B5 Systems SOPMOD Stock Mil-Spec AR-15 FDE
B5 Systems
$95.00
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B5 Systems
B5 Systems SOPMOD Stock Mil-Spec AR-15 FDE
The B5 Systems SOPMOD Stock in Flat Dark Earth (FDE) brings military-proven design directly to your AR-15 build, combining the battle-tested Crane NSWC SOPMOD profile with modern ergonomic upgrades and mil-spec materials for a stock that performs as hard as you do.
- Overmolded steel anti-rotational QD sling mounts for secure, play-free attachment
- Dual water-resistant storage compartments keep batteries and essentials accessible
- No-slip cushioned buttpad reduces felt recoil and improves shoulder contact
- Color-matched steel hardware delivers a clean, cohesive FDE aesthetic
- Suregrip stock latch ensures positive, rattle-free lockup on your buffer tube
- Fits mil-spec carbine receiver extensions — compatible with most AR-15 platforms
Who This Is For
The B5 Systems SOPMOD Stock is purpose-built for AR-15 owners who demand more than a basic collapsible stock — whether you're a competitive shooter, a serious home defender, or a tactical enthusiast who values the same ergonomics trusted by military professionals. Its FDE finish makes it an ideal match for desert- or coyote-themed builds, and its mil-spec fit means it drops onto virtually any standard carbine buffer tube without modification.
Specifications
| Brand | B5 Systems |
|---|---|
| Model | SOPMOD Stock (Enhanced) |
| Color / Finish | Flat Dark Earth (FDE) |
| Buffer Tube Compatibility | Mil-Spec Carbine Receiver Extension |
| Sling Mount Type | Overmolded Steel Anti-Rotational QD & Fixed |
| Storage | Dual Water-Resistant Compartments |
| Hardware | Color-Matched Steel |
| Buttpad | No-Slip Cushioned Overmold |
| Material | Mil-Spec Polymer & Steel |
| Country of Origin | USA |
| Platform | AR-15 / M4-Pattern Rifles |
Frequently Asked Questions
Will this stock fit my AR-15's existing buffer tube?
Yes — the B5 Systems SOPMOD Stock is designed to fit mil-spec carbine receiver extensions, which are the most common buffer tube standard found on AR-15 and M4-pattern rifles. If you're unsure whether your buffer tube is mil-spec or commercial-spec, check with your lower receiver manufacturer. Commercial-spec tubes have a slightly different diameter and taper, and are not compatible with this stock.
What can I store in the compartments, and are they truly waterproof?
The dual storage compartments are designed to hold small essentials like CR123 batteries, a small light, or a folded cleaning patch. B5 Systems rates them as water-resistant rather than fully waterproof, so they'll handle rain and moisture exposure well but shouldn't be submerged. The compartments open easily with one hand, making them practical for field use.
How does the B5 SOPMOD compare to a standard M4 collapsible stock?
The SOPMOD offers several meaningful upgrades over a basic M4-style stock. The cheek weld is more ergonomic and consistent, the QD sling mounts are anti-rotational so your sling won't torque or bind, the buttpad provides better recoil absorption, and the built-in storage adds real utility. For shooters who spend time at the range or in the field, these refinements translate into a noticeably better shooting experience without adding significant weight or complexity.
