Modifying the USGI trigger housing would be for aesthetics only correct? I have also filed a form1 to SBR my Kahr - had not considered redoing a triggger housing for it tho....Seen a forum where people rewelded thompson receivers to semi auto specs, but involves a ton of work that seems too much for what it is.
Another route to go is get a doug Richardson semiauto receiver. His are made to all same specs and dementions as the original ones, and think uses the kahr semi auto bolt and trigger parts in a usgi trigger housing(to be legal must work in closed bolt config).
I myself plan to sbr my auto ordnance thompson m1, and modify a usgi m1 trigger housing and stock set to it eventually.
Only usable parts in the fire control group would be trigger, mag catch, and I think the safety. Would need to widen groove where original sear ect went, to fit new semiauto parts.So - I am curious - how do builders of semi autos on a GI receiver deal with the required dimension changes inside ? Does a regular FA bolt fit too ? Fire control being closed bolt would seem to be a problem using the original parts ? I have several receiver parts sets and parts - if there is a cheap easy way to use them for something that would be great......
How often are USGI Thompson kits turned into semi-auto SBR's? Are semi-receivers available? How hard are they to put together? Thanks for your time!
PM inbound soon. This is exactly the type of project I was looking at.ive got a semi conversion out in 1928a1 & m1a1 & m1's....
its been done several hundreds of times on the various forums since i made it public. ive done over 200+ conversions for people as well.
the work itself is NOT hard. its just time consuming. it uses all US compliant parts (ar stuff inside) & is super reliable.
the good, bad & true of it all?
its exact weight, feel, look & passes EVERY test the ATF has. INCLUDING hammer follow thru & runaway tests. still uses all original parts & off the shelf parts you can get everyday to maintain this thing for ever. runs ANY ammo. steel, brass... it just doesnt care.
i came up with this when the kits were everywhere & they were cheap. which meant you could do your own Tommy for LESS than the $1200 semi garbage guns that you can buy every day of the week. .. so "we" ate up the kit supply in a hurry & now they are pretty pricey.
well if you just want to buy a semi tommy? its cheaper to get the $1200 version now days & not have to do the work, BUT they dont feel the same as a real tommy & arent a real tommy. they arent even close. & they look ridiculous with that 16" barrel + compensator giving them the anteater look.
heres a quick couple of pix & any of the guys here can point you to my build threads on how to do these ( i no longer do conversion jobs... just no time for it.)
below is a 28 with a modified 16" barrel instead of the SBR which is exactly the same other than the stamp..
and then the m1a1 in pistol set up to avoid the stamp... again function is exactly the same.
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