AR15 lower kits interchangeable?

[BeagleBoy360]

I have an NEA stripped lower, can i install any lower kits, or should i get the NEA kit for it?

Sorry, a newb to this all.

 

[Suputin]

All AR parts are interchangeable.

 

[Stevebot-7]

Last I checked, about 95% of lower parts should be compatable with everything else, mostly supersecret propriatary parts and stuff like the large pin Colt lowers. NEA should fit everything.

 

[Travis Bickle]

Hold on now, aren't NEA Fire Control Group pins mil spec (0.155")?

Carefull because for many many years Colt was drilling their holes at 0.17" and using mounting pins and bored out sear/disconnector and hammer holes accordingly. Noone wants to say it but I'm assuming this was because they were worried about people potentially "modifying" their civilian AR's to fit M16 parts.....

Other than that though as far as I know any mil spec lower parts kit should fit. I'm no AR15 expert though.

 

[*MALICE*]

The only issue you MAY have is that the bolt catch hole on your lower MAY be oversize, and as such you MAY have issues with it falling out. To solve this, you either send the lower back and ask for a new one, or you flare the ends of the roll pin after installing it.

Other than that, any lower parts kit should fit without issues.