JMac Customs RAS (Rapid Adjustable Stock)
The RAS (Rapid Adjustable Stock) is engineered for shooters who demand speed, precision, and ergonomics in their firearm setup. Designed for use with platforms featuring a 1913 rear interface, this innovative stock provides rapid, tool-free adjustability for length and cheek weld, ensuring a perfect fit for any situation or optic setup.

Key Features:

1. Rapid Adjustability Without Tools:

   • Quickly adjust stock length from 6" to 10" with a simple button mechanism.

   • Cheek riser adjusts up to 1.5" with synchronized movement alongside the buttpad for consistent alignment and body positioning.

2. Synchronized Ergonomics:

   • Unlike traditional stocks, the RAS keeps the cheek riser and buttpad perfectly aligned regardless of length and height adjustments.

   • Adapt seamlessly to changing scenarios like change in optics, optic failures, transitioning to iron sights, or accommodating gear like body armor or NVGs and Helmets.

3. Superior Grip and Control:

   • The buttpad is made from injection-molded rubber and is permanently attached to the stock body. This provides superior grip and control, ensuring stability and comfort during dynamic shooting scenarios.

4. Precision Engineering:

   • 7075 Aluminum Body: Type 3 hard coat anodized for maximum durability and a professional finish.

   • Stainless Steel Rods and Ball Bearings: Ensure strength, reliability, and secure locking into position.

5. Enhanced Usability:

   • Compatible with JMac’s SM mounts or folding mechanisms for added versatility.

   • Features 2 QD sling swivel points and a 1-inch sling slot for flexible carry options.

Specifications:

• Length Adjustment Range: 7.125" to 10.25" with 5 positions 

• Cheek Riser Adjustment: 1.375" vertical travel with 12 positions 

• Weight: TBD (Prototype 13.5oz)

• Materials: 7075 aluminum body, stainless steel rods, injection-molded rubber buttpad (prototype shown with aluminum buttpad)

• Finish: Type 3 hard coat anodized

• Compatibility: JMac SM Stock/Brace Mounts and folding mechs. Firearms with a 1913 rear interface

 

Note: Optional clip-on cheek pads and alternate color cheek risers may be offered in the future.