Simple Easy to print Spring Spacer for the Nerf Fortnite 6-Sh hammershot foam blaster. Improves perfomance by 15-20%. Warning this is a powering increasing mod and Proper Safety Equipment and Eye Protection, etc… should be worn. (DO NOT POINT AT FACE OF PEOPLE OR LIVING THINGS!) Adult Supervision is required. The prime difficultly increases slightly, but not significantly.