So I get my brand new vbob to the range 7 loaded mags and I'm good to go. First few groupings at 15 yards perfect about 23 rounds. Start some double taps and they are all over the map looking closer my rear site is about ready to fall off. Totally loose!! Not having an Allen wrench in my bag I tried a few more rounds. Needless to say that was all she wrote for the vbob. Shot my sons 1911 .22 to salvage the trip his $350 gun was flawless. Not sure what to do just tighten it down or locktite or what??? Please help.