The more I read the more I find out the M&P 10 has a proprietary bolt/carrier group, barrel nut, and now I'm finding out the barrel is also proprietary. I was hoping to buy something that would be more DPMS compatible for availability of spare parts. ie, bolt, firing pin, carrier group, barrels, etc. I'm finding this isn't the case. Is this a deal breaker in your opinion?

I've got a deposit down on a M&P 10 right now and am starting to second guess myself. Any input is appreciated. c good