Thicc and Quiet: The Slovakian UMP

Published on August 29, 2025
Duration: 26:38

This video provides an in-depth review of the Grand Power Stribog SP45 A3, a 45 ACP submachine gun manufactured in Slovakia and imported by Global Ordinance. The presenter details the firearm's roller delay operating system, compares it to other platforms like the UMP and 300 Blackout, and discusses its performance with various ammunition types and accessories, including the Dead Air Mojave 45 suppressor. The review highlights the Stribog's aesthetics, modularity, and shooting characteristics, offering practical insights for potential buyers.

Quick Summary

The Grand Power Stribog SP45 A3 is a 45 ACP subgun from Slovakia featuring a roller delay operating system for reduced recoil. It accepts UMP-style magazines and performs well suppressed with ammunition like Sellier & Bellot, though remanufactured loads can cause issues. While slightly quieter suppressed than 300 Blackout, the latter offers better ballistics for range.

Chapters

  1. 00:58Intro & Giveaway Reminder
  2. 01:40Introducing the Grand Power Stribog SP45 A3
  3. 02:08Origin and Importation (Slovakia, Global Ordinance)
  4. 03:41Roller Delay System Explained (SP45 A3 vs SP9 A3)
  5. 04:15Field Strip & Roller Delay Mechanism
  6. 05:11Dead Air Mojave 45 Suppressor Integration
  7. 05:35Initial Shooting Impressions & Ammo Reliability
  8. 06:05Trigger Compatibility (AR-15, Geissele, Larue)
  9. 07:24Why a 45 ACP Subgun? (Cost vs 300 Blackout)
  10. 08:01Accessory Setup (Optic, Laser, Grip, Brace)
  11. 09:01Magazine Options (Grand Power vs HK UMP)
  12. 09:35Grip and Stippling
  13. 09:53Suppressed Shooting Test
  14. 10:06Sound Test: Suppressed SP45 A3
  15. 11:44Comparison: SP45 A3 vs 300 Blackout Suppressed
  16. 13:33Recoil Comparison (SP45 A3 vs Honey Badger)
  17. 15:29Bump Firing Test
  18. 15:42Steel Case Ammunition Test (Red Army Standard)
  19. 17:01Jacketed Hollow Point (Nosler) Test
  20. 18:28Reload Speed Test
  21. 20:05Bolt Release Ergonomics Discussion
  22. 20:31Shooting from the Hip Test
  23. 20:53Conclusion & Round Count
  24. 21:05Final Thoughts: Recoil, Suppressor, Comparison
  25. 22:02Future Projects (Super Safe Mode)
  26. 22:40Gripes: Ambidextrous Controls & Magazine Release
  27. 24:03Optic and Laser Setup Review
  28. 24:34Overall Impression & Future Plans
  29. 25:14Final Giveaway Reminder

Frequently Asked Questions

What is the operating system of the Grand Power Stribog SP45 A3?

The Grand Power Stribog SP45 A3 utilizes a roller delay operating system. This system uses small rollers within the bolt to delay the opening of the action, which helps manage recoil, especially in larger calibers like .45 ACP, offering a smoother shooting experience compared to direct blowback.

What ammunition types are recommended for the Grand Power Stribog SP45 A3?

The Stribog SP45 A3 performed reliably with Sellier & Bellot 45 ACP ammunition. However, remanufactured ammunition proved unreliable, causing feeding issues. It's recommended to use quality factory ammunition and avoid remanufactured loads for optimal performance and reliability.

Can the Grand Power Stribog SP45 A3 accept UMP magazines?

Yes, the Grand Power Stribog SP45 A3 is designed to accept UMP-style magazines. The video demonstrates successful use of both Grand Power's proprietary polymer 20-round magazines and surplus HK UMP law enforcement magazines in .45 ACP.

How does the Stribog SP45 A3 compare to 300 Blackout suppressed?

When suppressed, the Stribog SP45 A3 in .45 ACP is slightly quieter than a 300 Blackout. Both have similar subsonic bullet weights, but 300 Blackout offers superior ballistic coefficient for longer range. Recoil is very close, with the Stribog SP45 A3 having marginally more felt recoil.

What are the main ergonomic drawbacks of the Stribog SP45 A3?

The primary ergonomic drawbacks noted are the low-profile bolt release, which can sometimes fail to seat rounds reliably, and the magazine release, which is difficult to operate with the trigger finger. An oversized paddle for the bolt release is suggested as an aftermarket improvement.

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