Canada Ammo - Large NEA parts shipment has arrived.

[calgaryrockstar]

i shoot surplus corrosive 762 out of my nea pdw 7.5". first, my nea has been awesome! don't be scared of surplus 762. i clean it in my pdw after every session, but it is not that dirty as i was told it would be. but perhaps because my barrel is 7.5" and everything gets blown out.

[xdmer]

Yes. If you're shooting surplus ammo with hard primers, you may want to swap out the standard hammer spring for a heavy hammer spring.

This is probably a dumb question but does a standard ar-15 lower receiver work with a 7.62x39mm upper? Or do I need a different lower?

[MJS]

Yes. If you're shooting surplus ammo with hard primers, you may want to swap out the standard hammer spring for a heavy hammer spring.

+1 for the heavy hammer spring,when I first started shooting my x39 AR every other round was a misfire cause of the hard primers.

[Randomized]

so I don't have to switch out lower receivers? Will a heavier hammer spring affect it when I switch back to 5.56/.223 upper?

[MJS]

so I don't have to switch out lower receivers? Will a heavier hammer spring affect it when I switch back to 5.56/.223 upper?

I never have and have had no issues.

That said I only ran maybe a dozen mags through mine then just build up one of my other lowers as a dedicated 5.56 rifle and left this one as a 7.62x39

[xdmer]

No you don't have to switch lowers and having a heavy hammer spring will only make your trigger pull a little heavier. No need to be swapping springs in and out.

so I don't have to switch out lower receivers? Will a heavier hammer spring affect it when I switch back to 5.56/.223 upper?