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 gaged. 45 ACP. 1:16 twist, .442 bore / .452 groove diameter.
Posted by Joseph Richards on 16th Dec 2016
Great Company, Great Product. Looking forward to doing business with this company again.
Posted by Unknown 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.
Posted by Randy 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
Posted by JSS 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.
Posted by Aaron 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.