AAC 300-SD

AAC 300-SD SUPPRESSOR - PURPOSE-BUILT FOR .300 BLK SUBSONIC PERFORMANCE

The AAC 300-SD was engineered with a single mission: make .300 BLK subsonic ammunition as quiet as possible. Unlike general-purpose suppressors adapted for .300 Blackout, the 300-SD's baffle geometry is optimized specifically for the pressure signature of subsonic loads.  This delivers performance that other silencers can simply can't match. Built from 3D printed titanium for a lightweight, heat-resistant construction, it handles everything from suppressed hunting to home defense SBR builds without breaking a sweat. The 300-SD also handles supersonic .300 BLK when the mission demands it, and its two-piece modular design lets you run long for maximum suppression or short when overall length is a priority.

CAPITOL ARMORY'S OPINION

If you're running a .300 BLK host and subsonic performance is the primary goal, the 300-SD is the easy recommendation. AAC designed this can specifically around the subsonic pressure curve. The modular configuration is a useful feature. The short config keeps your setup compact, while the long config maximizes suppression. The titanium construction keeps weight low, and HUB compatibility means you're not locked into a single host. Whether you're building a dedicated subsonic SBR or want the quietest possible setup for a bolt gun, the 300-SD is worth your attention.

FEATURES

• Purpose-built for .300 BLK subsonic performance
• Rated for .300 BLK supersonic
• Two-piece modular configuration.
• Long: 8.00" / 12.2 oz, Short: 5.43" / 5.0 oz
• 1.60" diameter
• 3D printed titanium construction
• HUB compatible (1.375x24 TPI)
• Direct thread mount included (1x16LH)

WHAT'S INCLUDED

• AAC 300-SD suppressor
• AAC Blackout Flash Hider (1x16LH)
• Direct Thread Hub Mount (1x16LH)

COMPATIBILITY

• Any HUB/Bravo pattern mount
• AAC Blackout Flash Hider

WHY BUY YOUR AAC 300-SD FROM CAPITOL ARMORY?

From Form 4 to your front door, we handle every step of your purchase. NFA paperwork is all we do, and thousands of approved transfers later, we've refined it into a science. Capitol Armory guides your suppressor from approval to delivery, straight to your home with no FFL transfers, no guesswork, and no runaround.