View Full Version : 80% Thompson receivers

02-15-2007, 2:09 PM
Found this on sturm: http://www.sturmgewehr.com/webBBS/parts.cgi?read=189176

02-15-2007, 2:26 PM
I wonder how hard of a build that would be?

02-15-2007, 3:05 PM
Walk away.

There are real questions as to what 80% receivers are.

What you think is 20% left to do vs what ATF thinks may be 2 different things.

At best you've gotten a receiver needing some work.

At mid-worst you've illegally acquired a firearm w/o intervening FFL.

At worst, if you have a parts kit w/some evil parts there's SMG constructive possesion issues.

We have one Calgunner popped already for this, for another SMG type. And he had zero intent to build full-auto and was even preparing to make it SB23 compliant!

02-15-2007, 5:59 PM
+1 to what Bill said. Be very careful in this area. ATF seams to have a sliding scale on what is 80%. I've even been told by the ATF they don't believe in 80% receivers! :eek:

02-15-2007, 7:56 PM
Forget It!

The original Thompson is open bolt you would have to reengineer and totally convert to closed bolt Semi spec and have ATF approval BEFORE you make it.
Once a machinegun always a machine gun,etc.,etc.,,
A friggin waste of time.....

02-15-2007, 8:00 PM
If the 80% unit is stamped 'auto ordnance', It's probably an unfinished semi receiver. They did make semi closed-bolt Thompsons, but I'm pretty sure most of an FA parts kit would be discarded.

It's probably a lot cheaper in the end to just go and buy a completed one, and have an out of state dealer pin the mag or de-PG it for you.