Novox Research X-SD Ported Barrel & Muzzle Adapter Kit – 4.3″ – 9mm – HUB/Alpha Suppressor Mount – Black

Turn a Standard Blowback AR9 Into a Modular SD-Style Suppressor Host

Features

• 4.3″ ported 9mm barrel with a 1:10 twist rate
• Ported barrel system is designed to reduce projectile velocity before the suppressor
• Designed for compatible traditional blowback AR9 uppers using standard AR-pattern barrel and barrel-nut dimensions
• Includes both 1.375×24 Bravo/HUB and 1.125×28 Alpha suppressor mounting modules
• Integrated taper interface seals the barrel and shroud assembly without an O-ring
• Can function without a suppressor as a forward-blast diffuser and linear compensator
• Shroud assembly measures approximately 5.2″ from the receiver face with the HUB module or 4.92″ with the Alpha module
• Current-production tube is Rocksett-bonded to the taper adapter from the factory
• Black nitride finish

The Novox Research X-SD replaces a standard AR9 barrel with a 4.3″ ported barrel and integrated shroud system designed around SD-style suppressed operation. Gas is vented through the barrel ports before the projectile exits, reducing velocity while the included Alpha and HUB modules allow the system to accept a broad range of compatible 9mm suppressors. Its modular mounting system avoids locking the build into a single suppressor thread standard.

Note: Suppressor is not included. The barrel-to-taper-adapter threads are proprietary and are not M18. Verify barrel nut and handguard clearance before installation; Novox specifies a maximum barrel-nut length of 2.24″ and an assembled outside diameter up to 1.27″ with the Alpha module or 1.5″ with the HUB module. This 4.3″ barrel may create an NFA-regulated short-barreled rifle when installed in certain stocked firearm configurations.

Specifications

• Brand: Novox Research
• Model: X-SD
• MPN: XSD
• Caliber: 9mm
• Barrel Length: 4.3″
• Twist Rate: 1:10
• Barrel Type: Ported
• Platform: Traditional blowback AR9
• Suppressor Mount Threads: 1.375×24 HUB / Bravo and 1.125×28 Alpha
• Assembled Length from Receiver Face: 5.2″ with HUB module / 4.92″ with Alpha module
• Maximum Barrel Nut Length: 2.24″
• Maximum Outside Diameter: 1.5″ with HUB module / 1.27″ with Alpha module
• Finish: Nitride
• Color: Black

What’s Included

• 1x Novox Research X-SD 4.3″ Ported 9mm Barrel
• 1x X-SD Taper Adapter and Tube Assembly
• 1x 1.375×24 Bravo/HUB Module
• 1x 1.125×28 Alpha Module