B5 Systems Enhanced SOPMOD Stock Mil-Spec for AR-15
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
Fits AR-15/M4 rifles with a Mil-Spec-diameter carbine receiver extension (buffer tube). Check your tube specification before ordering.
Not sure it fits your rifle? Ask us before you order
The B5 Systems Enhanced SOPMOD is a collapsible carbine stock for AR-15 and M4 rifles, fitting any Mil-Spec-diameter carbine receiver extension.
A stock built for hard service — the Enhanced SOPMOD gives a carbine a rear end that soaks up abuse.
The B5 Systems Enhanced SOPMOD Stock is the commercial version of the SOPMOD-pattern furniture B5 Systems is known for. The wide SOPMOD cheek weld — a pattern shooters consistently rate among the most comfortable ever fitted to a carbine — pairs with water-resistant storage compartments on both sides and ambidextrous QD sling sockets, all moulded in glass-filled polymer.
On a Mil-Spec carbine extension it locks up tight and adjusts positively, giving duty and hard-training rifles a rear end that takes punishment and keeps batteries dry while doing it. This is what "buy once" looks like in a carbine stock.
Fits AR-15/M4 rifles running a Mil-Spec-diameter carbine receiver extension (buffer tube) — slide it on, set your length, load the compartments. Commercial-diameter tubes are oversized and will not take this stock, so check your tube specification before ordering. The QD sockets accept standard push-button quick-detach sling swivels, and the compartments seal against splash and weather rather than being fully submersible.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec carbine receiver extension |
| Type | Collapsible carbine stock with storage |
| Material | Glass-filled polymer |
| Finish | Black, Flat Dark Earth, Coyote Brown, Olive Drab Green, Wolf Grey |
| Mount interface | Ambidextrous QD sling sockets |
| Brand | B5 Systems |
| MPN | SOP-1074 · SOP-1075 · SOP-1076 · SOP-1097 · SOP-1123 |
Built for hard service. Order the Enhanced SOPMOD today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Rifle & Shotgun Stocks, Precision Rifle Stocks, AR-15 Parts or browse all B5 Systems.
| Platform | AR-15 / M4 |
|---|---|
| Fits | Mil-Spec carbine receiver extension |
| Type | Collapsible carbine stock with storage |
| Material | Glass-filled polymer |
| Finish | Black, Flat Dark Earth, Coyote Brown, Olive Drab Green, Wolf Grey |
| Mount interface | Ambidextrous QD sling sockets |
| Brand | B5 Systems |
| MPN | SOP-1074 · SOP-1075 · SOP-1076 · SOP-1097 · SOP-1123 |
| Category | Rifle Stock |
| Barcode | 814927020009 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
It fits AR-15/M4 rifles running a Mil-Spec-diameter carbine receiver extension. Commercial tubes are oversized and will not take this stock, so check your tube specification before ordering. Measuring the tube is the quickest way to be sure if the rifle came to you second-hand.
It has water-resistant storage compartments in the body for batteries, small spares or a cleaning kit, and QD sockets built in for sling attachment. The body is glass-filled polymer, which is what gives it the solid, dense feel compared with lighter mouldings. It is the fuller-featured stock in the B5 line rather than the minimalist option.
The QD sockets take standard push-button quick-detach sling swivels, so you can move the sling from side to side depending on how you shoot. The compartments seal against splash and weather rather than being fully submersible, so treat them as somewhere to keep spares dry rather than a waterproof case. Both features add a little bulk over a slimline stock, which is the trade-off.
Black, Flat Dark Earth, Coyote Brown, Olive Drab Green and Wolf Grey are offered. If you would rather have a slim, snag-free stock without compartments, the <a href="/products/b5-systems-bravo-stock-mil-spec">B5 Bravo stock</a> is the lighter alternative on the same tube. Both sit alongside the rest of the range in <a href="/collections/b5-systems-stocks">B5 Systems stocks</a>.
This stock is dispatched from the United Kingdom with £5 tracked UK delivery in 7–10 business days, and you'll get tracking by email when it ships. If a part turns out to be the wrong fit, see our returns policy or <a href="/pages/contact">contact us</a> and we'll help sort it.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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