You can now get an Aluminum Mac & Cheese | FREE STATE GUN CO. SAS-9

Published on September 20, 2025
Duration: 10:14

This review covers the Free State GunCo SAS-9, a machined aluminum production firearm based on the 3D-printed 'Mac & Cheese' design. It highlights the firearm's compatibility with MAC uppers and AR lower parts, its direct blowback operation, and its ability to accept Glock magazines. The review also discusses trigger compatibility, potential issues with outrunning the trigger, and recommendations for lubrication and maintenance to ensure reliability.

Quick Summary

The Free State GunCo SAS-9, nicknamed 'Mac & Cheese,' is a machined aluminum production firearm that merges a MAC upper with an AR-15 compatible lower, accepting Glock magazines. It features direct blowback operation and is known for its soft shooting characteristics due to its weight, though users should be mindful of potential trigger outrunning and ensure proper lubrication for optimal reliability.

Chapters

  1. 00:00Introduction to the SAS-9
  2. 01:01What is the SAS-9 (Mac & Cheese)?
  3. 01:41Design and Components
  4. 02:53Sponsor Break
  5. 03:22Why Choose the SAS-9?
  6. 03:52Pricing and Included Items
  7. 04:23Limited Production and Availability
  8. 04:57Lower Receiver Details
  9. 05:24MAC Upper and Direct Blowback
  10. 05:30Feed Ramps and Reliability
  11. 05:48Weight and Recoil Analysis
  12. 06:24Polymer Components and Grip
  13. 06:32Trigger Compatibility and Issues
  14. 07:33Charging Handle and Upper Options
  15. 08:06Reliability and Troubleshooting
  16. 08:38Lubrication and Maintenance Tips
  17. 09:08Ergonomic Caveat: Magazine Release
  18. 09:57Release Date and Final Thoughts

Frequently Asked Questions

What is the Free State GunCo SAS-9, also known as the 'Mac & Cheese'?

The SAS-9 is a production firearm from Free State GunCo that is a machined aluminum version of the popular 3D-printed 'Mac & Cheese' design. It combines a MAC upper receiver with an AR-15 compatible lower receiver and accepts Glock magazines.

What are the key features and compatibility of the SAS-9?

The SAS-9 features a direct blowback system, accepts AR-15 lower parts like triggers and grips, and uses Glock magazines. It's constructed with a machined aluminum lower receiver, making it a durable production firearm.

What are potential issues or considerations when using the SAS-9?

Users should be aware that the MAC upper can be 'outrun,' meaning the trigger can reset before the bolt is closed, potentially causing light strikes. Accidental magazine drops can occur if the grip interferes with the magazine release. Proper lubrication is also crucial for reliability.

How does the SAS-9 handle recoil, and what is its weight?

Despite being a 9mm, the SAS-9 is described as soft-shooting due to its direct blowback operation and the weight of its full aluminum lower receiver. It weighs about as much as an AR-15.

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