Friction fits into the back of the Brute Pro's spring retainer-plug-thing. Needs Trimming or Filing/sanding to fit! It also has a hole for the end cap screw, but its' a little too tight right now, I might need to edit it a little in the future.

Feel free to edit it if you want!

EDIT! i just sent it flying out of the spring retainer by normal blaster use! some help  editing it would be greatly appreciated! In the meantime, use it as a detachable wrench or find a way to screw it in to the retainer!