The Dead Air Sandman X KeyMo Black is a compact, hard-use .30 caliber suppressor built from Haynes 282 with additive manufacturing and rated up to .300 RUM (Dead Air part no. SMXKMBLK). It is the KeyMo-mount configuration, measuring 6.9 inches and weighing 16.8 ounces, and it carries a quick-detach KeyMo adapter. Dead Air describes the Sandman X as an evolution of its Sandman line, rated full-auto with no barrel restrictions. The black high-temperature Cerakote suits a duty or hunting rifle.

Key Specifications

• The caliber rating is up to .300 RUM, so one can covers 5.56 through magnum rifles.
• The energy rating is 4200 ft-lbs, Dead Air’s published ceiling for the Sandman X.
• The bore is .30 caliber, sized for .30 caliber and smaller bullets.
• Length is 6.9 inches, compact for a .300 RUM-rated can.
• Diameter is 1.65 inches, a figure to check against handguard clearance.
• Weight is 16.8 ounces, as configured with the KeyMo mount.
• The material is Haynes 282, a high-temperature alloy that is 3D-printed in one piece.
• The mount is a KeyMo adapter, Dead Air’s quick-detach system for repeatable return to zero.
• The included flash hider is a 5/8-24 KeyMicro 3-prong, ready for common .30 caliber barrel threads.
• The finish is black high-temperature Cerakote, a coating that resists heat and wear.

Frequently Asked Questions

What comes with the Sandman X KeyMo? The box includes the KeyMo adapter, a 5/8-24 KeyMicro 3-prong flash hider and a TL tool pack.

What are the caliber and barrel limits? Dead Air rates it up to .300 RUM with a 4200 ft-lb energy ceiling, lists no barrel restrictions and shows it as full-auto rated.

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 Dead Air Sandman X KeyMo Suppressor, .30 Caliber, Black Cerakote

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 Dead Air‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer. The KeyMo mount makes it quick to share between rifles.