The Richmond Tactical RT9-SD is a premium, 9mm AR-style Pistol Caliber Carbine designed primarily for suppressed use. It is often sold as an "SD" package that includes the RT9 firearm and its proprietary RT9SG suppressor.

Key Specifications & Features

The RT9-SD is built on Richmond Tactical’s in-house billet receivers, known for tighter tolerances than standard forged parts.

• Action: Direct Blowback system.
• Caliber: 9mm (designed explicitly for Colt-pattern stick magazines).
• Barrel: Usually a 6-inch 4140 steel barrel (often sourced from Tactical Kinetics) with a 1:10 twist.
• Receivers: 7075-T6 Billet Aluminum with a flared magwell for faster reloads and a threaded pin for the bolt release.
• Trigger: Typically equipped with a premium CMC Flat-Face trigger (approx. 3.5 lb pull).
• Furniture: Includes an SB Tactical SBA3 or SBA4 pistol brace and a custom M-LOK handguard with a finger stop.
• Suppressor (Combo): The "SD" package includes the RT9SG Silencer, a 17-4 stainless steel and aluminum suppressor featuring a 6-chamber baffle system.