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; ATF approval on most individual eForm 4 filings now comes back in days, and trusts take a little longer. Order through Sig Sauer‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.