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Theohazard · August 23, 2013, 10:53 PM

The standard US thread pattern for a 30 caliber rifle is 5/8x24. Every 300 Blackout barrel I've ever seen was threaded in 5/8x24 and all 30 caliber cans I've ever seen either come standard with this thread pattern or have it as an option for either a direct-thread or a muzzle-device mount.

And many 9mm cans have pistons or direct-thread mounts for 5/8x24 specifically used for threading onto a 300 Blackout; with subsonic loads you're not going to get quieter than a 9mm can.

August 23, 2013, 10:53 PM	#11
Theohazard Senior Member Join Date: April 19, 2012 Location: Western PA Posts: 3,829	The standard US thread pattern for a 30 caliber rifle is 5/8x24. Every 300 Blackout barrel I've ever seen was threaded in 5/8x24 and all 30 caliber cans I've ever seen either come standard with this thread pattern or have it as an option for either a direct-thread or a muzzle-device mount. And many 9mm cans have pistons or direct-thread mounts for 5/8x24 specifically used for threading onto a 300 Blackout; with subsonic loads you're not going to get quieter than a 9mm can. __________________ 0331: "Accuracy by volume."