
These projectiles are designed to penetrate approximately one-third their caliber of armor. They differ from Armor-Piercing and Special Common projectiles in that they have no cap or hood; the windshield threads directly to the body.
Fuzing is base detonating.
Color is slate gray.
No information about functioning.
No information about hazardous components.
Nothing else to see.
OP 1664, Volume 1 - US Explosive Ordnance (1947)