• FAST & FREE SHIPPING ON EVERY ORDER
  • WISH LIST
  • CONTACT US
  • FAST & FREE SHIPPING ON EVERY ORDER
Milspec Retail
Login / Register
0 Compare
0 items / $0.00
Menu
Milspec Retail
0 items / $0.00
Browse Categories
  • AR Parts

    • LOWER PARTS
      • Bolt Catches
      • Buffer Tubes
      • Endplates
      • Lower Parts Kits
      • Magazine Releases
      • Pistol Grips
      • Rifle Buffers
      • Rifle Triggers
      • Safety Selectors
      • Trigger Guards
      • Stocks and Braces
    • UPPER PARTS
      • Bolt Carrier Groups
      • Charging Handles
      • Compensators
      • Complete Uppers
      • Flash Hiders
      • Forward Assists
      • Gas Blocks
      • Gas Tubes
      • Muzzle Devices
      • Rails
      • Rifle Barrels
      • Upper Receivers
    NEWLY ADDED
    • BRT Micro Pin Gas Block - .750" $59.95 $56.96
    • Multitasker M:4 Tool $34.95 $29.95
    • Bootleg Billet Upper Receiver for AR-15 / M4 $189.95 $179.95

  • AK Parts
  • Pistol Parts
    • Pistol Barrels
    • Pistol Compensators
    • Pistol Lights
    • Pistol Magwells
    • Pistol Sights
    • Pistol Slides
    • Pistol Triggers
    • Pistol Slide Stops & Releases
    • Pistol Magazine Base Plates
  • Shotgun Parts
    • Shotgun Forends
    • Shotgun Grips
    • Shotgun Optic Mounts
    • Shotgun Stocks
    • Shotgun Triggers
  • Firearm Accessories

    • CONTROL
      • Bipods
      • Hand Stops
      • Finger Stops
      • Rail Covers
      • Vertical Grips
      • Angled Grips
    • OPTICS
      • Sights & Optics
      • Optic Mounts
      • Iron Sights
    • ILLUMINATION
      • Weapon Mounted Lights
      • Weapon Light Mounts
      • Pressure Switches
      • Switch Mounts
      • Pistol Lights
      • Handheld Lights
    • TOOLS
      • Multitools
      • Gunsmithing Tools
    NEWLY ADDED
    • HRF Concepts RCM Rifle Combat Magwell for MCX $57.00 – $62.00
    • Badger Ordnance Condition One 34mm Scope Mount – 1.54″ $318.00
    • American Defense AD-RECON-X Extended 30mm Scope Mount - Standard Lever $220.00 $211.39

  • Tactical Gear
    • Back Packs & Bags
    • Chest Rigs
    • Medical
    • Plate Carriers
    • Pouches
    • Slings
    • Training Tools
  • SHOP
    rifle-parts-vert-copy

    RIFLE PARTS

    pistol-parts-vert

    PISTOL PARTS

    gear-vert-1

    GEAR

    accessories-vert

    ACCESSORIES

  • BRANDS
  • NEW ARRIVALS
  • UPDATES
MIL/LE DISCOUNT
  • SUPPORT
    • Contact Us
    • Order Info
    • Track Order
    • Start a Return
    • Cancel Order
-5%OUT OF STOCK
Click to enlarge
Home AR Parts Upper Parts Bolt Carrier Groups SIONICS Bolt Carrier Group for .223/5.56- NP3
SIONICS Weapon Systems

SIONICS Bolt Carrier Group for .223/5.56- NP3

$219.95 $209.95

SIONICS Bolts are manufactured from Carpenter 158® Steel. NP3 coated Cam Pin – With the use of Ned Christiansen’s OCKS (Optimized Carrier Key Screws).

  • 100% HP/MPI Tested
  • Shot Peened
  • Sprinco 5-Coil Heavy Duty Extractor Spring
  • Black Insert
  • Nickel PTFE Carrier

Out of stock

Get notified when this product is in stock

FREE Shipping in the USA  |   FREE 30 Day Returns

Compare
Add to wishlist
SKU: NP3BCG Categories: AR Parts, Bolt Carrier Groups, Upper Parts
Share:
  • Description
  • Additional information
  • Shipping & Delivery
Description

Complete Bolt Carrier Group – HP/MPI Tested – Carpenter 158 NP3 Coated Bolt and NP3 coated Cam Pin – With the use of Ned Christiansen’s OCKS (Optimized Carrier Key Screws).

