The Canik VOID-556K is a 5.1-inch, 5.56 suppressor built for shooters who want rugged construction and tunable performance (Canik part no. CASU0003). It belongs to the VOID line that Canik created with Otter Creek Labs, and it is made from heat-treated 17-4 stainless steel under a high-temperature Cerakote finish. A 1.375×24 HUB-compatible interface accepts other mounts, while the included 1/2×28 direct-thread adapter installs on common 5.56 hosts. Two end caps come in the box, a solid cap and a low back pressure cap, so the same can fits a precision build or a cleaner-running semi-auto.

Key Specifications

• The caliber rating is 5.56x45mm, the cartridge Canik built the VOID-556K around.
• The minimum barrel length for 5.56x45mm is 7.5 inches, as Canik rates it.
• Overall length is 5.1 inches, short enough to keep a carbine balanced.
• Weight is 12.3 ounces, light for a stainless steel rifle suppressor.
• Diameter is 1.625 inches, a size that sets how much handguard clearance you need.
• The body is heat-treated 17-4 stainless steel, chosen for strength under heavy use.
• The finish is black high-temperature Cerakote, which protects the steel from heat and wear.
• The mounting interface is HUB compatible at 1.375×24 TPI, so it accepts HUB-pattern mounts.
• A 1/2×28 direct-thread adapter is included, which lets it mount straight to a standard 5.56 barrel thread.
• The box adds two end caps, a solid end cap and a low back pressure end cap, to balance suppression against gas blowback.

Frequently Asked Questions

Can the VOID-556K be used on 6mm ARC? Yes. Canik also rates it for 6mm ARC and similar cartridges, with a minimum barrel length of 10.5 inches. For 5.56x45mm the minimum is 7.5 inches.

What comes with the suppressor? Canik includes a 1/2×28 direct-thread adapter, a solid end cap and a low back pressure end cap.

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.

Buy the Canik VOID-556K 5.56 Suppressor, 5.1-Inch

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 Canik‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.