Click to see full view
FailZero
Overview
The FailZero Exo Nickel Boron 9mm AR9 Bolt Carrier Group is designed specifically for pistol caliber blowback systems, making it an ideal choice for those building a 9mm AR-15. Its Nickel Boron finish not only enhances durability but also provides smoother cycling and easier cleaning, which are crucial for reliable performance in high-volume shooting scenarios. This bolt carrier group is commonly found in builds utilizing a pistol gas system, ensuring seamless operation and efficiency.
Specifications
FailZero Exo Nickel Boron 9mm AR9 AR-15 Bolt Carrier Group
Available Merchants(5)
Prices checked
Price Alert
Build history on GunPartPicker
Builders on GunPartPicker first added the FailZero Exo Nickel Boron 9mm AR9 AR-15 Bolt Carrier Group to a build in February 2026.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 3 of the 5 retailers we track have it in stock. The best price crept up from $180.84 to $192.99 over September 2026. Buying today, the lowest price is $189.42 at KY Gun Company, above September's low of $175.49, so a better deal may come back.
Trending bolt carrier groups →
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
Not sure which bolt carrier group to pick?
We ranked every bolt carrier group by how often it shows up in real builds on GunPartPicker.
Read the guide: The Most Trusted AR-15 BCGs →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Foxtrot Mike Products Complete FM9 Premium 9mm AR-15 Lower Receiver
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Foxtrot Mike Products MIKE-9 VFM-9 Dual Charging Handle 9mm AR-15 Complete Upper Receiver - 5.2"
Rise Armament Advanced Performance Trigger, Red - RA-535-RED-ARP
Fortis SHIFT Vertical Grip - M-LOK
Maxim Defense CQB Gen 7 Standard Buffer Adjustable AR-15 Stock, Black - MXM-47617
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.
No reviews yet. Be the first to review this product!