• +7 round Mag Extension for PSA 5.7 Rock
  • +7 round Mag Extension for PSA 5.7 Rock
  • +7 round Mag Extension for PSA 5.7 Rock

    • +7 round Mag Extension for PSA 5.7 Rock

    $44.99
    (65 reviews) Write a Review
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    Product Description

    Add 7 rounds of capacity to your PSA 5.7 Rock Magazine. Machined from 6061 aluminum and finished with Cerakote or Black Hardcote Anodizing. 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. 

     

    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.

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    • 5
      +7 Round Mag Extension

      Posted by Coach on Apr 1st 2026

      Super great product! I own multiple of these and they are top quality & easy to install. (I recommend loctite for the set screws)

    • 5
      Magazine extension for the rock 5.7

      Posted by David on Mar 20th 2026

      Absolutely a perfect addition. Superior quality, perfect machining actually made of aluminum!! I actually thought it was going to be polymer so I was pleasantly surprised. Superior product I will be buying more.!!!

    • 5
      +7 mag extention for psa rock 5.7

      Posted by Robert on Mar 18th 2026

      Fits like a glove came with everything that it requires, easy to install I would recommend it to anyone.

    • 5
      7 Round Mag that ROCKS!!

      Posted by Jim on Mar 7th 2026

      I got the 7 pound mag extension and it rocks. It's made of solid metal and fits like a glove. it took my 23 round pistol mag to 30 rounds. That probably makes it the highest capacity pistol mag that doesn't stick out to far. Professionally made, I highly advise them. After 27 years as a US Army Green Beret I know quality kit.

    • 3
      nice addition

      Posted by michael m on Mar 2nd 2026

      good quality and nice feel, but the price is alittle steep in my opinion and with the lack of color options. would recommend and will buy again.

    • 5
      As advertised

      Posted by Vance on Mar 2nd 2026

      Works perfectly as described

    • 5
      I really appreciate buying this extension it's worth it.

      Posted by Orlando on Feb 6th 2026

      Great extension works well for me.

    • 5
      One of the best upgrades for the Rock5.7

      Posted by S.Thor on Jan 27th 2026

      On my 3rd extension 7 round magazine for the Rock5.7 no issues at all will keep buying more

    • 5
      Mag extension 5.7

      Posted by Jason on Jan 18th 2026

      Just wow. First inhalation was quick and easy.. Second the added weight is nice and helps it find the right place in the palm. Third feeds perfectly absolutely wonderful and going from 23 to 30. Thank you.