 aluminum and hardcoat anodized for superior wear and corrosion resistance. Extended length Magazine Spring is wound from high strength Music Wire to ensure unparalleled reliability without needlessly increasing loading force.

Magazine Extension includes:
  • Extended length magazine spring.
  • Set screws and Allen key.
  • Magazine Extension made from Billet Aluminum with Black Hardcoat anodized finish. 


DISCLAIMER: This product is not manufactured, authorized, endorsed or warranted by Palmetto State Armory. Palmetto State Armory does not warrant or represent that this product is compatible with Palmetto State Armory pistols.


(28 reviews) Write a Review

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  • 5
    PSa 5.7

    Posted by Dwayne S on May 16th 2024

    Solid construction, functional worth the money I spent…

  • 5
    Excellent product

    Posted by Rt on May 5th 2024

    Highquality direct fit

  • 5
    +7 mag extension

    Posted by Vill on Mar 27th 2024

    A must have for all rock 5.7 owners not only does it make you gun look amazing , it's a quick easy install, that give you 30 rounds of stoping power . its reliable and worth every penny

  • 5
    Rock mag extension

    Posted by Morgan on Mar 15th 2024

    Pretty awesome. Love it

  • 4
    Excellent product

    Posted by william on Mar 15th 2024

    Fit and finish is solid, easy to install, seems well made. Would be nice if it came with a small amount of thread locker and disassembly directions. Tip: push down on psa logo on your factory mag plate to remove it.