I bought my new M&P 15-22 (2nd gen) two days ago for $399 and got out to the range today. Wow, what a blast!!! I shot 500 rounds of Winchester M-22 ammo with a few stove pipes...stopped by my LGS and had them help me install a $50 Truglo scope...needed 1/2" risers and new rings. Then, I went...