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B5 Systems
Overview
The B5 Systems Car-15 Buttstock is a Mil-Spec polymer stock designed for carbine buffer tubes, offering a lightweight and durable solution for your AR-15 build. Its simple design provides a comfortable cheek weld and stability, making it ideal for quick target acquisition. This buttstock is often found in builds featuring a mid-length gas system chambered in 5.56 NATO, reflecting its adaptability for various shooting applications.
Specifications
Available Merchants(8)
Prices checked
Price Alert
October 2026 on GunPartPicker
B5 Systems Car-15 Buttstock Mil-Spec Black ranked #66 of the 245 stocks and braces builders added on GunPartPicker in October 2026. Builders have added it to their builds on GunPartPicker. Since April 2026, it ranks #205 of the 560 stocks and braces builders have added.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today all 8 retailers we track have it in stock. Buying today, the lowest price is $43.99 at Brownells, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Read the guide: AR-15 Stock Popularity Report →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
B5 Systems Type 22 P-Grip - Black
Precision Reflex Gas Buster Charging Handle With Combat Latch
PSA AR-15 Built Stealth Upper Receiver - No T Marks - 516444539
Wilson Combat M16 Bolt Carrier Assy 5.56 NATO Polished Black Nitride
Expo Arms AR-15 Ambidextrous Safety Selector
Anderson Manufacturing AR-15 Stripped Lower Receiver - Closed Ear
Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
PlatformBased on real build data showing which platform (AR-15, AR-10, AR-9) builders pair with this product.
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
Builds Featuring This Part
See all builds →Builds in the community that include the B5 Systems Car-15 Buttstock Mil-Spec Black
| Build | Parts | Total |
|---|---|---|
 | 22 | $1475.41 |
 | 20 | $981.89 |
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