different brand uppers that may fit m&p10 lower?

[broylz]

Has anyone tried to fit any other complete upper on the smith lower? Curious if there are other options out there to get multiple uppers for my gun...

I've only been able to fund one thread that said his neighbors dpms upper wouldn't fit but he didn't press the issue enough to know why. I'm curious if the pin spacing is the same or the diameter or the thickness of the pin hole mounts for lack of a better description...

Still haven't seen any smith specific uppers and have only see 1 rifle for sale locally heap enough to use for parts and it had the dreaded split pencil barrel

I have also heard of trying to fit a dpms barrel and bcg in the smith upper but haven't seen any results...

Should I just sell mine and get an armalite to get around the proprietary stuff...

 

[Tbat]

At present if you are dealing with .308 AR's you won't be able to avoid " the proprietary stuff." There are at least 3 or 4 different mag types in use and even on models that will accept the same mags there are proprietary parts which won't fit if you try to cross brands. The AR10 world is a lot different than the AR15 world

DPMS would probably give you the best hope of what you are looking for but even DPMS has different generations which may or may not have enough compatibility for parts to interchange.

 

[copemech]

Not gonna happen, sorry!

 

[bergermeister]

Forget It!

Not gonna happen, sorry!

PROPRIETARY

 

[HYRYSC]

Well, it's easy to take the internet "facts" on face value, but I prefer to work on actual facts.

I own a M&P 10 and recently build my friend a PSA PA10 308. The upper fit on the M& 10 lower and functioned. The fit was a bit sloppy with some gap between the upper and lower, but no problem with function.

 

[yqtszhj]

Well, it's easy to take the internet "facts" on face value, but I prefer to work on actual facts.

I own a M&P 10 and recently build my friend a PSA PA10 308. The upper fit on the M& 10 lower and functioned. The fit was a bit sloppy with some gap between the upper and lower, but no problem with function.

Did you get to shoot it with the pa10 upper on it? If it does function i always like options.

 

[broylz]

Well, it's easy to take the internet "facts" on face value, but I prefer to work on actual facts.

I own a M&P 10 and recently build my friend a PSA PA10 308. The upper fit on the M& 10 lower and functioned. The fit was a bit sloppy with some gap between the upper and lower, but no problem with function.

Thank you.

 

[Tbat]

Well, it's easy to take the internet "facts" on face value, but I prefer to work on actual facts.

I own a M&P 10 and recently build my friend a PSA PA10 308. The upper fit on the M& 10 lower and functioned. The fit was a bit sloppy with some gap between the upper and lower, but no problem with function.

Some of us might not have a big enough budget or available resources for such trial and error. However, glad to hear it works. Do the areas where the upper meets the lower sit flush or is there any kind of offset?

 

[copemech]

So as I understand it does not really "fit" but it may function? Let us know just how all that works out for you!

I also understand all the DPMS pattern parts will go into the SW upper. Barrel bolt, and bolt carrier. But has not been tested in the lower last time I checked with BHW barrels.

He needs a lower to test with of last contact if anyone here cares!

 

[HYRYSC]

So as I understand it does not really "fit" but it may function? Let us know just how all that works out for you!

No need for sarcasm just because you assumed something that was not true.

It actually worked out quite well. The rifle functioned fine with no issues whatsoever with the PSA upper with the M&P 10 lower.

Like I said, there was a bit of a slop between the upper and lower, but anyone that is even vaguely familiar with AR pattern rifles knows that this is a common problem even with all of the milspec AR 15 uppers and lowers. This affects nothing at all since there is no need for an air-tight seal between the upper and lower.

Here is one such discussion.

Tbat, I understand that everyone's budget is different and am not knocking that at all. I have been there and done that. I guess my big beef is when I read folks answering someone's question with rumors and suppositions that they have read somewhere on the internet, but haven't tried themselves.

I read your answer and I feel that you were completely honest and upfront by saying that the AR10 is a lot different than the AR15 world. There are a bunch of different proprietary things out there that may or may not work and you were spot on.

However when I read the other responses that were very matter of fact that there was no way that it would work, that is what I have a problem with.

Again, this is what I tried myself and how it worked out for me in my particular case. YMMV.

 

[bergermeister]

Here sir is a 'fact' that was personally verified

Well, it's easy to take the internet "facts" on face value, but I prefer to work on actual facts.

I own a M&P 10 and recently build my friend a PSA PA10 308. The upper fit on the M& 10 lower and functioned. The fit was a bit sloppy with some gap between the upper and lower, but no problem with function.

I had hands-on access to an MP-10 and an AERO M-5 (matched upper and lower). Neither the MP-10 lower would fit onto the M-5 upper OR the M-5 lower would not fit onto the MP-10 upper.

The problem was that the holes would not align vertically and the 'deck' of both lowers (with reference to the pivot and lock pin hole centers) varied. One would have had to been filed down to fit and the other had an excessive amount of 'gap'. Neither lash-up would align the pin holes.

Could I have made them fit and function IF I HAD TO? Probably; but it would have required the judicious use of a file on the 'deck' of one and a rat-tail file to open the two pin holes on both and probably a ball pein hammer to tap the pins in.

For practical application and personal taste, my overall assessment would be that 'these two are not interchangeable'.

If there is that much fit difference with the PSA PA10 .308 (which would fit your MP-10) it would not have fit the AERO lower properly either.

Hope this helps

 

[HYRYSC]

I had hands-on access to an MP-10 and an AERO M-5 (matched upper and lower). Neither the MP-10 lower would fit onto the M-5 upper OR the M-5 lower would not fit onto the MP-10 upper.

The problem was that the holes would not align vertically and the 'deck' of both lowers (with reference to the pivot and lock pin hole centers) varied. One would have had to been filed down to fit and the other had an excessive amount of 'gap'. Neither lash-up would align the pin holes.

Could I have made them fit and function IF I HAD TO? Probably; but it would have required the judicious use of a file on the 'deck' of one and a rat-tail file to open the two pin holes on both and probably a ball pein hammer to tap the pins in.

For practical application and personal taste, my overall assessment would be that 'these two are not interchangeable'.

If there is that much fit difference with the PSA PA10 .308 (which would fit your MP-10) it would not have fit the AERO lower properly either.

Hope this helps

Good information and hands on facts.