Hi, I have a Smith & Wesson M&P 15-22 that came with the flash hider/supressor at the end of the threaded barrel. I want to be able to remove my barrel and tighten the nut but the plastic end cap on the hand guard rail cannot slide off the barrel without the flash hider removed. I have researched the Smith & Wesson forum and others who have the same rifle told me they had a gunsmith remove the flash hider. I just want to be able to screw on the flash hider on and off with ease. If any of you are capable of doing this for a low/reasonable price (estimate) please let me know, thank you.