The GSL FN 5.7-22 suppressor is a 5.7x28mm can that GSL Technology describes as a classic design with superior sound reduction (brand part no. FN-5722-SUP). It is machined from 7075 aluminum, finished in hard coat anodize and weighs 5.2 ounces. A 10x1mm direct thread is built in, and a 1/2×28 adapter comes in the box for hosts with the more common thread. GSL lists 32 dB of sound reduction, which makes it a good fit for a 5.7x28mm pistol or carbine.

Key Specifications

• The caliber is 5.7x28mm, the cartridge this can is built for.
• GSL publishes a sound reduction of 32 dB.
• Length is 5.8 inches, workable on both pistols and carbines.
• Diameter is 1.25 inches, a slim pistol-can profile.
• Weight is 5.2 ounces, light enough for a handgun.
• The material is 7075 aluminum with a hard coat anodized finish.
• The mount is a 10x1mm direct thread with a 1/2×28 adapter included.

Frequently Asked Questions

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

What comes in the box? GSL lists one suppressor and one 1/2×28 adapter.

Which thread does it use? The suppressor is built with a 10x1mm direct thread, and the included adapter lets it run on 1/2×28 barrels.

Buy the GSL Technology FN 5.7-22 Suppressor, 5.7x28mm

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through GSL Technology‘s silencers and suppressors lineup and our Lubbock, Texas team will handle the transfer, and it ships fast from Lubbock to your Class 3 dealer.