I purchased a "Thompson Barrel Wrench" off of a guy on eBay (wallycooper) as it looked like it would do the trick. The finish on the barrel was an attractive blue over machining rather than polished.įirst task was to get the old 16 inch barrel off. The barrel is fully chambered and should headspace just fine once it is installed. The barrel has 3 holes drilled down the length of the barrel rather than a single central bore. This is the feature that got this barrel approved. I wonder if these were threaded deeper to correct for a bad job on threading at the muzzle.
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Thankfully, once you get past the front sight ring, the threads improve greatly, and the set screw fits as it should. It makes removing screws a bit interesting. There was a spot about 1/4 inch from the muzzle where the set screw didnt engage the threads and jumped. On both of the barrels I have installed to date, I was dissapointed with how poorly these were threaded in the first inch. The muzzle only needed threaded deep enough such that the set screw restrictor being used would sit flush or slightly below the muzzle.
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I was surprised how deeply the thread was run - about an inch +. The muzzle of the barrel is threaded for 1/2 20 NF. The front sight is pressed on, aligned then a hole drilled to be cross pinned in place. It is simply spun on and then made tight. The Thompson barrel has a non indexed square thread. The muzzle is not externally threaded, as on the M1 and M1A1 the front sight ring was pressed on, then pinned in place. The contours are faithful to the original pattern. I'll be installing the "M1" style barrel. Here's Slash's Auto Ordnance TM1 Semi Automatic Carbine prior to the barrel swap. The M1(A1) barrel currently retails for $3 pattern barrel for $375.īeing somewhat mechanically inclined, I figured this was a piece of cake project to swap a barrel.
#Auto ordnance tm1 registration#
Installing this barrel does not necessitate a $200 tax stamp / registration of the firearm as a Short Barreled Rifle as would be required with a standard live fire barrel. Philadelphia Ordnance offers an ATF approved blank firing only 10.5 inch barrel for both the M1(A1) and 1928 Thompsons. The frame and receiver are milled from solid steel or aluminum, the wood is genuine American walnut and the overall finish is a blued steel or black anodized aluminum.Installing a Philadelphia Ordnance Blank Barrel The look and feel are authentic, right down to the side bolt action. We offer the same attention to craftsmanship today that made the original so highly regarded.
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