Frame Blueprint

[adlake]

Anyone have a machinist drawning of a frame on a 1921-1928 that they can post?-Adlake

[Bob B]

Here ya go.

 

http://img14.exs.cx/img14/5415/1928TriggerFramesm.jpg

[adlake]

Thank you I been working on a 1927-a1 frame to look like a 1921-1928 frame and need the info for the handgrip. Thank you again Bob-adlake

[SecondAmend]

Bob B (or other),

 

Would you happen to have a frame blueprint for a Thompson M1 lower?

[Bob B]

These drawings are marked as being for the M1A1, but there should be no significant difference for the M1 trigger frame

housing. Having said that, note that the drawings show provisions for a detachable stock, which as far as I know was

never used on the M1A1, and a profile (except for the "stepped" grip mounting) that isn't correct for the M1A1. They may be

an early (and inaccurate) revision, or just reworked 1928 drawings. The source of these? Anyone's guess, but the story goes

they were "shop drawings" used for reference in wartime production. Maybe someone more knowledgeable about the

history of Thompson design and manufacture could help clear this up.

Anyone?

 

The image quality is terrible I know, but they ARE readable - sort of.

 

http://img68.exs.cx/img68/4379/thompson_m1a1_blueprints0001.gif

 

http://img68.exs.cx/img68/3024/thompson_m1a1_blueprints0002.gif

[SecondAmend]

Bob B,

 

Thanks for your effort.

 

Clearly not an M1 print. I figured that someone who thought all Thompsons were the same took an old 28 print, whited out the 1928, and typed in M1A1, and made a second or third generation copy, hence the really poor quality. I wonder how many were sold before somebody figured out the print was totally wrong.

 

Anyone have an actual M1 (or M1A1) frame print?