Or Projector, Infantry, Anti-Tank. Britt "bazooka" a huge spring loaded tube that partially propelled the rocket, and also detonated the rocket motor. This pic is from before I got the monopod from Canada. The Britts said the recoil was horrendous and ferocious. It took guts to fire one, let alone be close enough to German armour to actually deploy this 37 pound bomb chucker! Got it this year, for my personal museum.