Home / Bolt Carrier Groups / Failzero / FailZero Bolt Carrier Group with Semi Automatic Hammer nickel fits M16/4
▼ 9% below avg
FailZero Bolt Carrier Group with Semi Automatic Hammer nickel fits M16/4
Lowest Price
$139.99
MSRP
$189.99
Savings
26% off
Verified In Stock at
11 Stores
Updated
Aug 26, 2026
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Corrosion resistant
Dry lubricity
Extreme durability
Nickel Boron treated
Specifications
Description
Description This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16 M4 or AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity extreme durability and increases both wear and corrosion resistance. Nickel Boron treated parts include: Bolt & Extractor (5.56/.223 compatible) Bolt Carrier Semi-Auto Hammer (single stage) Extractor Cam Pin Carrier Key Firing Pin
