Genuine ACR Folding Stock

The Magpul ACR Stock is one of the most iconic and highly sought-after folding stocks ever made. Discontinued years ago and long gone from Magpul’s catalog, it has become a true unicorn on the used market—commanding serious prices and vanishing the moment one appears.

Haga Defense has secured a large stash of brand-new, never-mounted black folding Magpul ACR stocks. These are the real deal: high-impact composite polymer construction, rubber butt pad, 7-position telescoping length of pull, right-side folding hinge with detent, and a locking adjustable cheek weld that raises ½" for better optics alignment. Multiple sling attachment points (side-swappable QD coupler and single-point loop) are built in.

This is a limited release. When this inventory is gone, these brand-new Magpul ACR stocks are gone forever. No restocks. No more coming.

We are offering them two ways:

• As-is (stock only) — perfect if you already have a compatible adapter or want to use it on a factory ACR / compatible platform.
• With a Haga Defense adapter pre-installed — so you can put this legendary stock on a variety of modern platforms. Specific platforms are being finalized and will be listed as options become available. 1913 adapter is a for sure. 

These are not used, not take-offs, and not clones. New Old Stock (NOS) Magpul ACR stocks from our reserved inventory.

Specifications

• Manufacturer: Magpul Industries
• Model: ACR Folding Stock Assembly
• Color: Black
• Condition: New Old Stock (NOS) dated 2020-2021
• Material: High-impact composite polymer with rubber butt pad
• Adjustment: 7-position telescoping
• Folding: Right-side fold with hinge detent (can be fired folded on compatible platforms)
• Cheek Weld: Adjustable, locking, raises ½"
• Sling Points: QD coupler (swappable sides), single-point loop
• Availability: Limited release — when gone, gone forever
• Options: Stock only, or stock + Haga Defense adapter (platforms TBD)

Compatibility and Installation Notes

• Native fit on Bushmaster/Magpul ACR platforms (and compatible clones that use the same hinge interface)
• Available with Haga Defense adapters pre-installed for additional platforms (specific platforms to be announced; check product options or contact us)
• Stock-only version will only fit ACR rifles and clones
• Adapter versions include the appropriate Haga Defense adapter already installed for the selected platform
• No permanent modifications required when using the correct Haga Defense adapter
• Confirm exact platform compatibility before ordering the adapter version
• These are stocks and will NOT be offered in pistol brace form or with brace adapters as an option. 

Adjustment Notice: Near the end of Magpul ACR stock production, the molds had worn. This caused some of the plastic parts to come out slightly larger than earlier runs. As a result, many of these stocks fit together tighter than intended and can be difficult to extend the length of pull at first. This is normal for these later-production stocks. The fit typically loosens up with use as the parts break in. You can also make adjustment easier right away by applying a small amount of grease (such as white lithium grease or a light silicone grease) to the tight mating surfaces. No other function is affected — the stock still locks solidly once set and folds normally.

Installation Instructions

1. Safety First: Before beginning installation, make sure the firearm is completely unloaded, the chamber is empty, and the safety is engaged. Remove the magazine, visually and physically inspect the chamber to confirm it is empty, and point the firearm in a safe direction at all times.
2. No further installation instructions available at this time.