Utilizing my trusty files and dremel I removed some of the extra metal while maintaining the round profile. I started threading my barrel with the die but didn't like how much pressure was put on the die removing as much metal was required to thread the. Used lathe to create a TAT out of aluminum which was rather interesting as the aluminum did not like threading on the lathe very cleanly, but no worries since the 5/8"-24 die cleaned it up nicely. Bored the brake out on a lathe increasing the diameter from the 14mm left hand thread and tapped the brake for 5/8"-24. I finally completed the modification of an AMD-65 Brake and attached it to my S308. The extra FPS is nice, but the target is likely to be just as dead hit from a 308 round out of a 18 inch barrel as a 21.8 inch barrel. Anyhow, try dummying it up and see how it feels. Ended up cutting exactly 4 inches from the barrel for a 17.8" length. I originally was going to keep the full-length barrel too, but I dummied up the extra weight of the brake by taping a few 308 rounds out to the end of the barrel. 2-3 ounces close to your body is scarcely felt 2-3 ounces dangling out there over 40 inches from the body will definitely be noticed. The muzzle brake, even weighing little as it does, is likely to significantly increase that unpleasant front heaviness. I don't care for the extra front end weight however. I plan on re-crowning the barrel and as soon as I can buy the cutter, maybe I'll shorten after that, but for the last 5 years the rifle has served me well at the current length. The Collapsible stock helps shorten the OAL and allow for better maneuverability. Edited Maby Jim DigrizĬonsidered cutting, but I prefer the extra length and few extra fps. I cut mine to 18" and find it to be just about perfect. I don't really know what a Big Chubby is.ĮDITED TO ADD: Have you considered cutting the barrel down? Not very wieldy with all that extra length and weight out there. I recommend saving for a Battlecomp for your future purchase. After you are done, I'd love to hear the report.
Well, as long as you are modifying the $10 brake to the 5/8x24 threads, and not the rifle to the M14x1L, it's an experiment that costs nearly nothing to try. As funds permit I plan to upgrade to either an FSC30 or Big Chubby.
While they are M14x1L thread I don't think there would be any issue moddifying it to 5/8"x24R, which is what I plan on threading my barrel to. Like most in todays economy I am cash starved and need to utilize my funds wisely. Anyone install an AMD-65 style brake on their 308? Any thoughts on the AMD brake? As I have not shot an AMD, how effective of a brake are they? I am in the process of finalizing the front end of my 308.
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