Hand Guard questions................

Is a type III Hand Guard to late for a 5,093,xxx Inland? I assume they are.

Was the RMC Hand Guard pictured below used by RMC or possibly Q-RMC? With the X'd O staking mark, QHMC comes to mind.
I have some of these with the same marking in a box, that I had never questioned who used them, until now.

Also how often are the B.B. marked Type III recoil Plates found?
Were these used on IBM carbines?
If so are they a little scarcer than other IBM plates?
I also have a few of these and don't recall anyone ever listing these in there parts breakdowns.
Any idea who supplied the B.B. Recoil Plates?

Thx Again Guys,
Charlie-painter777

https://www.milsurps.com/images/impo...DSC07387-1.jpg
https://www.milsurps.com/images/impo...DSC07390-1.jpg
https://www.milsurps.com/images/impo...DSC07391-1.jpg
https://www.milsurps.com/images/impo...DSC07392-1.jpg

B.B. Recoil Plate..
https://www.milsurps.com/images/impo...DSC07388-1.jpg

B.B. was Berg mfg. Co. for IBM

I have one of those Q-RMC with the Q x'ed out. I just figured, "Plans Change."

I find it interesting the the lines of the X so not go thru the Q.
Pretty cool Charlie!
Dave

Regards Inland Handguards, I can report what is in the CC newsletter 361 which examines Inland block 4897526-5549821. on Handguards it says- the block started out with usage of two rivet shallow groove handguard. The earliest report of a four rivet handguard was around 5,179,xxx. After that the two rivet was only occasionally reported. Markings on handguards include H.I. and OI