  • 100% HP/MPI Tested
  • Shot Peened
  • Sprinco 5-Coil Heavy Duty Extractor Spring
  • Black Insert
  • Nickel PTFE Carrier

SIONICS Bolts are manufactured from Carpenter 158® Steel. Each Bolt is HP/MPI Tested and Inspected. Each Bolt is Shot Peened and comes with a Sprinco Heavy Extractor Spring and Black Spring Insert. The Bolt and Cam Pin with the exception of the Extractor have been NP3 treated to enhance Corrosion Resistance and Carbon build-up.

SIONICS M16 profile Bolt Carriers are machined to USGI specifications. The M16/M4 carrier includes a Mil-Spec Gas Key. The Gas Key is heat treated per USGI specifications and NP3 Coated. The Gas Key is secured to the carrier via OCKS (Optimized Carrier Key Screw) and properly staked using a MOMOAKS. These properly hardened parts insure a strong staking and proper gas system function. Furthermore, the mating surface between the carrier and the gas key is

Each Carrier Assembly is treated with a durable Nickel/PTFE plating which creates a permanently lubricious surface that reduces the need for lubrication.

NP3 has a coefficient of friction as low as .07-.1 according to test standards LFW-1 and ASTM D-2714. Nickel Boron has a coefficient of friction as low as .08-.2. NP3 has PTFE also known as Teflon® co-deposited in the nickel matrix. As wear occurs, new PTFE particles are exposed and the self-lubricating properties continue. Nickel boron has a surface with many high points. Because the high points make all the contact, there is less surface area for friction to occur. The problem with this is once the high points wear down the coefficient of friction increases due to more surface area being contacted. With no self-lubricating particles like Teflon® in the Nickel Boron matrix, there is no additional lubrication after the contact points are worn. The bottom line is that if you see wear on Nickel Boron, it has lost its “Self Lubricating” properties at that spot.

Regarding cleaning, NP3 is easy to clean for the same reason that a pan with Teflon® is easy to clean. Teflon® is non-stick and easy to wipe down, therefor carbon does not adhere to the surface. Nickel Boron has many ridges to catch carbon fouling. The ridges in Nickel Boron are smaller than the ridges in Manganese Phosphate that act as a sponge for oil, so compared to Manganese Phosphate, Nickel Boron is easier to clean. This is the same as comparing a railroad spike to a nail in your tire. One is definitely worse than the other, but both will impede function.

Regarding Corrosion Resistance, NP3 has great corrosion resistance twice the amount of Nickel Boron. Nickel Boron is at the same level of corrosion resistance as regular Nickel or Chrome.

Note from manufacturer:

“In our opinion, there is NO comparison between an NP3/Electroless Nickel PTFE Coated Surface and Nickel Boron Coated Surface. After coating tens of thousands of Bolts and Carriers with NP3 over the years, we have NEVER seen one flake. That cannot be said about Nickel Boron Coatings. Close to seven years ago, we were provided the following information which has always proven to be accurate.”

DISCLAIMER:

Due to the inherent nature of NP3 Coating, Tooling Marks may be present on SIONICS NP3 Coated Bolt Carrier Groups. Tooling marks are COSMETIC and have ZERO effect on function. Being that the NP3 Coating impregnates into the host material, it is much thinner and much less forgiving in hiding Tooling Marks. Other popular coatings such as Phosphate and Nitride are thicker and darker in appearance, allowing for Tooling Marks to be easily concealed. Regardless of Tooling Marks present on SIONICS NP3 Bolt Carrier Groups, every SIONICS Bolt Carrier Group is backed by our Lifetime Warranty that covers any Manufacturer Defect that would effect function.

 

Additional information
Brand

SIONICS Weapon Systems

Material

Carpenter 158

Finish

NP3

Caliber

5.56 NATO / .223 Remington

Firearm Compatibility

AR-15 / M4 / M16

Shipping & Delivery

FREE, FAST SHIPPING

We offer fast, free shipping on every US order. Most orders less than $100 will ship via USPS. Orders exceeding $100 will ship 2 or 3 Day FedEx. You can upgrade any order to 2-Day or Overnight during checkout for an additional charge.

To get your order shipped out same day, checkout before 1:00 PM Pacific time (4:00 PM Eastern).

INTERNATIONAL

Milspec Retail offers worldwide shipping on hundreds of products. However, due to the nature of our business, many products are restricted from export. These items will not be sold to customers located outside of the USA.

