M2 parts in M1?

[INLAND44]

I am not sure what Inland44's definition of all the significant M2 parts is, but some of the late Winchester M1 carbines had all the following parts:

M2 trigger housing, M2 sear, M2 slide, M2 stock, round bolt, and M2 mag catch. That combination shouldn't be a problem. I suspect some of the late M1 Inlands also had the same combination.

Having only a M2 trigger housing and M2 slide without access to the rest of the parts shouldn't be a problem.

The problems with the BATF "regulations" is that they are sometimes subject to interpretation by the particular agent. The same "rules" don't always apply to all weapons. Simply putting a M16 bolt carrier in a AR-15 is usually viewed as intent to construct a machine gun, even though that part may be incompatable with all the other parts in the lower and upper.

To extend upon on what Inland44 stated. You can't even have access to all the parts. If you have some of the parts and give some of the parts to your neighbor to store in his garage, you have access and a possible trip to the pen. It isn't worth pushing the envelope on this one.

It's not MY definition, its THEIR definition. Look it up. I didn't say because I wasn't sure I'd remember which were significant and which weren't. On a matter like this, you would not bet your next ten tears on anybody's opinion anyway. You're going to need to get that from an official source like Brian linked.