The JK Armament RPX 30K .30 cal suppressor in black is the short K-size version of JK Armament’s RPX .30 caliber can (JK Armament part no. JK-155RPX30-K). It favors a short, light package, which keeps a hunting rifle or carbine handy with the suppressor on. The tube is 1.55 inches in diameter, slimmer than many .30 caliber rifle cans. Construction combines titanium and aluminum to hold weight down without giving up strength where it counts. It suits hunters and carbine shooters who would rather carry a short can than the longest, quietest one.

Key Specifications

• Caliber is .30 caliber, for common .30 caliber rifle cartridges.
• The format is the K size, which keeps overall length and weight down.
• Diameter is 1.55 inches, a slim tube for a .30 caliber suppressor.
• Construction is titanium and aluminum, a pairing that balances strength and weight.
• The finish is black, matching most rifles.

Frequently Asked Questions

What does the K in RPX 30K mean? It marks the short K-size version of the RPX .30 caliber suppressor, built to keep length and weight down.

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 JK Armament RPX 30K Suppressor, .30 Cal, Black

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 JK Armament‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.