FailZero

FailZero's EXO Nickel Boron coated bolt carrier groups are some of the best available on the market today. Watch FailZero's VP of Sales explain why their coating works so well compared to other leading brands. Their Nickel Boron BCGs are one of our top picks for builders, so you can buy with confidence.

FailZero

FailZero 5.56/.223 Bolt Assembly, EXO Nickel Boron Coated

Retail: $85.00

Was:

Now: $82.95

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FailZero

FailZero AR-15 Bolt Carrier Group with Hammer, Completely Assembled, EXO Nickel Boron Coated

Retail: $185.00

Was:

Now: $169.95

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FailZero

FailZero AR-15 Bolt Carrier Group, EXO Nickel Boron Coated, Black Finish

Retail: $179.99

Was:

Now: $159.99

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FailZero

FailZero AR-15 Bolt Carrier Group, No Hammer, Completely Assembled, EXO Nickel Boron Coated

Retail: $169.99

Was:

Now: $139.99

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FailZero

FailZero AR-15 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Matte Finish

Retail: $179.99

Was:

Now: $139.99

Add to Cart
FailZero

FailZero Bolt Carrier Group (No Hammer), 7.62X39 Completely Assembled, EXO Nickel Boron Coated

Retail: $189.99

Was:

Now: $179.99

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FailZero

FailZero M16 / M4 Bolt Carrier Group, No Hammer, Completely Assembled, EXO Nickel Boron Coated

Retail: $159.99

Was:

Now: $129.95

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FailZero

FailZero M16/M4 Bolt Carrier Group with Hammer, EXO Nickel Boron Coated, Nickel Finish

Retail: $189.99

Was:

Now: $159.99

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FailZero

FailZero M16/M4 Bolt Carrier Group, No Hammer, Black Nitride Coated, Black Finish

Retail: $119.99

Was:

Now: $114.99

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FailZero

FailZero M16/M4 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Matte Finish

Retail: $179.99

Was:

Now: $139.99

Add to Cart
FailZero

FailZero, 450 Bushmaster AR-15 Bolt Carrier Group - No Hammer, EXO Nickel Boron Coated

Retail: $189.99

Was:

Now: $169.99

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FailZero

FailZero, 458 SOCOM AR-15 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated

Retail: $189.99

Was:

Now: $169.99

Add to Cart
FailZero

FailZero, AR10 (.308) Bolt Carrier Group, Black

Retail:

Was:

Now: $274.99

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FailZero

FailZero, AR10 (.308) Bolt Carrier Group, EXO Nickel Boron Coated

Retail: $259.99

Was:

Now: $239.99

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FailZero

FailZero, AR9, 9MM BCG, Black Nitride

Retail: $179.99

Was:

Now: $169.99

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FailZero

FailZero, AR9, 9MM Bolt Carrier Group, EXO Nickel Boron

Retail: $199.99

Was:

Now: $189.99

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FailZero

FailZero, Bolt Carrier Group, 6.8SPC, Nickel Boron Coated, No Hammer

Retail: $189.99

Was:

Now: $159.99

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FailZero

FailZero, EXO Nickel Boron Coated Firing Pin

Retail:

Was:

Now: $12.50

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FailZero

FailZero, Lightweight Bolt Carrier Group, EXO Nickel Boron Coated, Nickel Finish

Retail: $234.99

Was:

Now: $214.99

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FailZero

FailZero, M16/M4 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Black Finish

Retail: $179.99

Was:

Now: $139.99

Add to Cart

FailZero

FailZero 5.56/.223 Bolt Assembly, EXO Nickel Boron Coated

This fully assembled and NiB coated (5.56/.223) bolt assembly is compatible with most mil spec AR15, M16, M4 Carriers. EXO Nickel Boron provides permanent dry lubricity; increased wear and corrosion...

Retail: $85.00

Was:

Now: $82.95

Add to Cart
FailZero

FailZero AR-15 Bolt Carrier Group with Hammer, Completely Assembled, EXO Nickel Boron Coated

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides...

Retail: $185.00

Was:

Now: $169.95

Add to Cart
FailZero

FailZero AR-15 Bolt Carrier Group, EXO Nickel Boron Coated, Black Finish

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...

Retail: $179.99

Was:

Now: $159.99

Add to Cart
FailZero

FailZero AR-15 Bolt Carrier Group, No Hammer, Completely Assembled, EXO Nickel Boron Coated

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides...

Retail: $169.99

Was:

Now: $139.99

Add to Cart
FailZero

FailZero AR-15 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Matte Finish

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides...

Retail: $179.99

Was:

Now: $139.99

Add to Cart
FailZero

FailZero Bolt Carrier Group (No Hammer), 7.62X39 Completely Assembled, EXO Nickel Boron Coated

This 7.62×39 Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil-spec upper receivers chambered in 7.62×39. All critical parts are coated with EXO Nickel Boron...

Retail: $189.99

Was:

Now: $179.99

Add to Cart
FailZero

FailZero M16 / M4 Bolt Carrier Group, No Hammer, Completely Assembled, EXO Nickel Boron Coated

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...

Retail: $159.99

Was:

Now: $129.95

Add to Cart
FailZero

FailZero M16/M4 Bolt Carrier Group with Hammer, EXO Nickel Boron Coated, Nickel Finish

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...

Retail: $189.99

Was:

Now: $159.99

Add to Cart
FailZero

FailZero M16/M4 Bolt Carrier Group, No Hammer, Black Nitride Coated, Black Finish

This BCG is designed for shooters looking for a tactical advantage resulting from the non-reflective properties of Black Nitride.The carrier comes with a Black Nitride finish for great corrosion...

Retail: $119.99

Was:

Now: $114.99

Add to Cart
FailZero

FailZero M16/M4 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Matte Finish

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...

Retail: $179.99

Was:

Now: $139.99

Add to Cart
FailZero

FailZero, 450 Bushmaster AR-15 Bolt Carrier Group - No Hammer, EXO Nickel Boron Coated

Not all Nickel Boron is created equal and FailZero is the undisputed pioneer of Nickel Boron technology. When failure is not an option, you can depend on FailZero. The .450 Bushmaster Bolt Carrier...

Retail: $189.99

Was:

Now: $169.99

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FailZero

FailZero, 458 SOCOM AR-15 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated

This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec .450 BUSHMASTER/.458 SOCOM Upper Receivers. All critical parts are coated with EXO Nickel Boron technology...

Retail: $189.99

Was:

Now: $169.99

Add to Cart
FailZero

FailZero, AR10 (.308) Bolt Carrier Group, Black

This FailZero Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most AR10 (LR-308) upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides...

Retail:

Was:

Now: $274.99

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FailZero

FailZero, AR10 (.308) Bolt Carrier Group, EXO Nickel Boron Coated

This FailZero Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most AR10 (LR-308) upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides...

Retail: $259.99

Was:

Now: $239.99

Add to Cart
FailZero

FailZero, AR9, 9MM BCG, Black Nitride

This 9mm Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The FailZero Black Nitride 9mm BCG is compatible with both lowers designated...

Retail: $179.99

Was:

Now: $169.99

Add to Cart
FailZero

FailZero, AR9, 9MM Bolt Carrier Group, EXO Nickel Boron

This 9mm AR Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most 9mm AR platform rifles and pistols. The FailZero 9mm BCG is compatible with both lowers designated for Glock or...

Retail: $199.99

Was:

Now: $189.99

Add to Cart
FailZero

FailZero, Bolt Carrier Group, 6.8SPC, Nickel Boron Coated, No Hammer

This 6.8 SPC Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most Mil-Spec upper receivers chambered in 6.8 SPC. All critical parts are coated with EXO Nickel Boron technology...

Retail: $189.99

Was:

Now: $159.99

Add to Cart
FailZero

FailZero, EXO Nickel Boron Coated Firing Pin

This EXO Nickel Boron coated firing pin provides a permanently lubricious surface for extreme durability and increased wear and corrosion resistance.

Retail:

Was:

Now: $12.50

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FailZero

FailZero, Lightweight Bolt Carrier Group, EXO Nickel Boron Coated, Nickel Finish

Explore peak performance with the FailZero Lightweight BCG – an exceptional addition that performs as brilliantly as it looks! Crafted by FailZero, renowned for ease of maintenance and backed...

Retail: $234.99

Was:

Now: $214.99

Add to Cart
FailZero

FailZero, M16/M4 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Black Finish

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...

Retail: $179.99

Was:

Now: $139.99

Add to Cart