Smith & Wesson M&P10 308 WIN 18″ 20RD BLK 6 POS 811308 - $1239

Having owned this since they were released I will say there is a difference. Mostly in the way of the blasty nature of a 16 vs an 18. Specifically to the M&P, My guess is possibly bolt & barrel material. Barrel profile is different too along with the 18’s propritary flash hider. The hider is rather long and produces the tuning fork spoing when firing, so for those two reasons alone I replaced it.

The other thing playing in to the high price here is the praise the original 18” version received (YT) back in ‘14-‘15. That artificially inflated the price from the $799 I paid and the price has come down from the once near $1800 mark, but still likely should be cheaper.

Lastly, there is the arguably better ballistics of 2” of barrel, which of course can be neglible depending on the entire system’s rigidity or barrel profile alone.

All this combined along with the Smith name is my take on why there is such a disparity of price between the 16” vs and the 18” featured here.