s&w mp

My S&W MP15 is for some reason shooting of to the right of my target by 4 - 5 inches at 50 yards. I'm aiming at a MTN dew can in front of a 4x3 foot brown shipping box. I made sure my rear (Magpul mbus) sight was centered on the center mark adjustment. However as I said my hits are to the right...

At the range monday I am tired of the dismal accuracy of my Beretta 92. I am in the market for an accurate 9mm pistol. I can get better groups with my S&W Shield then my Baretta. I want a good accurate 9mm. I am open to other suggestions. My main goal is nice tight groups. I have never shot...