Sig 550 - does it work with AR mags?

Published on August 8, 2024
Duration: 0:35

This video from Polenar Tactical demonstrates the compatibility of the Sig 550 (Stgw 90) with AR-15 pattern magazines, specifically Magpul PMAGs. The expert assessment confirms that standard PMAGs do not natively fit the Sig 550 without modifications, highlighting a key difference in their magazine well designs. The demonstration includes safe handling and live fire testing.

Quick Summary

The Sig 550 rifle, also known as the Stgw 90, does not natively work with standard AR-15 pattern magazines like Magpul PMAGs. Attempts to insert them will result in failure to lock into the magwell without specific modifications or adapters, as demonstrated by Polenar Tactical.

Chapters

  1. 00:00Introduction to Sig 550
  2. 00:05Loading and Firing Standard Mags
  3. 00:19AR-15 Magazine Compatibility Test
  4. 00:30Conclusion on Compatibility

Frequently Asked Questions

Does the Sig 550 work with AR-15 magazines?

No, the Sig 550 (Stgw 90) does not natively work with standard AR-15 pattern magazines like Magpul PMAGs. Attempts to insert them will result in failure to lock into the magwell without specific modifications or adapters.

What caliber is the Sig 550?

The Sig 550 rifle is chambered in 5.56x45mm NATO, a widely used military and civilian rifle cartridge known for its versatility and effectiveness.

What is a Magpul PMAG?

A Magpul PMAG is a proprietary polymer magazine designed for AR-15 pattern rifles. It is known for its durability and reliability, but it is not directly compatible with firearms like the Sig 550 without modifications.

What are the key differences between Sig 550 and AR-15 magazines?

The primary difference lies in their design and locking mechanisms. The Sig 550 uses a proprietary magazine system, while the AR-15 platform typically uses STANAG or PMAG designs, making them incompatible without adapters.

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