Shot peening

[MegademiC]

...

That is funny.

Staying on topic, yes, shot peening does great things, but I don't think one can quantify its value on mil-spec ar-15 receivers.

[lysander]

3/4 of that document looks more like *please waver our qc faux pas*

Normally, most of those proposals would have been addressed during testing, development, and low-rate pre-production. Unfortunately, the AR-15 was sold to the USG as a "fully developed system", and it wasn't until they started to make them in quantity, that both the Government and Colt found out it wasn't.