KAC SR25 upper compatibility to which lowers

[Idahunt]

All, I've combed Google and have not seen what I think is a definitive answer.

I'm considering getting a complete SR25 upper, what lowers are compatible?

It looks like matrix and AR10a are contenders. Does anyone know for sure? Any interesting differences/nuances?

Thanks for any info or point to a link I may have missed.

Edited August 10, 2015 by Idahunt

[guruofhotrod]

Looks like Genesis 80% lower:  http://genesiscnc.com/

and possibly Mega, - The Genesis website lists LMT,La Rue, and Les Baer as being compatible with their lower

in addition to Armalite and KAC - the do mention specifying a .281" pin size on their upper for LMT and KAC lower compatibility

Edited August 10, 2015 by guruofhotrod

[Idahunt]

Thanks guru, I looked at the Genesis but I hope to avoid getting any finish machining done. I forgot about the pin issue .281 on the sr25 upper and .277 on the "other" lowers.