The Angstadt Arms Vanquish 9 16-inch FDE is an integrally suppressed AR9 barrel finished in flat dark earth (brand part no. AAVIS09BFR). Angstadt Arms built the zero-baffle suppressor into a precision ported barrel so 115-grain ammunition stays subsonic. Compared with a traditional suppressor, it runs cooler and sends less gas back toward the shooter. It fits any straight blowback AR9 and any mil-spec upper receiver, with an overall length of 16.2 inches. This is the full-length, flat dark earth barrel for an AR9 rifle build.

Key Specifications

• Caliber is 9mm, for the AR9 platform.
• The barrel is a 16-inch precision ported barrel in 4140R chrome-moly steel, a tough barrel steel.
• Twist rate is 1:10 inches, matched to the common 9mm bullet weights.
• The outer shroud is 316 stainless steel with a Flat Dark Earth Cerakote finish, the FDE version of the Vanquish 9.
• Overall length is 16.2 inches, since the suppressor is integral.
• Angstadt Arms lists the barrel as full-auto rated, made for hard use.
• It works with any straight blowback AR9 and installs like a standard barrel.

Frequently Asked Questions

Which handguard fits the 16-inch Vanquish 9? Angstadt Arms recommends its 14.8-inch Suppressor Series Handguard. The shroud has a 1.5-inch outer diameter, so the handguard needs an inner diameter that clears it.

Do I need subsonic ammunition? No. The ported barrel lets 115-grain ammunition remain subsonic, so specialty subsonic loads are not required.

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 Angstadt Arms Vanquish 9 Integrally Suppressed AR9 Barrel, 16-Inch, FDE

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 Angstadt Arms‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer. Flat dark earth, full length and quiet from the first shot.