This is my Thompson M1A1 "clone." Had the rear sights riveted, had the front dowel pinned instead of a cheap roll pin, had the barrel swapped, rifle parkerized, magazine catch modified to accept USGI mags without modification, had the grip mount swapped to accept USGI foregrips without modification, and had the sharp edges smoothed out. Going from TM1 to SBR is what I did. That way I was able to shoot it until I was approved to convert it to an SBR. But, I never shot it because the barrel was embarrassing. Lol.