Which lowers are CMP legal?

[barretcreek]

Local dealer has some AR-15 lowers which are extra heavy duty. Milled from block of aluminum. Are those legal for CMP competition? I looked in the CMP manual and wasn't sure if "service rifle or commercial equivalent" means the lower must have all the same external dimensions and radii as an M16 variant.

[Ltdave]

yeah, i think they need to be the same as the issue rifle...

ive got a Mega lower with a "checkered" pad on the front of the mag well and i was told THAT makes it illegal....

[Devil Dog]

I have a DPMS lower that is steel (I think stainless). Would this gun be illegal?

[Ltdave]

the material or finish on the receiver doesnt affect legality...

the measurements and configuration do though...

[BigMo]

Yes- it must have the same external dimensions to be a Service rifle.

[PhillipM]

It doesn't matter unless you win. ;)

[Former Cav]

It doesn't matter unless you win

I've found this to be true.