Sionics Weapon Systems M16 5.56 Bolt Carrier Group - NP3 Coated

Manufactured by Sionics Weapon Systems
Manufactured by Sionics Weapon Systems
2 Reviews

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The Sionics Weapon Systems NP3 Coated AR-15 Bolt Carrier Group features an M16 profile and is built for duty use. The bolt itself is machined from Carpenter 158 tool steel, is high pressure tested, magnetic particle inspected, and shot peened. Additionally, each bolt features a Sprinco 5-coil heavy duty extractor spring with black insert to ensure long term reliability. The gas key is heat treated per GI specifications and is secured with properly staked grade 8 screws. The entire bolt carrier group is Nickel NP3 coated decrease friction to reduce wear and make cleaning a breeze.

  • M16 profile
  • Nickel NP3 coated
  • Carpenter 158 bolt
  • Sprinco heavy duty extractor spring
  • Black insert
  • High pressure tested
  • Magnetic particle inspected
  • Shot peened bolt face
  • Staked gas key

A SIONICS Weapon System is a firearm that is more than just built from the ground up by master gunsmiths for professionals in the field. They're more than just an assembly of quality components. Every firearm built by SIONICS has been carefully crafted from the best components available by a single master gunsmith before a second master gunsmith puts it through a 19-point quality inspection and test firing process to ensure that ever SIONICS firearm has been built without compromise.
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Bolt FinishNickel NP3
Bolt MaterialCarpenter 158 Steel
BrandSionics Weapon Systems
Caliber Gauge5.56 NATO
Carrier FinishNickel NP3
Carrier Material8620 Carpenter Steel
Carrier StyleM16 Bolt Carrier
High Pressure TestedHigh Pressure Tested
Magnetic Particle InspectMagnetic Particle Inspected

Ratings & Reviews

2 reviews

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Quality under the Radar


If you are not familiar with Sionics, do your homework! They are an OEM for over 70 law enforcement agencies. They hand build every rifle, and I have been really impressed with their work over the years. I've had a Sionics upper with this NP3 BCG for several years now, and out of all that I own and run, it's the one I rely on the most. I run suppressed, unsuppressed, crap ammo, good ammo, classes, etc. It has been flawless and easy to clean. I prefer this particular BCG even for my budget builds. You can skimp on a quality budget lower from someone like Aero on a sale, but use high-end internals such as this to get reliability.

It's nickel teflon what more do you need?

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I had to purchase this to go with my np3 upper, but even if I hadn't purchased that upper i'd have bought one. It's the only bcg i've seen that actually cares enough to install a sprinco 5 coil and OCKS screws as every company should. I put a sprinco ejector spring in it as well. This feels slicker than nickel boron or dlc. One of the main reasons I had to try it was because of the difference in the feel of a Schmid nickel teflon mil spec trigger group vs a nickel boron.
<br>Hopefully this was a better choice than hard chrome.