MAC 5k Folding Stock

Polymer Folding Stock for MAC-5K & Compact HK Platforms

Transform your MP5K-pattern firearm with a rugged, lightweight folding stock engineered for secure lockup, compact storage, and enhanced shooting control. Constructed from high-strength glass-filled nylon, this stock is built to withstand years of hard use while maintaining a lightweight profile. The robust push-button latch locks the stock firmly in the extended position, delivering a stable shooting platform with minimal movement. When folded, the cam-actuated hinge securely retains the stock against the receiver, preventing unwanted movement and keeping the firearm compact for transport and storage. The stock features a comfortable 10.5" length of pull — included spacer plates and extended mounting hardware allow shooters to customize fitment with up to an additional inch to accommodate body armor, shooting gear, or personal preference. An integrated rotating sling swivel provides flexibility for modern sling setups.

Notable Features

• Durable glass-filled nylon construction — lightweight and built for hard use
• Positive-locking push-button latch system for a solid, rattle-free extended position
• Cam-retained folding mechanism keeps stock secure and compact when folded
• Adjustable length of pull from 10.5" to 11.5"
• Integrated rotating sling swivel for modern sling configurations

What's Included

• Folding stock
• Two 1/2" spacer plates
• Extended mounting hardware

Compatible With

• MAC 5K
• MP5K
• SP5K
• SP89

Important Legal Information

NFA Compliance Notice: Installation of this product on certain firearm configurations may result in a firearm regulated under the National Firearms Act (NFA). It is the owner's responsibility to comply with all applicable federal, state, and local laws before assembling or modifying any firearm.