question about larue 308 uppers

AR/M4 Beyond 5.56/.223
1

Hi everyone,
anyone know a larue upper (Predator) will ba able to mate witha CMMG lower? saw one on sale, don’t know if this gonna work?

thanks

2

I can’t answer that specifically but I can tell you that a Larue OBR will not swap with an LMT MWS. Hope this helps.

3

Thanks for the answer, save couple thousand dollars on that.:smiley:

4

An OBR/PedatAR upper should fit on an MWS lower. It fits on an SR25 lower and I was under the impression the MWS lower is SR25 spec. Is this not the case?

The cmmg lower is not SR25 spec, but is DPMS spec. So the OBR/PredatAR upper will not fit the cmmg lower.

5

What was the issue with them fitting?

6

The “lugs” in the OBR upper were too wide to fit into the LMT lower.

7

Should fit fine.

Granted the LaRue lugs/pins are going to be tighter than norm… say the SR-25 lugs/pins.

Had to use some “positive encouragement” with a brass punch and a hammer to get the LaRue lower on the KAC upper.

Vice versa KAC Lower on the LaRue upper was smooth, no tools needed.

Sorry for shitty pictures.

8

Putting a Diamond on a piece of coal. They might mate up, or you could hold out for a better lower.

9

OBR on KAC.

10

I have switched KAC, LMT, OBR upper and lowers w/o issue.