SR-88A: Singapore's Final Evolution of the AR-18

Published on January 20, 2025
Duration: 15:50

This guide details the field stripping and reassembly process for the SR-88A rifle, as demonstrated by Ian McCollum. It covers the removal of the bolt carrier group, bolt, and recoil springs, emphasizing the long-stroke gas piston system and AR-18 style bolt. The process is presented with a focus on mechanical understanding, suitable for intermediate users.

Quick Summary

The SR-88A is Singapore's final evolution of the AR-18 platform, developed by Chartered Industries of Singapore (CIS). It features a robust long-stroke gas piston system, a milled aluminum lower receiver, and fires the 5.56x45mm NATO round, utilizing standard AR-15/M16 magazines. Production ran from 1990 to 2000.

Chapters

  1. 00:00Introduction to CIS and SAR-80
  2. 01:16Development of the SR-88 and SR-88A
  3. 03:10External Features and Markings
  4. 04:26Upper Receiver and Sights
  5. 05:42Furniture and Gas System
  6. 07:22Field Stripping and BCG
  7. 08:50Lower Receiver Internals
  8. 10:05Upper Receiver Disassembly
  9. 13:42Production History and Users

Frequently Asked Questions

What is the SR-88A and its origin?

The SR-88A is the final evolution of Singapore's AR-18-based rifle, developed by Chartered Industries of Singapore (CIS). It evolved from the SAR-80 and SR-88, featuring a milled aluminum lower receiver and a long-stroke gas piston system.

What are the key technical specifications of the SR-88A?

The SR-88A fires the 5.56x45mm NATO round, uses standard AR-15/M16 magazines, and features a long-stroke gas piston system with a rotating bolt. Barrel lengths vary between rifle (18.1 inches) and carbine (11.5 inches) variants.

How does the SR-88A differ from its predecessors?

The SR-88A's most significant improvement over the SR-88 was the replacement of the stamped lower receiver with a milled aluminum one, offering enhanced durability and a design conceptually similar to the FN FNC.

Who were the primary users of the SR-88A?

The primary military users of the SR-88A were Singapore and Slovenia. Slovenia's adoption was likely facilitated by existing arms contracts with CIS for other firearms.

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