The Chaos Gear Supply SCI-SIX 5.56mm Inconel suppressor is a centerfire rifle can for semi-automatic and automatic 5.56x45mm hosts (CGS part no. CGS-SCISIX). CGS lists no barrel length restriction, so it can sit on a short carbine as readily as a full-length rifle. The can mounts with a flash hider mount that threads left-hand into the suppressor body, and that mount is included. The main body is 718 Inconel made by additive manufacturing (DMLS 3D printing), weighing 17 ounces on its own and 19.6 ounces with the mount. It suits a duty or hard-use AR that sees a lot of fire.

Key Specifications

• The caliber rating is 5.56x45mm, for semi-automatic and automatic host weapons.
• There is no barrel length restriction, according to CGS.
• Length is 6.5 inches with the mount installed, short enough to keep a carbine handy.
• Primary diameter is 1.64 inches, the CGS-published figure.
• Weight is 17 ounces for the suppressor alone.
• Total system weight is 19.6 ounces with the included flash hider mount.
• The main body is 718 Inconel, a nickel alloy that holds up to heat under sustained fire.
• Construction is additive manufactured (DMLS 3D printing).
• The mount is a flash hider mount that threads left-hand into the suppressor body, and it is included.
• The included mount adds 1.125 inches to the length.

Frequently Asked Questions

How does the SCI-SIX attach? It mounts with the included flash hider mount, which threads left-hand into the suppressor body.

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.

Is there a barrel length limit? No. CGS lists the SCI-SIX for semi-automatic and automatic 5.56x45mm hosts with no barrel length restriction.

Buy the Chaos Gear Supply SCI-SIX 5.56mm Inconel Suppressor

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 Chaos Gear Supply‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer and it ships fast to your Class 3 dealer. An Inconel 5.56 can with no barrel limit belongs on a rifle that gets used hard.