I have a project in mind and would like to submit the idea for the knowledgeable to weigh in with recommendations. The need to shorten the OAL of my primary rifle with it's attached suppressor is driving this project, and I am not willing to buy into another system right now. After researching the legalities involved I have determined that I will be on the good side of the ATF with my proposal since the manufacturer and serial number will not be affected or defaced in the process. Also, since it does not "add" to the overall dimensions or material of the can; my understanding is that I should be GTG. If anyone with direct info to the contrary has input, please post it. Essentially I am starting with a standard YHM Phantom 556 steel can. As you can see from the patent drawing, I want to use a lathe to cut at the red lines, remove the final baffle, then re weld the end cap in place. The drawing shows a thread on 762 YHM can, but the relevant portions of the 556 can is essentially the same except scaled for the smaller round. By my measurements This project will reduce the overall length of the can about 1.5 inches. In so far as the design of the baffle stack, I am currently unsure if it is welded to the sleeve, or to the inner washers or a combination of the two or neither. It may be necessary to grind/cut out the final baffle. A suitable jig to re weld the end cap will be necessary to ensure alignment. I am not necessarily against re cutting the end cap port to regain a concentric bore path as long as the adjustment is minimal. I have a fair bit of experience with TIG welding as a hobby, but the last time I touched a lathe would have been in high school. Any input is appreciated.