CQR fore grip with screw top compartment

modded a few aspects added picatinny rail bulked out. has compartment with screw cap
this has been update ast of 10-17-18 printed this modle with 80% infill the cap dis not fit so rescaled it and now its good. a hole or two do not line up currently with picatinny for 2 screws nut will line up for 1will fix at later time