Barrel Thread Guides /

Barrel Thread Guides

Barrel Thread Specifications for mounting Surefire muzzle devices and suppressors.

Thread Specs	Major Ø	Pitch Ø	Minor Ø
1/2-28 UNEF-2A (MODIFIED)	.4989 / .4924	.4757 / .4737 (MOD)	.4563 MAX	Download Barrel Thread Guide
5/8-24 UNEF-2A (MODIFIED)	.6238 / .6166	.5967 / .5947 (MOD)	.5742 MAX	Download Barrel Thread Guide
3/4-24 UNS (MODIFIED)	.7488 / .7419	.7217 / .7197 (MOD)	.6992 MAX	Download Barrel Thread Guide