MadBull ACE Licensed SOPMOD Stock for M4/M16 Series Airsoft AEG

Premium ACE-Licensed Construction • External Battery Space • Aircraft-Grade Aluminum Strength

The MadBull ACE Licensed SOPMOD Stock is one of the most trusted and battle-proven stock designs ever adapted for airsoft use. Fully licensed from ACE and engineered by Socom Gear / MadBull Airsoft, this stock delivers unmatched durability, utility, and comfort tailored to modern M4 and M16 platform AEGs. If you’re looking to elevate your rifle with a stock that blends real-world pedigree, rock-solid build quality, and enhanced ergonomics, this ACE SOPMOD Stock stands at the top of the list.

Built From Aircraft-Grade Aluminum for Maximum Durability

MadBull manufactures this stock from high-strength, aircraft-grade aluminum, ensuring it can withstand demanding field environments while keeping weight manageable. Unlike plastic or polymer stocks, the ACE SOPMOD provides a reinforced, rigid structure that won’t flex, warp, or degrade over time. This construction gives your AEG a more realistic feel, superior durability, and a longevity boost that makes it a long-term upgrade rather than a temporary add-on.

Rear Wiring Slot for External Battery Storage

One of the standout features is the rear wiring slot specifically designed for external battery compartments. This offers a huge advantage for rear-wired builds, especially those with upgraded internals requiring more battery space. The unique design allows for clean routing, secure fitment, and better balance—an ideal setup for players who run buffer-tube LiPo packs or want extended battery life without bulky external modifications.

Enhanced Ergonomics and Shooting Stability

The stock includes a ½-inch rubber recoil pad, providing a comfortable and stable shoulder platform. Even though recoil in airsoft is minimal, this pad enhances grip and stability during rapid fire or aggressive movement. The closed-cell foam over-tube significantly improves comfort, especially during long gameplay sessions or when shouldering the rifle repeatedly. This is the kind of ergonomic attention that separates a premium stock from standard AEG furniture.

Fully Adjustable for Customized Fit

Whether you’re running a CQB-optimized setup or a full-length outdoor rifle, the multi-position adjustability of the ACE SOPMOD Stock allows you to fine-tune its length according to your gear, stance, or shooting style. The stock locks securely into place with no wobble, helping maintain consistent sight alignment and overall rifle stability.

Five QD Sling Mount Points for Maximum Flexibility

Every rifle setup is different, and so are sling preferences. That’s why this stock features five QD sling mount options. Whether you prefer a two-point sling, single-point, or quick transitions between the two, the MadBull ACE Licensed SOPMOD Stock adapts to your configuration with ease. (QD swivels are not included, so make sure you have a compatible set on hand.)

Designed in the USA — Authentic, Licensed, and Field-Ready

This stock is officially licensed from ACE, ensuring accurate design and authentic styling directly based on the real-steel system. Designed in the USA and manufactured with uncompromising attention to quality, it’s a trusted choice for players, techs, milsim enthusiasts, and collectors who want something more than basic polymer furniture.

Compatibility Notes

• Fits most M4/M16 AEGs

• Does not fit KWA without modification

• Minor fitting may be required depending on manufacturer tolerances

• Buttstock screws are NOT included (use the original screws from your AEG)

• For airsoft use only

Upgrade Your Rifle With Real-World Strength and Premium Comfort

The MadBull ACE Licensed SOPMOD Stock is the ideal upgrade for players who want a tough, realistic, and highly functional stock that enhances both handling and durability. Whether you’re building a high-end custom M4 or refreshing an existing setup, this stock delivers reliability and performance inspired by real tactical equipment—now available for your Airsoft AEG.