B5 Systems Car-15 Buttstock Mil-Spec Black
Click to see full view
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
Build history on GunPartPicker
Builders have been adding the B5 Systems Car-15 Buttstock Mil-Spec Black to their builds on GunPartPicker since February 2026. All time, it ranks #281 of the 446 stocks and braces builders have added.
Availability is good: it was in stock at one retailer or another nearly every day in August 2026, and today 7 of the 9 retailers we track have it in stock. It dipped to $41.80 at Optics Planet for a stretch in August 2026, under its usual $43.99 to $47.50, so sales do come around. Buying today, the lowest price is $43.99 at Brownells, above August's low of $41.80, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 35 retailers
Not sure which stock & brace to pick?
We ranked every stock & brace by how often it shows up in real builds on GunPartPicker.
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 5 builds that include this one
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B
B5 Systems Type 22 P-Grip - Black
Forward Controls Design AR-15 Enhanced Extended Mag Release Serrated Ambidextrous
Precision Reflex Gas Buster Charging Handle With Combat Latch
Forward Controls Design ABC/R V3 RB 5.56 Bolt Catch /Release Serrated, Rearward Biased Paddle - ABC/R V3 RB Serrated
PSA AR-15 Bolt Carrier Group 5.56 Full-Auto Nitride MPI - 516446953
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 2 →Builds in the community that include the B5 Systems Car-15 Buttstock Mil-Spec Black
| Build | Parts | Total |
|---|---|---|
 | 22 | $1464.78 |
 | 20 | $962.37 |
No reviews yet. Be the first to review this product!