Re: 1928 Thompson
Kinda sorta. Thompson tried the Blish lock on a 30 caliber rifle, that's true. But it was in 1917 or 18, long before the Garand tests. He found that the government 30 caliber cartridge was too strong for the lock, and the best compromise between power and reliability, that was already in the government arsenal, was the 45 ACP. So the Thompson Automatic Rifle morphed into the Thompson Sub Machine Gun.
Meddle not in the affairs of dragons, for thou art crunchy, and taste good with catsup - George of Lod, Year of Our Lord 297
I always take precautions.
Beware the Evil Bullet Fairies.