It’s a knife, but for your gun…
Ah the old reliable Bayonet, Rifle, M7. The most common M16/AR15/M4-series pigsticker there is with literally “millions and millions sold” to borrow a phrase from the burger joint.
The two shown are GI surplus BOC-marked weapons denoting they were made by the Bauer Ordnance Co of Detriot, Michigan, who was the most prolific M7 maker of the Vietnam-era, filling an order for 1,835,392 in FY1969 according to noted bayonet authority Gary Cunningham.
For those curious, the specs on the M7– which is still in current military use though is supplemented by the M9 (by the Army since 1989) and OKC-3S (by the Marines since 2003)– are a 6.75-inch blade length, 11.875-inch overall length, and a .880-inch/22.4mm muzzle ring diameter to be able to clear the standard NATO 22mm rifle grenade attachment.
The PVH code on the standard green M8A1 scabbards these bayos came with means they were among the 4 million made by the Pennsylvania Working Home for the Blind between 1965-1970 for Vietnam-era M7s.
The rifles, of course, are a couple of my PSA builds, which are not Vietnam-era, lol.
More on picking out a bayo of your own for your black rifle in my column at Tac44.com.