Teardown of M557 Point-Detonating Fuze 75mm to 203mm

This is the American M557, a High-Explosive (HE), centrifugally armed, Point-Detonating Super-Quick (PDSQ) Impact (IMP) or Delay (DLY) fired, projectile fuze.

The M557 is a selective Point-Detonating Super-Quick (PDSQ) impact or 0.05-second delay impact fuze designed for use with projectiles and mortars.

The M557 is one of the most widely used of all NATO fuzes, as it is used with ammunition fired from guns of virtually all standard calibers as well as with 4.2 in mortars.

Some Russian ammunition has been modified to accept the M557, in which role it is known as the AU-10.

The M557 is widely manufactured outside its home nation of the USA and is a NATO standard fuze.

The M557 fuze consists of the M48A3 fuze assembled with the M125A1 booster.

The fuze PD head assembly contains a firing pin held in position by a firing pin support which prevents initiation of Detonator M24 until impact.

So I've always wondered what exactly happens to set off the explosive? Is there like a spring that gets depressed when it hits

I mean some of the things I e saw him use on this channel are definitely illegal but i say good for you sur! Keep it up because this should be what was/is taught in our science classes all over the world lol

Imagine North-Koreans making artillery shells… what can go wrong?

ASMR😌

So much engineering for a boom

Thank you. So are soldiers in the field needing to assemble the fuse to the round or are they shipped to the field ready to go?