The Silent Steel USA BoltLok Flash Hider for 5.56/.223 (brand part no. FHAQDL-B-556-12X28) is a dual-purpose muzzle device that doubles as the quick-detach mounting point for Silent Steel USA’s BoltLok suppressor system. Threaded 1/2×28 for standard 5.56/.223 barrels, this flash hider stays on the rifle full-time, tames muzzle flash for unsuppressed shooting, and lets a compatible Silent Steel USA suppressor lock on and off in seconds without losing zero. Among our silencers and suppressed firearms, this flash hider suits 5.56/.223 shooters building toward a quick-attach suppressed setup on their existing rifle.

Key Specifications

• The caliber compatibility is 5.56 NATO/.223 Remington.
• The mounting thread is 1/2×28.
• The mount type is BoltLok, a quick-detach system for compatible Silent Steel USA suppressors.
• The primary function is a flash hider for standalone use on an unsuppressed rifle.

Frequently Asked Questions

Is this an NFA-regulated item? No. A flash hider and its quick-detach mounting hardware are standard muzzle devices, not suppressor components covered by the National Firearms Act, so it ships and transfers with no ATF paperwork.

Do I need a suppressor to use this? No, it functions as a standalone flash hider on an unsuppressed rifle, and also serves as the mount when you add a compatible BoltLok suppressor later.

Which suppressors does the BoltLok mount fit? It’s built for Silent Steel USA’s BoltLok-compatible suppressor models threaded to match this mount.

Buy the Silent Steel USA BoltLok Flash Hider

A flash hider that doubles as a quick-detach suppressor mount, the BoltLok gives 5.56/.223 shooters a direct path to fast-attach suppressed shooting. Order it from our Lubbock, Texas gun shop for fast shipping.