SA80 History: L85 A1 vs A2 (and the coming A3)

Published on May 20, 2017
Duration: 18:37

This guide details the disassembly and inspection of the L85A2 rifle, focusing on the specific upgrades implemented by Heckler & Koch to address reliability issues found in the L85A1. It covers critical components like the bolt, fire control group, receiver, and gas system, emphasizing checks for wear and proper function. The information is presented with the authority of Ian McCollum, a recognized expert in historical firearms development.

Quick Summary

The L85A2 represents a significant reliability upgrade over the L85A1, addressing issues with the trigger, charging handle, magazines, bolt, and receiver. Heckler & Koch implemented systemic changes, including a pointed trigger, a brass-deflecting charging handle, steel magazines, and improved internal components, making the L85A2 a much more dependable firearm.

Chapters

  1. 00:00Introduction & HK Upgrade Contract
  2. 01:04External Comparisons: A1 vs A2
  3. 02:28Trigger and Charging Handle Redesign
  4. 03:59Internal Component Upgrades (Magazines, Gas System, Firing Pin)
  5. 06:58Bolt and Fire Control Group Enhancements
  6. 08:23Receiver and Trunnion Changes
  7. 10:10L85A3 Development and Upper Receiver
  8. 13:34Live Fire Demonstration and Optics

Frequently Asked Questions

What were the main reliability issues with the L85A1 rifle?

The L85A1 suffered from reliability problems including a flat trigger that could accumulate snow, a charging handle that didn't act as a brass deflector, weak aluminum magazines, and issues with bolt and firing pin durability. These led to a major upgrade program by Heckler & Koch.

How did the L85A2 address the L85A1's trigger and charging handle problems?

The L85A2 features a pointed trigger to prevent debris buildup and a redesigned charging handle that also functions as a brass deflector, improving ejection reliability and preventing brass from hitting the shooter.

What internal component upgrades were made to the L85A2?

Key internal upgrades include stronger steel magazines replacing aluminum ones, improved gas system parts with better finishes, a thickened firing pin to prevent breakage, and a bolt with enhanced heat treatment and a chamfered ejector hole.

What is the primary change in the L85A3 variant?

The L85A3 is mainly an upper receiver upgrade that uses deep penetration welding to prevent receiver warping. It also features a more robust, longer optics rail designed to accommodate modern optics alongside traditional ones like the SUSAT.

More Gunsmithing & DIY Videos You Might Like

More from Forgotten Weapons

View all →