Numrich moved the round button catch approx. The other "1/4inch" is the stick magazine catch.
#AUTO ORDNANCE 50 ROUND DRUM FULL#
You would have to mill out the entire inside of the upper receiver in order to fit the full auto bolt into it, (and then you would have to rebuild the lower as well, to get the FA bolt to work) this satisfied the ATF that the semi auto Tommygun was not "readily convertible" to full auto. The inside of the semi auto receiver is 1/4" off from the size of the full auto gun, so that you cannot just stick a full auto bolt into the semi receiver. The other main thing Numrich changed on the semi auto models is the "famous 1/4 inch". I have the 27A1 deluxe, with the larger top mount charging knob, while it is stiff, it is do able. He has a 2 or 3 inch piece of steel bar stock made to fit snugly inside the factory charging knob, which gives enough additional gripping area charging the gun goes from impossible to merely difficult. The addition of the firing pin spring is the main reason the semi autos take 3 men and a boy to pull the bolt back, while the full auto can be cocked with a couple fingers.Ī friend of mine has the M1 semi auto variant, and it is about physically impossible to cock the gun with the factory handle. What Numrich did, to get ATF approval was redesign the bolt & trigger group to make it a semi auto, striker fired gun. The Drum mags will work in the right model semi auto Tommygun, because they latch in differently than the stick mags. Yes, GI stick mags 20,& 30rnd won't work in the semi auto Tommygun. NO GUARANTEE this method will work for you but if you currently own an all-for-show, not-for go drum, it's worth a try. I'll need to put a lot more rounds downrange to measure the improvement but my fixes helped this drum. Not a single jam and 100 of them were 200 grain lead semi-wadcutters. I've put 250 rounds through the gun with no jams or FTFs. I'm not a gunsmith as can be seen in the photos but the thing simply works. It took me bending and filing pawls and bending one of the two feed ramps. Having purchased an Auto Ordnance 50 round lemon, I made it a goal to fix this mag.
Admittedly, the guns were well maintained as were the drums. In all the drum mag shooting I did or witnessed, I don't recall any type of jam. My ship had 25 each of 50 round drum mags and hundreds of stick mags. Each time we went to sea, I shot both off the fantail. As a Navy vet from 69 to 75, I was issued a Tommy gun or BAR every time we practiced repel boarders. Not something I want to take to the range or let people shoot. After having purchased a 1927 A1 semi-auto several years ago, I finally decided to by a NIB 50 round drum mag.
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