The LWRC Ultra Compact Stock Assembly is a complete collapsible stock system designed to cut overall rifle length by a full inch compared to a standard AR-15 setup. If you're building a short-barreled rifle, working in tight spaces, or just prefer a more maneuverable platform, this factory-matched kit gives you a professional solution straight out of the box. Everything you need—stock, receiver extension, index plate, buffer, recoil spring, and castle nut—is engineered to work together, eliminating compatibility guesswork and ensuring reliable performance.
Built on LWRC's proven UCIW (Ultra-Compact Individual Weapon) concept, this stock delivers the ergonomics and durability expected from a serious AR manufacturer. The collapsible design features four adjustment positions for length of pull, so you can dial in the fit whether you're running it over body armor, a heavy jacket, or just prefer a shorter cheek-to-trigger distance. One-hand adjustability keeps you in the fight without breaking your grip or sight picture.
The stock itself is lightweight and includes integral sling attachment points—no rail real estate sacrificed, no add-on hardware needed. The rubber buttpad locks in place during recoil and prevents the rifle from shifting against your shoulder during rapid fire. Combined with the engineered receiver extension and matched recoil system, you get a compact AR that handles like it was built for the job, not cobbled together from spare parts.
Key Features
- Complete stock assembly kit—stock, receiver extension, index plate, buffer, recoil spring, and castle nut included and pre-matched for reliable function
- Reduces overall rifle length by 1 inch versus standard AR-15 configurations
- Four-position adjustable receiver extension for customizable length of pull
- Integral sling attachment points built into the stock
- One-hand collapsible adjustment for quick length changes
- Rubber buttpad resists slippage under recoil
- Lightweight design derived from LWRC's UCIW platform
- Black finish
Specifications
| Brand | LWRC International |
| Product Type | AR-15 Collapsible Stock Assembly |
| System Design | Ultra Compact Individual Weapon (UCIW) |
| Length Reduction | 1 inch shorter than standard AR-15 stock |
| Adjustment Positions | 4 positions (receiver extension) |
| Included Components | Stock, receiver extension, index plate, buffer, recoil spring, castle nut |
| Sling Attachment | Integral points |
| Buttpad | Rubber |
| Finish | Black |
Frequently Asked Questions
Does this stock assembly come with everything I need to install it?
Yes. The kit includes the stock, receiver extension, index plate, buffer, recoil spring, and castle nut. All components are designed to work together as a system, so you have everything needed for installation without sourcing parts separately.
How much shorter does this make my AR-15?
The LWRC Ultra Compact Stock Assembly reduces overall rifle length by 1 inch compared to a standard AR-15 stock setup.
Can I adjust the length of pull?
Yes. The receiver extension features four adjustable positions, allowing you to customize the length of pull to fit your needs—whether you're running it with body armor, heavy clothing, or simply prefer a shorter configuration.
Does the stock have sling attachment points?
Yes. The stock features integral sling attachment points built directly into the design, so you can mount a sling without adding external hardware or using up rail space.
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