WELCOME TO JMAC’S VAULT!

You’ve seen the parts, now see how I run them. We’re launching a brand new Video Blog series where I’m opening up my personal collection to show you the "why" behind every build, every prototype, and every scratch.

First up: My Personal AK-105. This isn't a safe queen—it’s a battle-worn machine gun with a warped receiver that has survived years of demo abuse. But even a workhorse needs precision.

Finding the perfect optic for your firearm is only half the battle. The element many shooters overlook is the cheek weld—ensuring your eyes are perfectly aligned with your optic every single time you bring the rifle up. Without a proper rise, you find yourself "hunting" for the reticle, which slows down target acquisition and kills consistency.

Introducing the CRSU: The Ultimate Adjustable Cheek Riser

The CRSU is our new adjustable cheek riser designed to give you that perfect, repeatable eye-to-optic alignment.

• Adjustability: It features three height settings (all the way up, middle, and all the way down) covering an 8-inch rise. Whether you are running a tall EOTech, an LPVO, or standard iron sights, you can dial it in exactly where you need it.
• Compatibility: The CRSU is compatible with our triangle skeleton and arm bars, bolting directly into the top holes.
• Classic Integration: Excitingly, it also works with original Bulgarian and Russian triangle stocks using a small clamping plate that allows you to slide the riser forward or backward to your preference.
• Form & Function: Machined and anodized for durability, it provides a large, comfortable surface area for your cheek while still allowing the stock to fold tightly.

The Build: The "Indestructible" AK-105

This AK-105 is one of JMAC’s original machine guns, used for years as a demo and product testing platform. Despite a warped receiver from being run over and thrown around at countless events like Kalash Bash, it still runs flawlessly

Key Components of the Build:

• MMS System: The rifle is fully decked out in our Modular Mounting System (MMS), including the AKM dust cover which is guaranteed to hold zero. The system features unique octagonal cam washers with eight positions per side, allowing you to perfectly adjust length, height, and even MOA.
• Handguards & Stops: It features the 9.56 handguard (allowing access to the cleaning rod) and the GT AKM gas tube. We’ve added our new Bakelite Tab M-LOK Handstop—a birch laminate, US-made piece that adds incredible "flavor" to the build.
• Suppression: Up front is the Banka Suppressor, a collaboration with Richmond Tactical. It’s designed specifically for the AK, offering extremely low back pressure so you don’t need an adjustable gas block or piston.
• Suppressor Mount: We used the 360HD-X37, a "bulletproof" recoil reduction device that requires no timing and provides the shortest possible setup for 24mm threads

• Control & Ergonomics:
  • RCQD: A mount that prevents hand burns on the gas block while providing a QD sling point.
  • Mag Funnel: A 5.45/5.56 funnel for lightning-fast mag insertions.
  • Crab Selector: Makes actuating the safety incredibly easy.
  • Bakalite Grip: A comfortable, stylish birch laminate grip made right here in the USA.

At JMAC Customs, we believe a firearm should be more than just a tool. Whether it’s through better ergonomics with the CRSU or a fully integrated MMS build, we’re here to help you reach the next level of performance.

Want to see more build breakdowns? Let us know in the comments.