MP E marked bolts?

AR/M4 AR Technical Discussion
1

I know MP is Magnetic Particle inspection, What does the “E” designate?

IPSC_GUY
SIERRA II ALPHA

2

are you sure it’s not a MPF… F with a line under it?

MPF is FN

3

Ahhh Upon closer inspection that is exactly what it is,

Thanks

IPSC_GUY
SIERRA II ALPHA