Griffin Silencer GP5 5.56 Direct Thread Suppressor

The Griffin Armament GP5 5.56 direct thread suppressor is a lightweight, general-purpose sound moderator built for shooters who want effective noise reduction without breaking the bank or weighing down their rifle. Constructed entirely from 17-4 stainless steel and finished in Cerakote, the GP5 delivers durability and corrosion resistance in a compact package that handles everything from subsonic target loads to full-power 5.56 NATO rounds. It's an excellent choice for precision rifle hunters, 3-gun competitors, and shooters simply looking to protect their hearing on the range.

What makes the GP5 stand out in the direct-thread suppressor market is Griffin's patented baffle technology, which keeps sound signature down to 31 dB attenuation while maintaining the lightweight, affordable approach the GP series is known for. The suppressor comes pre-drilled with a .125-inch hole, allowing you to pin it to a barrel and create a permanent assembly (one NFA stamp)—a smart move if you're building a short-barreled upper or want a no-fuss configuration. At just 12.5 ounces and 6.25 inches in overall length, it won't throw off your rifle's balance or get in the way of optics and rail systems.

The 1/2x28 TPI direct-thread attachment is the industry standard for 5.56 platforms, so installation is straightforward on most AR-15 uppers and modern 5.56 rifles. Wrench flats on both the front and rear housing give you options for disassembly and maintenance, and the suppressor is rated for full-auto fire, so it'll handle whatever you throw at it—from precision bolt-action builds to SBR upper receivers. If you're after genuine noise reduction without the weight penalty or the price tag of premium alternatives, the GP5 is a no-compromise option.

Key Features

• 17-4 stainless steel construction with Cerakote finish for durability and corrosion resistance
• Patented baffle technology delivers 31 dB sound attenuation
• Lightweight at 12.5 ounces with compact 6.25-inch length
• Direct thread 1/2x28 TPI attachment compatible with standard 5.56 barrels
• Pre-drilled for pinning to create a permanent, single-stamp assembly
• Front and rear wrench flats for easy maintenance and versatile mounting
• Full-auto rated for any shooting platform
• Minimal length added (4.8 inches versus an A2 compensator)

Specifications

Frequently Asked Questions

Will the GP5 fit my 5.56 AR-15?

Yes. The GP5 uses a 1/2x28 TPI direct-thread attachment, which is the standard for 5.56 NATO barrels. Installation is straightforward—simply thread it onto your muzzle.

Can I pin the GP5 to my barrel?

Yes. The suppressor comes pre-drilled with a .125-inch hole for pinning, allowing you to create a permanent assembly with a single NFA stamp. The minimum barrel length for pinning is 10.5 inches.

Is the GP5 rated for full-auto fire?

Yes, the GP5 is full-auto rated, so it will handle any shooting platform from precision bolt-action rifles to short-barreled rifle uppers and select-fire weapons.

How much noise reduction does the GP5 provide?

The GP5 delivers 31 dB of sound attenuation, thanks to Griffin's patented baffle technology. This provides meaningful hearing protection and is typical for a direct-thread .22-caliber suppressor in this class.