The Sig Sauer NG556 Suppressor (brand part no. NG556QD) is a .223 REM/5.56 NATO suppressor. Sig Sauer builds it for shooters who want dependable sound suppression without unnecessary bulk. At 7.4-inch long, it favors shooters who want a compact suppression package.

Key Specifications

• Rated for .223 REM/5.56 NATO ammunition for focused sound suppression.
• Measures 7.4-inch long.
• Uses a Quick Detach mounting style.

Frequently Asked Questions

Is this an NFA item? Yes. As a suppressor, it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What caliber is it rated for? .223 REM/5.56 NATO.

Buy the Sig Sauer NG556 Suppressor, .223 REM/5.56 NATO

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through Sig Sauer‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.