Are DPMS and RRA ar15 uppers/lowers compatible?

[Dantrom]

I looking at a RRA 458 socom upper for my DPMS lower.
Will it fit?

Thanks guys!

Dan

 

[kvwpwr]

Re: Are DPMS and RRA ar15 uppers/lowers compatible?

Yes

 

[Nachtadler]

Re: Are DPMS and RRA ar15 uppers/lowers compatible?

Any AR 15 upper fits with any AR 15 lower. AR 10 rifles are the ones that follow two different specifications.