Re: 1928 Thompson
Blish lock, bolt apart
Blish lock, bolt together
Blish lock by itself, taken off the bolt.
Good article explaining the theory. You want about 1/4 of the way down the page. Sunday, August 22. The Blish Lock.
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.