The JK Armament RPX (brand part no. JK-155RPX30-K) is a 30 caliber suppressor measuring 1.55 inches, finished in black and built from a combination of aluminum and titanium. JK Armament builds the RPX for rifle shooters running 30-caliber platforms who want a compact, lightweight can. The RPX favors shooters who want a mixed-material suppressor balancing weight and durability.

Key Specifications

• Rated for 30 caliber ammunition.
• Built from aluminum and titanium.
• Measures 1.55 inches.
• Finished in black.
• Mounts via JK’s HUB Quick Attach Taper Mount.

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? 30 caliber.

How does it mount? JK Armament’s HUB Quick Attach Taper Mount (1.375×24) — a quick-detach interface that also accepts direct thread, tri-lug, and other HUB-compatible mounts.

Buy the JK Armament RPX Suppressor

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 JK Armament‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.