This New AR-15 Setup Surprised Us! | Storm CAT4 & EOS Suppressor

Published on June 9, 2026
Duration: 8:32

This video reviews the US Palm KAP-4 Storm Cat 4 AR-15 rifle, highlighting its ambidextrous controls, slim handguard, and upgraded components like the Hyperfire trigger. The EOS 556 Suppressor, a 3D-printed, reduced back-pressure design from BNC USA, is also discussed. The presenters emphasize the rifle's out-of-the-box upgraded nature, making it a solid package for most users.

Quick Summary

The US Palm KAP-4 Storm Cat 4 AR-15 rifle is highlighted for its fully ambidextrous controls, slim handguard, and upgraded Hyperfire trigger. It features a semi-monolithic lock-up and incorporates 16 new patents, offering a significantly upgraded AR-15 experience right out of the box. The accompanying EOS 556 Suppressor is a 3D-printed, reduced back-pressure design from BNC USA.

Chapters

  1. 01:00Introduction to US Palm KAP-4
  2. 01:26Design and Ambidextrous Features
  3. 02:06Handguard and Heat Management
  4. 02:23EOS 556 Suppressor Details
  5. 03:07US Palm's Innovation and Patents
  6. 03:49Clint Smith Training Experience
  7. 04:08Recap and Future US Palm Products

Frequently Asked Questions

What are the key features of the US Palm KAP-4 Storm Cat 4 AR-15?

The US Palm KAP-4 Storm Cat 4 AR-15 is notable for its fully ambidextrous controls, including the charging handle and safety selector. It also features a slim handguard, a Hyperfire trigger, and a semi-monolithic lock-up between the upper receiver and handguard, offering a solid and upgraded platform out of the box.

How does the EOS 556 Suppressor perform and what are its notable characteristics?

The EOS 556 Suppressor is a 3D-printed, reduced back-pressure suppressor developed by BNC USA for US Palm. It's described as being between a K-can and a full-size suppressor in terms of length and offers compatibility with various muzzle devices due to its open hub design.

What makes the US Palm KAP-4 Storm Cat 4 innovative?

The US Palm KAP-4 Storm Cat 4 incorporates 16 new patents, setting it apart from conventional AR-15 designs. It's presented as a highly upgraded rifle straight from the manufacturer, minimizing the need for immediate aftermarket modifications.

Who manufactures the EOS 556 Suppressor that accompanies the US Palm KAP-4?

The EOS 556 Suppressor is manufactured by BNC USA, who partnered with US Palm to create a suppressor specifically designed to complement the KAP-4 rifle. This collaboration ensures a reputable and high-quality suppressor option.

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