My son built a Upper receiver with the MDWS 16" barrel for me. We put it on a lower he built with a Geissele trigger & put Leupold 3-9x40 scope on it. Got scope dialed in with JB's 95gr. TTSX. 1st group was 3 shot 1 1/4", 2nd group was 5/8" 3rd group was 7/8", & 4th group was 1 3/8". All at...