steelwire from a coathanger + any fitting bag full of bullets,gravel,etc._ keep the rifle upright, and form two hooks at both ends of the steelwire_ properly bind the steelwire in a fashion that can''t contact the triggerguard,buttstock,etc, but the trigger ONLY_ clip the upper hook to the trigger, the other hook to the bag_ add bullets until the trigger will be activated_ weight all : bag+bullets+steelwire in your (kitchen) scale_