imku
Member
Beg to differ...I have a M&P15 PS which is a piston rifle. The DI guns have been around for 50 years and work well. The piston guns are coming of age as more and more top gun manufacturers are coming out with their new models. My gun is a year old, never has had any malfunction and I am more than satisfied with it.
The OP stated that he was looking at the M&P15 Sport or "T" tactical models. At least that's how I read it. I viewed this on YouTube and enjoyed the review of DI vs. Piston
Piston vs DI Dilemma: "The AR-15 Gas Choice" by Nutnfancy - YouTube