45 acp blank 10 inch barrel adapter hole size

Does anyone know what is the adapter hole size for a 45 ACP blank adapter for a 10 inch barrel?

It depends on the blanks you intend to use and the weight of the bolt.

I have a couple of Thompsons that run on very hot loads (Swanson or ISS FF blanks), because they have a heavy bolt, and it's preferable to have a high rate of fire and big muzzle flash in movies.

If these were for reenacting purposes you'd probably want a more realistic rate of fire and a load that wouldn't potentially damage the gun with extensive use, Atlantic Wall SMG blanks for example.

Also, is your blank firer an adapted real gun, or a BFONG with some parts that are not quite as sturdy of manufacture?

The blank firing barrels I bought, replaced out the original barrels, and come with three BFA's with different sized orifices. '
The M1 Thompson is a solid lump and I don't really worry about it rattling to pieces, also this one is a dealer sample gun, so not the same value as a transferable piece.

https://i.servimg.com/u/f29/19/77/13/69/louis_10.jpg



My MP44 is an original Haenel 1944 (about $30K) - so I run the Atlantic Wall Reenactor blanks in it, which are very gentle and make a small muzzle flash.

https://i.servimg.com/u/f29/19/77/13/69/oua74r10.jpg



This is my 1943 MP40 also an original, we run Atlantic Wall Reenactor blanks with this so that it doesn't destroy the gun. We did break the ejector on this gun on this show, about thirty minutes prior to this still image. But I think this was because the one piece FBP bolt and ejector I run in it had simple become beat up over time.

https://i.servimg.com/u/f29/19/77/13/69/mqdefa10.jpg