Strike Industries Modular Fixed Stock for AR-15/LR-308 Carbine - Mil-Spec Diameter Polymer

The Strike Industries Modular Fixed Stock for AR-15/LR-308 carbines brings a rare combination to the platform: the solid cheek weld and rock-solid feel of a fixed stock paired with the length-of-pull adjustability you'd expect from a collapsible design. Built for mil-spec diameter receiver extensions, this polymer stock ditches the rattle and flex of loose-fitting alternatives while giving you the fine-tuning capability to dial in your perfect grip-to-shoulder distance using the included shim set.

If you're running a carbine-length AR and want a no-compromise cheek rest that won't shift under recoil, this strikes the balance between fixed integrity and shooter-specific adjustment. The modular design means you're not locked into one length of pull—swap shims to accommodate different shooting positions, gear, or just get that stock fitting you like it. It's the kind of refinement that separates a rifle you tolerate from one you actually run well.

Strike Industries engineered this for shooters tired of choosing between adjustability and durability. The polymer construction keeps weight reasonable, and the mil-spec fitment means zero guesswork on compatibility with your existing carbine buffer tube setup.

Key Features

• Fixed stock architecture with adjustable length of pull via included shims
• Mil-spec diameter polymer construction for standard AR-15/LR-308 carbine receiver extensions
• Solid cheek weld and zero-rattle fit
• Modular design allows LOP customization without full stock replacement

Specifications

Frequently Asked Questions

Will this fit my AR-15 or LR-308 with a standard carbine buffer tube?

Yes. The Strike Industries Modular Fixed Stock is designed for mil-spec diameter receiver extensions, which is the standard carbine-length setup on most AR-15s and LR-308s. If you're unsure, verify that your receiver extension is mil-spec before ordering.

How do I adjust the length of pull?

The included shim set lets you adjust length of pull to fit your shooting style, gear configuration, or body geometry. Simply swap shims to change the fit without replacing the entire stock.

What's the difference between this and a standard fixed stock?

A standard fixed stock locks you into one length of pull. The Strike Industries Modular Fixed Stock gives you the solid, rattle-free feel of a fixed design but adds the flexibility to dial in your ideal LOP with shims, combining the best of both approaches.

What comes in the box?

The stock ships with a shim set for length-of-pull adjustment. All other hardware needed for installation on a standard mil-spec receiver extension is included.