Factory parts off a stainless classic .375 H&H. The triggerguard is stainless, not aluminum - and is believed to be a Williams factory fit.
The floorplate is stainless too, no aluminum whatsoever here.
These could be modified for your M40A1 build, although they are stainless and would need coated with something.
No spring or follower included, just what you see here.
SOLD PENDING FUNDS $125 shipped, or trades.
P-Pal ok, otherwise USPS money orders.