Carbine recoil plate, trigger housing - help id

[usmc-nav]

I have recently purchased a Winchester carbine. The recoil plate is marked (best i can see) with an I B . Any idea who this is? I tried a search but could not locate. Also, the trigger housing only has what appears to be a 6 on the left side rear and can find no other marks.
Thanks for any help you can offer.

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.

[FTD1167]

Look in the mag well for marks in Trigger housing. Where is the IB stamped on the plate?

[usmc-nav]

Alabama, the I B is on the inside right below where the recoil lug mates up. Also, I will check the magwell, thanks.

[Hercules Powder]

If the 6 is on the rear post below the lug that slides into the receiver in may be a NPM housing. If it is you would expect to find an N in the same place on the rightside. Are all 4 ears onthe lug square or are the rear ears angled?

Look for a .U. at the top of the inside rear mag well wall. Underwood usually has a flaming bomb stamped in front of the triggerguard on the bottom of the housing.

[painter777]

Sounds like BI stamped upside down.
Making it a recoil plate used by Inland.

Does your trigger housing look anything like this one?
If so, It would be a National postal Meter housing.

HTH,
Charlie-painter777