Thanks MEM.
If I remember my conversations with ArmaLite, and the other research I have done, Not only is ArmaLite the odd man out, but
RRA is also, they had their own design for their barrel nut, if you want, I could see if I could find the data as to whom is whom, as far as any failure, none that I have heard.
A prime example...........ra​​​​​​iled hand guards....free float or standard
MI= Armalite, standard drop in...
LaRue...​​​​​​Free Float....SR25 and
Dpms and ArmaLite
as for the
RRA,,,,,,,n​​​​​ot sure who makes them......it all has to do with the teeth on the nut.....unless you go FreeFloat, then that is a whole new ball game.....
Not sure on
JP Enterprise....that's​​​​​ IP's area.....
Magazine​​​​​s.......​
ArmaLite​​​​​ and Noveske.....I think, they look like the same, would have to check with Noveske,
KAC.....​​​​​125.00..​...​and​
DPMS...30.00 but both the same design.
RRA, on its own......
I have a friend that owns two
RRA, I could get some more info if you need it..
Just one more addition to this,
KAC uses both designs so to speak, the uppers are like that of the ArmaLite, but it will except
DPMS mags....
and why I am at it......
Efrum---​​​​​​-huh!​---​-sounds​ like a pain killer.....but OK------MIMPlot.....​​​​​...

..

........​​​.and that goes for you too.......RE-OIL...

....LOL