This is a fairly dated presentation on Navy small arms. Slide 5 mentions an "M16A1HB". Never heard of this variant before. Was it some sort of special heavy barrel run for the Navy?
https://ndiastorage.blob.core.usgovc...hlin_Panel.pdf
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Senior Member
This is a fairly dated presentation on Navy small arms. Slide 5 mentions an "M16A1HB". Never heard of this variant before. Was it some sort of special heavy barrel run for the Navy?
https://ndiastorage.blob.core.usgovc...hlin_Panel.pdf
Subject Matter Expert
Up to September 2006 the Navy re-barreled quite a few M16A1s with A2 barrels and fore-grips as the A1 barrels wore out.
After October 06 they were able to keep old rifles going by swapping A1 butts with new A2 stocks and upper receivers (simplifying Navy inventory with an M16A3 -- an M16A2 with full-auto instead of 3-round burst).
Senior Member
Thanks. And I thought the USAF was king of the rebuilds.
Senior Member
There was also an original M16A1HB (Model 611) variant, though the posted document refers to the Navy refit. The original 611 came with an M60 bipod and the barrel was a true HB. This is the original configuration of the M16 I have and it's a tank.
They also made an A2 "LMG" variant but I've never handled one of those. IIRC, they may have been fielded by the Canadians?
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