The Silent Steel USA Compact Streamer 9mm suppressor is the 5.9-inch Streamer in the 9mm caliber rating, finished in Armor Black Cerakote with a HUB rear thread (Silent Steel USA part no. CSTR-9MM-BLK-HUB-1_3/8). Silent Steel USA lists the 9mm option as not pistol rated, so this one belongs on a pistol-caliber carbine or similar long gun rather than a handgun. It uses the company’s FLOW-IQ technology, a turbine and filter module in place of baffles that keeps gas out of the shooter’s face. The stainless body is 1.6 inches in diameter and the whole can comes apart for cleaning. On a 9mm carbine it adds suppression without making the gun long or awkward.

Key Specifications

• The caliber rating is 9mm, and Silent Steel USA marks this option not pistol rated, so plan it for a carbine.
• Overall length is 5.9 inches, a compact size that keeps a pistol-caliber carbine handy.
• Diameter is 1.6 inches, the same as the rest of the Streamer line.
• The body is 303/304 stainless steel, the material Silent Steel USA uses across the Streamer line for heat and wear resistance.
• The rear interface is HUB-compatible 1.375×24 threads, which accept the maker’s direct thread and BoltLok QD mounting options, with or without a flash hider.
• Inside is FLOW-IQ baffle-less technology, a turbine and filter module that swirls and cools gas to cut blowback and first-round pop.
• Silent Steel USA rates the Compact Streamer full auto, the same rating it gives the whole Streamer family.

Frequently Asked Questions

Can I use the 9mm Compact Streamer on a pistol? Silent Steel USA lists the 9mm Compact Streamer as not pistol rated. It is meant for 9mm carbines and similar long guns, not handguns.

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 Silent Steel USA Compact Streamer 9mm Suppressor, HUB Mount, Armor Black

Paired with a 9mm carbine, a compact stainless can keeps the whole setup short and easy to handle. 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 Silent Steel USA‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.