question about larue 308 uppers

**chef27615** · 08-30-13, 21:42

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

**George Mac** · 08-31-13, 00:04

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.

**chef27615** · 08-31-13, 00:43

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

Originally Posted by George Mac

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.

**JoshNC** · 08-31-13, 06:16

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.

**Failure2Stop** · 08-31-13, 09:34

Originally Posted by George Mac

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.

What was the issue with them fitting?

**George Mac** · 09-01-13, 00:41

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

**JaketheSnake** · 09-03-13, 13:40

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.