Correct me if I'm wrong...
I dug this one out this morning. To me it looks like the H used by Hillerich & Bradsby. Same size H found on H.I. marked Stocks and Handguards. The cross on the H is just above half way.
Stamped H.Q. for QHMC, a Type II handguard.

2 pictures, the Type II H.Q. and a Type II marked with the H.I.

Thx,
Charlie-painter777



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