S&W M&P10 .308 - SHOT news?

[Ryno12]

I got the standard model about a month ago. I tried installing Magpul MOE handguards and they wouldn't go on - the heat shield interferes with the humongous barrel diameter near the nut. I'm not sure if removing the heat shield will fix this, because I then tried a set of Cavalry Arms handguards (the fat M4 sized ones, I think they call them C6) and found that, with no heat shield interference, they were about 1/8" too long from interface end to end, and also may have had some issue with the diameter of the barrel nut or its proximity to another part of the delta ring assembly on this rifle.

I haven't tried any free float handguards.

If anyone bought one of these in the Magpul flavor, could you post photos of the inside of the MOE handguard, ideally next to an off the shelf MOE AR15 handguard for comparison?

Sorry, I should've specified free float. I did, however, buy a MOE for it & didn't have any issues installing it. It was a little tight at the heat shields but it still slipped over. I'd like to free float it now though.

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[Little Creek]

I got the standard model about a month ago. I tried installing Magpul MOE handguards and they wouldn't go on - the heat shield interferes with the humongous barrel diameter near the nut. I'm not sure if removing the heat shield will fix this, because I then tried a set of Cavalry Arms handguards (the fat M4 sized ones, I think they call them C6) and found that, with no heat shield interference, they were about 1/8" too long from interface end to end, and also may have had some issue with the diameter of the barrel nut or its proximity to another part of the delta ring assembly on this rifle.

I haven't tried any free float handguards.

If anyone bought one of these in the Magpul flavor, could you post photos of the inside of the MOE handguard, ideally next to an off the shelf MOE AR15 handguard for comparison?

I installed an off the shelf MOE AR15 hand guard. It was too snug for my tast. I had to force it over the barrel near the barrel nut. I took a dremel tool and shaved the ears off the top rear of the heat shield and it fit fine. One of these day's, when I get caught up, I will probably get a free float rail.

[jwfuhrman]

So what's the verdict on this then? Good starting point for a 308 SPR type build?

[Ryno12]

So what's the verdict on this then? Good starting point for a 308 SPR type build?

If by build, you mean just a furniture swap, then yeah. You'll run into issues if you want to swap barrels or BCGs. I did put an SR25 BCG in mine just for grins & it wouldn't lock up. You'd have to swap out both but it seems the jury is still out on that. Some have had issues with BCM CHs not working, in others they work fine. YMMV

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[SomeOtherGuy]

So what's the verdict on this then? Good starting point for a 308 SPR type build?

IMHO, and based on only a little shooting, this is a very good off the shelf complete .308 AR package, but it does not seem to be a good platform to modify or build on. Too many features seem to be proprietary and of limited or no compatibility with what has become the dominant .308 design for modifying (DPMS dimensions; I don't know if/how closely those match KAC SR-25 dimensions). So far, I wouldn't hesitate to recommend this if someone's going to keep it as the package that arrives. But for a SPR or precision type rifle, or if you just want to swap parts for fun, I would be thinking of the usual .308 suspects (KAC, LMT, Larue, and maybe Colt's 901, but it also has its own pattern in many ways).

[ROGOPGEAR]

Here are a couple of videos I just posted on YouTube. The first shows the M&P10 ringing steel out to 300 yards. The second shows the modification you can do to the BCM Gunfighter CH.

Ringing steel out to 300 yards

BCM Gunfighter Mod

[Koshinn]

Does the CMR work with the m&p10?

[Slippers]

Does the CMR work with the m&p10?

The current .308 CMR is too tall. Stickman mentioned that Monty will make a low version for 308s if there is enough interest.

[MCS]

A CMR world be great, something 15"+would be perfect.

[DragonDoc]

What did you use for a barrel nut wrench?