AB Suppressor F-4 9mm 1/2x28 Direct Thread Silencer

Overview

Engineered for pistol-caliber carbines and compact suppressed builds, the F-4  delivers class-leading performance in an ultra-light, low-profile package. Built from 100% Grade 5 titanium and circumference-welded for strength, these suppressors disappear at the muzzle while providing excellent suppression for 9mm PCCs.

Key Features

• 100% Grade 5 titanium construction — lightweight and corrosion resistant
• Circumference-welded body for maximum structural integrity and longevity
• Near-zero footprint: F-4 < 5” overall length, ~4.5 oz
• Flush direct-thread mount for an all-muzzle-forward, minimalist profile 
• Fixed direct-thread mount with wrench flats for secure, repeatable installation and easy torquing
• Designed specifically for PCCs — plug-and-play on most pistol-caliber carbines
• Simple, robust design minimizes snag and visual bulk on compact platforms

Minimum Barrel Length / Use Notes

• 9mm: No minimum barrel length restriction (suitable for most PCC and pistol-length setups)
• .300 Blackout: Subsonic only — verify barrel and ammunition configuration before use

Care & Maintenance

• Allow suppressor to cool fully before handling or disassembly.
• Periodically inspect mount, baffles, and welds for erosion or damage after heavy use.
• Clean carbon and copper fouling with approved solvents and tools per manufacturer guidance; avoid harsh abrasives on titanium surfaces.
• Check mount torque and thread engagement before each session to ensure secure fit.
• Follow all local, state, and federal laws for suppressor ownership, transfer, and use.

Specifications / Attributes

• Material: Grade 5 Titanium
• Construction: Circumference-welded
• Mount Type: Fixed direct-thread (flush mount)
• Weight: ≈ 4.5 oz
• Length: F-4 < 5.0” overall (approximate)
• Intended Calibers: 9mm PCC (primary), .300 Blackout (subsonic only)
• Installation: Direct-thread with wrench flats for positive torqueing
• Use Case: PCCs, compact duty systems, low-visibility suppressed builds

SKU: f4-1/2-28
UPC: 679065311194