1st Look: B5 Modular Platform Stock & FO3 by BPT

Published on June 9, 2025
Duration: 13:20

This video provides a first look at the B5 Modular Platform Stock and the BPT FO3 holster. The B5 stock offers adjustable length of pull and comb height, addressing limitations of previous SCAR 20 stocks and providing a viable option for firearms with a 1913 backend like the Spear LT. The BPT FO3 holster is compatible with Surefire XC3 and Streamlight TLR-7 lights, featuring DCC clips for secure attachment.

Quick Summary

The B5 Modular Platform Stock offers adjustable length of pull and comb height for firearms with a 1913 Picatinny backend, improving ergonomics over fixed stocks. The BPT FO3 holster is compatible with Surefire XC3 and Streamlight TLR-7 lights, featuring secure DCC clips.

Chapters

  1. 00:00Introduction: B5 Systems & Blackpoint Tactical
  2. 00:21Blackpoint Tactical Holster & Surefire XC3 Light
  3. 01:28Mounting the Surefire XC3 Light
  4. 02:16BPT FO3 Holster by Amtac Shooting
  5. 02:26Introducing the B5 Systems Modular Platform Stock
  6. 02:30SCAR 20 Battle Rifle Overview
  7. 03:04Issues with Original SCAR 20 Folding Stock
  8. 04:03B5 Systems Modular Platform Stock Solution
  9. 04:54Stock Features: Folding & Adjustable LOP
  10. 05:21Installation Notes: Thread Locker
  11. 05:49B5 Stock Installed: Functionality Check
  12. 06:06Adjusting Stock Height and Fold
  13. 06:23QD Sling Mounts on B5 Stock
  14. 06:43Parker Mountain Machine QD Mount Critique
  15. 07:17Pre-Shooting Preparations
  16. 07:24Live Fire: Rifle Transition to Pistol
  17. 08:24Shooting Performance Analysis (First String)
  18. 09:07Second Shooting String
  19. 09:19Stock Performance Under Fire
  20. 10:00Third Shooting String & Misses
  21. 10:34Overall Shooting Impressions
  22. 10:52Stock Review: 1913 Compatibility & Spear LT
  23. 11:31Adjustable Comb Height Functionality
  24. 12:05Holster Review: Blackpoint Tactical & DCC Clips
  25. 12:21Holster Compatibility: XC3 & TLR-7
  26. 12:57Conclusion & Future Reviews

Frequently Asked Questions

What are the key features of the B5 Modular Platform Stock?

The B5 Modular Platform Stock is designed for firearms with a 1913 Picatinny backend. It offers adjustable length of pull and adjustable comb height, providing enhanced ergonomics. It also includes integrated limited rotation QD sling mount points, addressing a common issue with aftermarket SCAR accessories.

What pistol lights are compatible with the BPT FO3 holster?

The BPT FO3 holster from Amtac Shooting is designed to fit the Surefire XC3 tactical light. It is also noted to be compatible with the Streamlight TLR-7, offering versatility for users with either of these popular pistol-mounted lights.

What issues did the reviewer have with the original SCAR 20 folding stock?

The reviewer found the original SCAR 20 folding stock's hinge to be insufficiently robust for the rifle's length, causing it to snap free during movement. This instability made it suboptimal, especially when compared to the more secure and adjustable B5 Modular Platform Stock.

Why are limited rotation QD sling mounts important?

Limited rotation QD sling mounts prevent the sling from spinning 360 degrees, which is crucial for maintaining consistent weapon retention and preventing entanglement during dynamic movement or in confined spaces. Non-limited rotation mounts can be a significant ergonomic drawback.

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