Okay, I spent about 5 1/2 hours at the range today. Let's see, I brought my new M&P 15, M&P 15-22, my .270, and my wifes S&W 642. I had a blast. I had my two oldest kids with me (10, 8 yoa) Shot a couple hundred rounds of .223, about 400 rounds of .22lr, and 20 rounds of .270... etc.....Also shot my friends Enfield....I sighted both the iron sights and the primary arms M3. I'm impressed with the quality of PA red dot for the price. Also the S&W 15-22 is just a blast to shoot.....First time my wife and I shot the 642. I have to say, I didn't care much for how it shoots. I was shooting +p rounds and it actually kicked a little too much for my taste..I can't imagine the scandium .357.....I will stick with my G27.