SA80 History: The Pre-Production XL85 and XL86

Published on May 17, 2017
Duration: 7:07

This entry details the pre-production XL85 rifle and XL86 Light Support Weapon, precursors to the British SA80. It highlights their design evolution, including improvements to the magazine well and reliability enhancements through tighter tolerances. The political context surrounding their adoption, driven by the privatization of RSAF Enfield, is also discussed. Instruction is provided by Ian McCollum, demonstrating high expertise in firearm history and manufacturing.

Quick Summary

The pre-production SA80 XL85 rifle and XL86 LSW incorporated design refinements like tighter tolerances for improved reliability and a redesigned magazine well for better feeding. The XL86 also received a bipod mount and improved flash hider. Their adoption was influenced by the privatization of RSAF Enfield, requiring a substantial production contract.

Chapters

  1. 00:00Introduction to XL85 and XL86
  2. 00:33Reliability and Tolerancing
  3. 01:31Magazine Well Redesign
  4. 02:12XL86 LSW Specific Improvements
  5. 04:17Political Context of Adoption

Frequently Asked Questions

What were the key design changes in the pre-production SA80 XL85 and XL86?

The XL85 featured a redesigned magazine well with a standalone box for better feed control, while both models saw tighter tolerances to improve reliability against dirt ingress. The XL86 LSW gained a bipod girder and heavy-duty flash hider.

Why was the SA80 adopted despite known reliability issues?

The adoption was heavily influenced by the British government's plan to privatize RSAF Enfield. A large production contract for the SA80 was needed to make the factory more attractive to potential buyers like British Aerospace.

What specific improvements were made to the XL86 Light Support Weapon?

The XL86 LSW was equipped with a girder for mounting a bipod and a more robust flash hider. These additions were intended to stabilize full-auto fire and mitigate 'split groups'.

What role did manufacturing tolerances play in the SA80's development?

Designers tightened tolerances between the receiver and bolt carrier in the XL85/XL86 prototypes. This was an attempt to prevent environmental contaminants like dirt, mud, and snow from entering the action and causing malfunctions.

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