While I will take any valuable input, I am looking for someone who has or worked with this setup. I am running a AAC SPR/M4 can. Looking to put it on another rifle. Has anyone successfully ran in off of one of the short 51t mounts? I should think not due to the placement of the blast baffle, however it is still just a muffler. Just don't want to blow up the tube doing something ignorant. I have ran the .308 can off the shorter .223 mount with proven success. However, the SPR mount is longer. Thank you in advance for all the info.