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14.125" 1928 Thompson Machine Gun Barrel 45 ACP

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Product Description

14.125" 1928 Thompson Machine Gun Barrel, Full Auto Chamber, 45 ACP, Fully machined with square-shouldered fins, and muzzle thread. This unique length is designed to allow the permanent installation of a Cutts-type compensator to meet the 16" legal minimum barrel length. Made from high grade 4140 chrome moly steel, Machine finish - in the white. Button rifled, thermo stress relieved, air gauged. 45 ACP. 1:16 twist, .442 bore / .452 groove diameter.

Under "See 2 more pictures" there is a detailed drawing of this barrel.

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Product Reviews

  1. Great Company 5 Star Review

    Posted by on 16th Dec 2016

    Great Company, Great Product. Looking forward to doing business with this company again.

  2. great work 5 Star Review

    Posted by on 13th Jan 2016

    I ordered this barrel for a 1928 re-weld semiauto build. Threads are sharp and crisp. Fits perfect to the 1940-43 receiver and cutts compensator. The 14.125 length is perfect for the non SBR build. As short as possible without violating the 16" requirement. Fins are square and sharp. The machining of this barrel is outstanding and I would recommend this barrel to anyone building a non SBR Thompson sub machine gun. Thank you green mountain rifle barrel company. Top notch.

  3. EXCELLENT!! 5 Star Review

    Posted by on 24th Nov 2015

    Great way to legally build a thompson with a 16" barrel.. Top notch machining. Threaded right into my Philly ord receiver.. GMR is my go to place for barrels on all my home built designs.. Weapons guild member.. arjacobson

  4. Perfect For A Non SBR!!!! 5 Star Review

    Posted by on 5th May 2015

    This barrel is made to WAAAY better quality and historical accuracy than the one that came on my Kahr 1927A1. Fit my original Cutts perfect and accuracy at the range was prefect!!! Great product for those that don't want to mess with the Feds but have a closer to original look!!!
    Great company to deal with as well.

  5. Great barrel to make a non-sbr thompson 5 Star Review

    Posted by on 22nd Apr 2014

    My cutts compensator fits perfectly, the fins do not match perfectly the original barrel but are significantly closer than other barrels. Oh yeah, its the only finned barrel that lets you make a non-sbr thompson!
    The chamber is a match to the original and has good rifling.