Description
There's something about the slim CAR15 silhouette that never gets old. B5 Systems brought this one back for the crowd chasing that early carbine look, and they nailed the details. The stock reproduces the original polymer lines and sharp checkering you remember from vintage guns, but it's built from modern mil-spec materials so it holds up to hard use without the extra bulk. At roughly 4.2 ounces, it keeps the front-to-back balance of a lightweight build feeling right.
What the B5 CAR15 Stock Brings to a Retro Build
If you're piecing together an XM177-style clone or just want to ditch a bulky modern stock for something cleaner, this is the piece that ties the look together. The OD Green finish plays nicely with green grips, handguards, and other furniture, so you can build a cohesive rifle instead of a mismatched parts gun. It carries the aggressively knurled anti-slip buttplate that bites into your shoulder and keeps the gun planted, plus multiple fixed sling loops so you can run a two-point or traditional carry setup however you like.
Fitment and Everyday Use of the CAR15 Buttstock
This stock is cut for standard mil-spec size receiver extensions, which is the same diameter used by the vast majority of AR-15 buffer tubes on the market. Before ordering, it's worth confirming your rifle runs a mil-spec tube rather than a commercial one, since the two diameters differ slightly. Slide it on, tighten things up, and you're set. There's also a handy egress channel molded in that lets fluids and gunk drain out when you're cleaning, which is a small touch that makes maintenance less of a chore.
Why B5 Systems Earns the Trust
B5 has a reputation for furniture that survives real range time and duty use, and this retro piece is made in the USA to the same standards. It's a straightforward way to get authentic period looks without hunting down worn-out surplus parts. Whether you're restoring an old-school carbine or building a light range gun from scratch, the CAR15 stock delivers the classic feel with parts you can count on.
Key Specifications
- Manufacturer: B5 Systems
- Model: CAR15
- Manufacturer Part Number: CAR-1482
- UPC: 814927023109
- Color: Olive Drab Green
- Product Type: Buttstock
- Material: Modern Mil-Spec Polymer
- Fitment: Standard Mil-Spec Receiver Extensions
- Weight: 4.2 oz
- Height: 4.35 in
- Length: 6.2 in
- Width: 1.73 in
- Sling Attachment: Multiple Fixed Sling Points
- Buttplate: Aggressively Knurled Anti-Slip
- Country of Origin: USA
What’s Included
- B5 Systems CAR15 buttstock in Olive Drab Green
Frequently Asked Questions
Will the B5 CAR15 stock fit my AR-15 buffer tube?
It's designed for standard mil-spec size receiver extensions, which is the most common buffer tube diameter used on AR-15 builds. Commercial-spec tubes are slightly larger, so if your rifle runs a commercial tube it won't slide on correctly. When in doubt, check whether your buffer tube is marked mil-spec or measure it before ordering.
Does the CAR15 stock come with a buffer tube or hardware?
No, this is the stock body only. You'll need a mil-spec carbine receiver extension, buffer, and spring already installed on your lower to run it. If you're starting a fresh build, plan on picking up a complete buffer tube kit separately.
Is this a fixed stock or does it collapse?
The CAR15 slides onto a mil-spec receiver extension and works with the tube's existing position notches, so adjustment depends on how many positions your buffer tube offers. It keeps that classic retro carbine profile rather than the bulkier look of modern collapsible stocks. The result is a lightweight, slim setup that looks right on a period-correct build.
What kind of build is the OD Green CAR15 stock best for?
It shines on retro and clone-inspired rifles like XM177-style carbines, plus minimalist and lightweight range builds where you want to trim bulk. The Olive Drab Green finish pairs well with matching green grips and handguards for a cohesive look. It's also a clean upgrade if you just want an old-school profile with modern durability.







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