GWACS Lightweight AR-15 Lower Review

Over at AllOutdoor, Oleg Volk reviews the GWACS Lower, an updated version of the polymer lower that used to be manufactured by Cavalry Arms. The Cav Arms lower was popular back in the day but the company went out of business and sold off their designs and equipment. Oleg writes

Unlike polymer clones of the original metal receiver, the GWACS Lower is extensively reinforced with internal ribs for strength in key points. Currently available in five colors for $199 each, these Lowers represent a saving of $126 over a conventional complete AR Lower ($325). That is achieved in large part by molding the grip and the buttstock integrally with the receiver. Shorter AR-15 A1 length stock makes the rifle suitable for a wider range of shooter sizes.

Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


  • Cornelius Carroll

    Huge fan of the GWACS lowers. Only polymer lower worth buying IMO.

    • Clint Notestine

      ive had a plum crazy for 3 years with zero problems

  • Lance

    Forget your new AR you got a nice looking Girlfriend who shoots with you Steve, Congrats.

    • Formynder

      The review was by Oleg Volk, as mentioned several times, not by Steve.

  • Juice

    A lovely review but that is some badly matching camo-clothing.

    Steve, buy here some nice Multicam pants for Christmas 😉

    • Juice

      Or A-TACS! Can’t go wrong with A-TACS!

  • Ken

    A full lower assembly with an aluminum receiver is $200 at Palmetto State Armory, or $180 for a blem with Magpul furniture. A Spikes lower assembly is $260 at Aim Surplus. I don’t know where they got the $325 figure from.

    • Brandon

      The article on AllOutdoor links to a complete A2 lower from some company called Superior Arms Inc. (never heard of them)
      I agree PSA and Spikes are the way to go.

  • dan citizen

    The Cav-Arms lowers have been an absolute must when doing ultraight AR builds (4# and below) I’m glad to see they are producing them again.

  • Tim U

    GWACS is the only polymer lower I’d trust. If I get enough funds for a 2nd AR in 5.56 or similar, I’d consider it for my build. Right now I need to answer the .308 call first.

  • Mike

    Cav-Arms did not go out of business…they were forced out of business.