Ruger's M16 Alternative: the Select-Fire AC-556

Published on November 6, 2020
Duration: 15:08

This guide details the disassembly and reassembly process for the Ruger AC-556, emphasizing the critical step of ensuring the selector is in semi-auto mode to protect internal components. Expert instruction from Ian McCollum highlights key differences from the Mini-14, crucial for collectors and owners.

Quick Summary

The Ruger AC-556 is a select-fire variant of the Mini-14, introduced in 1979 to compete with the M16. It offered semi-auto, 3-round burst, and full-auto fire modes, often favored by police for its less 'military' appearance due to its wood stock.

Chapters

  1. 00:00Introduction to the Ruger AC-556
  2. 01:00Market Adoption and Police Use
  3. 01:36Military and International Contracts
  4. 02:35Nomenclature and Barrel Lengths
  5. 03:56Selector Switch and Burst Mechanism
  6. 05:21Disassembly and Internal Mechanics
  7. 07:01Receiver and Stock Comparison
  8. 08:25Fire Control Group Deep Dive
  9. 13:35External Features
  10. 14:07Production History and Value

Frequently Asked Questions

What is the Ruger AC-556?

The Ruger AC-556 is a select-fire variant of the Ruger Mini-14 rifle, introduced in 1979. It was designed to offer military and police forces a rifle with select-fire capabilities, aiming to compete with the M16 platform.

How does the AC-556 differ from the Mini-14?

The primary difference is the AC-556's select-fire capability (semi-auto, 3-round burst, full-auto), achieved through a more complex fire control group. The receivers and internal parts are not interchangeable between the two models.

What are the fire modes on the Ruger AC-556?

The Ruger AC-556 features a three-position selector switch allowing for semi-automatic fire, a 3-round burst mode, and fully automatic fire. The burst mechanism is non-resetting.

Why was the AC-556 popular with police agencies?

Despite its select-fire capabilities comparable to the M16, the AC-556's traditional wood stock made it appear less intimidating, contributing to its adoption by smaller police departments seeking a more conventional aesthetic.

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