- Electroless nickel (EN) plated bolt carrier, heat treated & hardened
- Hardened gas key
- Grade 8 hardened fasteners
- Type III sealing compound
- Black phosphate outer finish and inner chrome lined bolt
- HPT/MPI bolt and extractor with Mil-Spec gas rings
- Caliber: 5.56 NATO / .223 Rem / 300 Blackout
- Carrier: Mil-Spec 8620 tool steel
- Bolt: 158 Carpenter Steel
- Carrier: Electroless Nickel
- Bolt: Black Phosphate
- Weight: 11.35 oz.
- Profile: M16 (Full-Mass)
**A full-auto (A.K.A. M16) bolt carrier installed in a standard semi-auto AR-15 will not make the gun fire full-auto.
- 1x Bolt Assembly
- 1x Extractor
- 1x Cam Pin
- 1x Electroless Nickel Plated Bolt Carrier
- 1x Carrier Key
- 1x Firing Pin
- 1x Firing Pin Retaining Pin
No matter what type of AR15 you are building, it will require a top-notch bolt carrier group (BCG) like this one from Phase 5 Tactical.
All components of this bolt carrier group are milled and polished in accordance with Phase 5 Tactical's stringent standards of quality. The parts then go through several hardening processes to make sure they are up to the job. The gas key and bolt are coated with black phosphate to provide further protection. But Phase 5 Tactical doesn't stop there; they give the carrier an electroless nickel coating. This type of coating significantly outperforms other nickel plating methods. The layer of nickel is much more uniform. It also forms an indestructible bond with the substrate metal.
Electroless nickel plating gives the carrier a natural degree of lubricity, allowing your weapon to function even when it is short on lubricant. In addition, it does not absorb fouling like other surfaces, so you'll be able to clean your BCG much quicker.
Installing this component on your AR15 will give you the advantage of the Phase 5 Tactical brand and the incredible benefits of electroless nickel plating!
The Reason Why Phase 5 Tactical Does Not Stake Their Gas Keys:
"The US Mil-Spec assembly drawing requires the carrier key to be staked. Contrary to some popular opinions staking does not “SEAL” the gas key. Staking keeps the screws from backing out Period.
If you do not properly torque the screws to 56 inch pounds you will be staking a screw that is loose or one that is over torqued and prone to breakage. We have seen plenty of staked screws that are loose or broken."
**Phase 5 Tactical install the key and torque every screws to 56 inch pounds. Since the gas keys were not stake, you have the option to remove the gas key. (i.e. replace with a pistol key.) When you put the new key on, do not use the old screws, go buy new 10-32 x ¼" SHCS from you local hardware stores. If you use the old screws, you will most likely break them during installation or when you fire the rifle.