Related products

Compare
Add to wishlist
Add to cart

Rosco Manufacturing 20″ .223 Wylde Purebred Barrel (1/7 Twist)

$230.00
Compare
Add to wishlist
Select options

Arisaka Defense Low Profile Picatinny Rail – M-LOK

2 reviews
$27.00 – $30.00
OUT OF STOCK
Compare
Add to wishlist
Select options

Geissele Super Precision Scope Mount – 30mm – Standard Height

2 reviews
$325.00 – $350.00
-10%
Compare
Add to wishlist
Select options

Reptilia CQG Grip for AR-15/SR-25, SIG MPX/MCX & FN SCAR

9 reviews
$17.96 – $19.95
OUT OF STOCK
Compare
Add to wishlist
Select options

RailScales XOS-H Type 1 Rail Covers

$58.00
OUT OF STOCK
Railscales
Compare
Add to wishlist
Select options

RailScales High Temp Polymer HTP Scales for M-LOK

Rated 5.00 out of 5
3 reviews
$30.00
OUT OF STOCK
Compare
Add to wishlist
Select options

Geissele Super Precision Scope Mount – 30mm – 1.93″ Height

$325.00 – $350.00
OUT OF STOCK
Compare
Add to wishlist
Select options

RailScales G10 Rail Scales

$28.00
Aero Precision
Arisaka Defense
Bravo Company USA (BCM)
Emissary Development
Esstac
Ferro Concepts
Geissele Automatics
HRF Concepts
Modlite Systems
Reptilia Corp
SCALARWORKS
Unity Tactical
milspec

The VIP lounge of gun parts and firearm accessories.

Contact us with any questions or inquiries:

Message Us
Phone: (323) 400-2858
Panorama City, CA 91402
SHOPPING
  • Products
  • Brands
  • New Arrivals
  • Sale Products
  • RFQ Bulk Purchasing
CUSTOMER SUPPORT
  • Order Info & Policies
  • Track Order
  • Start a Return
  • Cancel Order
  • Privacy Policy
  • Export Restrictions
COMPANY
  • Contact Us
  • Customer Reviews
  • About Our Company
  • MIL/LE Discount
  • Apply as Vendor
  • Careers
MILSPEC RETAIL COPYRIGHT 2022
visa mastercard amex discover
  • Menu
  • Categories
  • AR Parts
    • Blast Shields
    • Bolt Carrier Groups
    • Braces
    • Buffer Tubes
    • Charging Handles
    • Compensators
    • Complete Uppers
    • Endplates
    • Flash Hiders
    • Forward Assists
    • Gas Blocks
    • Gas Tubes
    • Lower Parts
    • Lower Parts Kits
    • Magazines
    • Mag Releases
    • Mag Extensions
    • Muzzle Devices
    • Muzzle Brakes
    • Pistol Grips
    • Pistol Grips
    • Rails
    • Rail Covers
    • Rail Sections
    • Rifle Barrels
    • Rifle Buffers
    • Rifle Stocks
    • Rifle Triggers
    • Safety Selectors
    • Stocks & Braces
    • Trigger Guards
    • Upper Parts
    • Upper Parts Kits
    • Upper Receivers
  • AK Parts
  • Pistol Parts
    • Base Plates
    • Compensators
    • Magwells
    • Pistol Barrels
    • Pistol Magazines
    • Pistol Sights
    • Pistol Slides
    • Pistol Triggers
  • Shotgun Parts
    • Shotgun Forends
    • Shotgun Grips
    • Shotgun Optic Mounts
    • Shotgun Stocks
  • Firearm Accessories
    • Bipods
    • Grips
    • Finger Stops
    • Hand Stops
    • Lights & Lasers
    • Magazines
    • Sights & Optics
    • Weapon Mounted Flashlights
    • Weapon Light Mounts
  • Tactical Gear
    • Bags & Packs
    • Chest Rigs
    • Medical
    • Plate Carriers
    • Pouches
    • Slings
    • Training Tools
  • MAIN SHOP
  • BRANDS
  • NEW ARRIVALS
  • SUPPORT
    • Contact Us
    • Order Info
    • Track Order
    • Start a Return
    • Cancel Order
  • MIL/LE DISCOUNT
  • Compare
  • Login / Register
Shopping cart
close

Sign in

close

Lost your password?
Or login with
Facebook
Google

No account yet?

Create an Account

FREE SHIPPING TRANSIT TIMES

2-3 DAYS

  • Order value is $100 or more.
  • Shipping address is in the USA.
  • Some large and heavy products excluded.
  • Delivery days do not include Saturday, Sunday, and legal/postal holidays.

3-5 DAYS

  • Order value is under $100 or contains large/heavy products.
  • Shipping address is in the USA.
  • Delivery days do not include Saturday, Sunday, and legal/postal holidays.