The Silent Steel USA Compact Streamer .45 ACP is the shorter Streamer, set up for .45 ACP with a 1.375×24 HUB-compatible mount and an Armor Black Cerakote finish (Silent Steel USA part no. CSTR-45-BLK-HUB-1_3/8). Silent Steel USA builds it around FLOW-IQ, a baffle-less turbine and filter system that cools gas in a swirling path to cut blowback and first-round pop. It measures 5.9 inches long by 1.6 inches in diameter, with a 303/304 stainless steel body, and the maker describes the Compact as a general-purpose, full-auto rated suppressor. Silent Steel USA lists the .45 ACP option as not pistol rated, so it belongs on a .45 ACP carbine or other non-pistol host. For a .45 caliber pistol-caliber carbine, it is a compact option on a modular HUB mount.

Key Specifications

• The caliber is .45 ACP, an option Silent Steel USA lists as not pistol rated.
• Length is 5.9 inches, the Compact size between the Micro Streamer and the full Streamer.
• Diameter is 1.6 inches, shared across the Streamer family.
• The body is 303/304 stainless steel, a material suited to heat and hard use.
• Gas control comes from FLOW-IQ, a baffle-less turbine and filter design that reduces blowback.
• The rear thread is 1.375×24 HUB compatible, so it accepts HUB-pattern mounting hardware.
• The finish is Armor Black Cerakote, a durable low-visibility coating.

Frequently Asked Questions

Can I run the .45 ACP Compact Streamer on a pistol? No. Silent Steel USA lists the .45 ACP option as not pistol rated, so put it on a carbine or other non-pistol host.

How does it mount? It has a 1.375×24 HUB-compatible rear thread. Silent Steel USA offers direct thread and BoltLok QD mounting options for its HUB suppressors.

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 .45 ACP Suppressor, HUB Mount, Armor Black

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.