M&P15 lower receiver.

[Brun0z]

Does anybody have used a different brand of uppers on the M&P15 Sport lower receiver? Does it works well?

Just asking because my co-worker is selling at a good price, a Bushmaster AR-15 XM15 M4A3 Upper Assembly complete with everything plus handguard and carry handle.

Thanks,
Bruno

[Zartan]

Shouldn't be a problem. Meet up with your co-worker for a test fit.

[SMarquez]

Ran a psa upper on a MP sport lower. Also ran the MP15 on a Mega and JD machines lower. Don't even worry about it.

[IVth Horseman]

As long as the upper is within specifications it should run just fine.

[JDay]

As long as lowers are in spec they're all the same.

[StuckInTheP.R.O.Ca]

No problems here either with a Armilite upper.

[purer00r]

BCM and PSA have been on my m&p lower

[Surferchris1]

Aero precision upper worked fine on an M&P lower. As long as the components are from reputable companies you'll be fine.

[wild_weasel]

I built a rifle using an M&P 15 lower and DTI Light Weight Mid-Length upper. Perfect fit!

Cheers,
W-W

[RR.44]

Like all have said, should be just fine, now go get that bad boy and get to shooting!