A Paintball / Gotcha foregrip with an crusader shield emblem. You will need the colors red, white and black, if you want a black grip ;-)
It works for picatinny rails, which are used at almost all magfed/Woodland paintball markers.
Print the cross 2 times.
You will need 1 Screw M4x35 and 1 nut M4 to fixate it at the rail. Thats a few cents in the home depot / construction supply market.
ATTENTION: You have to split the STL of the main body in Prusa or any other slicer with that ability and add sockets ! Without splitting it you will not be able to insert the shields and crosses.
I added a GCODE file but i dont know if this works with your printer. Maybe open it in your Slicer for a preview.