Cross Armory CRSL Stock Lock Converter - Convert Adjustable to Fixed Stock, 7075-T6 Aluminum, Black Finish for AR-15, M4

If you're running an adjustable stock on your AR-15 or M4 but prefer—or need—a fixed configuration, the Cross Armory CRSL Stock Lock Converter gives you a straightforward way to lock down your setup. This aluminum converter transforms an adjustable stock into a fixed one, letting you maintain your rifle's ergonomics without the added length or wiggle of a collapsible tube. Whether you're building a fixed-stock platform rifle, complying with local regulations, or just prefer the simplicity and reliability of a non-adjustable system, this tool handles the conversion cleanly.

Built from 7075-T6 aluminum—a high-strength alloy trusted in aerospace and precision manufacturing—the CRSL converter is engineered to be durable and lightweight. The black finish resists corrosion and blends seamlessly with modern tactical rifle aesthetics. The converter is purpose-built for AR-15 and M4 platforms, ensuring proper fit and function on these common modern sporting rifles.

This is the kind of no-nonsense upgrade that appeals to shooters who value simplicity: no springs to manage, no adjustments to creep loose at the range, and no moving parts to wear out. It's a practical choice for hunters, competitors, and builders who've already settled on their ideal length of pull and want to lock it in place for good.

Key Features

• Converts adjustable stock to fixed configuration on AR-15 and M4 platforms
• Constructed from 7075-T6 aluminum for lightweight strength and durability
• Black anodized finish for corrosion resistance and tactical appearance
• Eliminates stock rattle and movement once locked in position

Specifications

Frequently Asked Questions

Will this work with my AR-15 adjustable stock?

The Cross Armory CRSL Stock Lock Converter is designed for AR-15 and M4 platforms with adjustable stocks. Verify your specific stock model against Cross Armory's compatibility information before ordering.

Does this require any gunsmithing or special tools to install?

We don't have installation instructions in our product information. Contact Cross Armory directly or consult the product documentation for installation guidance.

Can I adjust the stock length after installing this converter?

The CRSL Stock Lock Converter locks your adjustable stock into a fixed position, so once installed, the stock length cannot be adjusted. Choose your desired length of pull before locking it in place.