I am searching for an Ar10 and have narrowed it down to these two. I have seen reviews on both but no head to heads. The prices are about $70 apart which is not much. I wanted your thoughts on the two.
From what I have seen from the extensive review of the G2 Recon from James Yeager's channel, it would be the one I recommend. It survived a 5 day class of 3.5k rounds with only 2 double feeds and no cleaning. It also from what they said can take mostly AR15 parts such as grips, stocks, buffer tube , certain handguards, and triggers. It also has features of M4 feed ramps , dual ejectors, longer ejection port, and special material hardenied extractor. Those features were determined to massively increase reliability to survive the test I just mentioned. It can also hold just over 1 MOA before and after the test. When he gave it back to DPMS engineers to cut in half length wise, the engineers stated that no wear is noticeable.
The main benefit I see with M&P10 is primarily cost. It has proven itself, but the DPMS has already done that as well. Even if the price difference was greater I would still recommend the DPMS since it has so many features to have it be reliable and modular. Where as the S&W runs all proprietary parts.
M&P10 is proprietary for moving/functioning parts and the barrel. Cosmetic features are not proprietary. I have Magpul all over mine with Aimpoint PRO optic. Upgrade video I found below. Trigger as I understand can be swapped. It's also my understanding that not all AR10 platforms are plug and play. If I were doing it over again. I'd build one from scratch. Then you get what you want from step 1.