The LMT-AT ION K Compact Rifle Suppressor is the shortest suppressor in the LMT Advanced Technologies ION line, sized for 5.56 rifles and carbines and finished in Cerakote Armorer Black (LMT-AT part no. ATIONK). It adds just 5.76 inches with cap and base fitted, so it keeps handling quick on short barrels and light builds. The kit comes ready to mount with a 1/2×28 single port muzzle mount and a pre-installed 5.56mm 3-prong flash hider cap. Its laser-welded hybrid nickel and steel body is full-auto rated, and the removable base and cap let the owner service it.

Key Specifications

• The caliber rating is 5.56, so it is sized for 5.56 rifles and carbines.
• Length is 5.76 inches with cap and base, which keeps the added muzzle length short.
• Weight is 15.7 ounces with cap and base, and 12.7 ounces for the welded body alone.
• Diameter is 1.74 inches, slim enough to clear most handguards and optics.
• The body is a laser-welded hybrid of nickel and steel alloys, built for durability.
• The included mount is a 1/2×28 single port muzzle mount, paired with a pre-installed 5.56mm 3-prong flash hider cap.
• The finish is Cerakote Armorer Black, with a DLC-coated muzzle device.

Frequently Asked Questions

Is the ION K full-auto rated, and are there barrel length limits? LMT-AT lists it as full-auto rated under the SOCOM stress test protocol of 1,440 rounds, with a service life of 30,000+ rounds, and lists no barrel length restrictions.

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.

Can I service it myself? Yes. LMT-AT designs the ION series to be user-serviceable, with a removable base and cap for cleaning and maintenance.

Buy the LMT-AT ION K 5.56 Compact Rifle Suppressor, Armorer 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 LMT-AT‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer.