Fail Zero Lightweight M16 Bolt Carrier Group - No Hammer

Manufactured by Fail Zero
3 Reviews


In Stock

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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 low mass of the Lightweight Bolt Carrier Group offers smoother operation and less recoil, keeping you on target for faster follow-up shots. Coated with EXO nickel boron, all critical parts enjoy permanent dry lubricity and increased wear and corrosion resistance. This results in reduced friction, improved performance, and a BCG that is easier to clean. This bolt carrier group is drop-in ready for most MIL-SPEC AR-15/M16 upper receivers.

  • Compatible with .223/5.56 and 300 Blackout
  • 21% weight reduction from standard MIL-SPEC
  • FZ logo engraved into the carrier
  • High polish finish
  • Smoother operation
  • Compatible in all MIL-SPEC AR platforms
  • All components are EXO nickel boron coated with a high polish finish
  • Weight: 9.2 oz


Bolt FinishNickel Boron - Polished
Bolt MaterialCarpenter 158 Steel
BrandFail Zero
Caliber Gauge5.56 NATO
Carrier FinishNickel Boron - Polished
Carrier Material8620 Carpenter Steel
Carrier StyleLow Mass Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected
Weight9.2 Oz

Ratings & Reviews

3 reviews

  • 4 stars
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  • 2 stars
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  • 1 star
  • 0 reviews

Good bcg with excellent coating.


This is an excellent light bcg. Fail zero has excellent coatings which have never come off on mine. I’ve bought other cheaper brands that would have coating flake off after one firing. No worries with Fail zero. Just pricy. And the one review about it not being an auto rated bcg? Really? It’s a Light bolt carrier group! Anyone that knows what they are doing can tell it won’t actuate a full auto system. Don’t give poor reviews if you don’t understand the product.

Great upgrade especially if your using junk steel casings. Bolt is magnetic so it pulls out shavings from casings and from normal wear.


This definitely trips my registered NFA full auto sear. Never once had a problem. However be a little prepared as the cyclic cycle will increase. I didn’t get a chance to time it yet so I cannot give the exact timing. Will keep updating on this product.

AR15 not M16


Not an M16 bolt carrier. It's an AR15 bolt carrier group. Rear is not long enough to trip an auto sear on M16.