Use 2 m4 40-60 mm bolts with wing nuts. Glue camera base plate with fins pointing in direction of shooting. 1 barrel mount 1 camera base super glue 2 m4 40mm bolts 2 m4 wing nuts print 100% fill and flow 210 degrees c 70 mm/s print speed Slip over muzzle and position according to personal preference for weight distribution then seat firmly with wing nuts.