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DETAILS

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.

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 (1.375×24 TPI)
  • Direct thread mount included (1x16LH)

WHAT’S INCLUDED

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

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Description

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.

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 (1.375×24 TPI)
  • Direct thread mount included (1x16LH)

WHAT’S INCLUDED

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

Additional information

BRAND

AAC

Brand

AAC

We are so back. AAC is relaunching in 2026 with an entirely new product line: new silencers, new rifles, new manufacturing, new everything. The names are coming back. The attitude is coming back. The engineering is better than it ever was. If you remember what AAC used to stand for, you’ll recognize it. The original AAC wasn’t about incremental improvement — it was about building things that made people ask “how did they do that?” That’s what we’re doing again.

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