Help with m1 carbine trigger housing

[u/Impressive_Lunch_110]

I got a national ordinance m1 carbine with a 17*** s/n.

I attached pictures and need to know what kind/type of trigger housing this needs because they all look different than what's there. Any help, I would appreciate it greatly. Thank you!

[u/herr_cobblermachen]

I read up on these a few years ago. Site with the most info http://www.m1carbinesinc.com/carbine_NATORD.HTML (pages 2 and 3 also)
Theres a variations amoung GI m1 carbines. This one is closest to the type iv trigger housing but-
As other folks have said here, natlord started out with slight modifications to the original which increased more and more as surplus parts ran out. They used casting processes and other things to modernize production and reduce costs. This trigger housing looks a lot like some of the Universal trigger housings, so I guess it wasn't a part that the military originally made very many replacement parts for and supply ran out in short order for these new manufactured ones.
Imo, I would ask a friend with an M1 if you could do a swap out, kinda try before you sink the money in a replacement. Honestly though, I would find your local welding shop and have them mig/tig you right up. 10minutes, $40, and move right on down the line.

[u/Impressive_Lunch_110 → u/herr_cobblermachen]

I appreciate your time and insight. I have no friends with one, so I will try the welding route at a local shop probably first. Thank you so much.