The Energetic Armament Big Sixy 6mm ARC Suppressor, Flat Dark Earth is a compact 6mm centerfire can (Energetic Armament part no. EA88) finished in Flat Dark Earth high-temperature Cerakote. It is additively manufactured from DMLS Inconel 718, and the hexagonal profile adds cooling surface and gives positive grip during installation. The muzzle end carries integrated flash hider prongs and recessed anechoic geometry, so no extra parts are needed to manage flash. It indexes on any HUB-compatible mount, and the maker recommends its Project E tapered adapter. It suits tan and desert-toned builds where a black can would stand out.

Key Specifications

• The primary rating is 6mm ARC, the lead cartridge on the maker rating list.
• Maker ratings also include 5.56 NATO, 5.45×39 and 5.7×28 full-auto rated, plus 6 PRC, which widens the host list.
• Weight is 14.7 ounces, a modest load for a rifle-length can.
• Overall length is 6.7 inches, and the body measures 1.65 inches across the hex flats.
• Construction is DMLS Inconel 718, the nickel alloy used in aerospace turbine parts, chosen for heat and durability.
• The finish is Flat Dark Earth high-temperature Cerakote, the tan option next to Graphite Black.
• The rear interface is 1.375×24 HUB, and the mount is not included.

Frequently Asked Questions

How does the FDE Big Sixy differ from the Graphite Black one? The finish is the difference. Energetic Armament offers the Big Sixy in high-temperature Cerakote in either Graphite Black or Flat Dark Earth, and this listing is the Flat Dark Earth version.

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.

Does the Big Sixy include a mount? The maker lists the rear interface as 1.375×24 HUB with the mount not included, so plan on a HUB-pattern mount.

Buy the Energetic Armament Big Sixy 6mm ARC Suppressor, Flat Dark Earth

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 Energetic Armament‘s suppressor lineup and our Lubbock, Texas team will handle the transfer.