5.56 223 Bolt Carrier Group Nickel Boron BCG 6aNN
Factory New Condition
FFL is not required
Current Bid
BuyNow! Price Was
Starting Bid
No Reserve!
1 Bids Bid History
Time Left 15 min rule
Item has Ended
8/9/2017 1:05 PM
Item 678942232
Location Hartland, WI 53029
Priority Mail$9.99
No international shipments
Payment Personal Check, Visa / MasterCard, American Express, Discover, PayPal, USPS Money Order, Money Order, Certified Check, See Item Description
Checkout Yes
Sales Tax
Seller does not collect sales tax
Inspection/ Return Policy

The seller of this item assumes all responsibility for this listing. You must contact the seller to resolve any questions or concerns before placing a bid. Payment must be made using U.S. dollars ($) unless otherwise stated in the listing. Firearms may only be shipped to a licensed dealer (FFL Holder). Some listed items may not be legal in every state. Complete your purchase within the law.

Complete match grade .223/5.56x45 bolt carrier group. Nickel Boron Carrier & Bolt.



  • Match grade! ALL components are made IN HOUSE so we can control tolerances.

  • BCG Material

  • Carrier key staked with original COLT Full-Auto MIL-SPEC screws. These are purpose made, for us. This is a special steel alloy, with a special heat treat process. These are not readily available "Class 8" screws from say, McMaster-Carr or Grainger or something. These will NOT shear off (which I have seen happen on competitors gas keys.)

  • Highest quality steel used in the extractor and ejector springs; exceeding MIL-SPEC. Purpose made, exclusive, to us.

  • Full-auto reliability ring VITON rubber.

  • Extractor spring with VITON rubber reliability post, Purpose made, exclusive, to us.
  • This is NOT an NFA licensed part, but does have full auto cuts.

  • Completely assembled and ready to put in your gun!

  • Although NiB has a very low coefficient of friction, we recommend a small amount of lubricant on bolt to carrier surfaces, even if it is a dry lube.


  • Quick, Easy and Secure.


  • We NEVER see your credit card number..

  • Pay by money order and we will deduct $5.00 from your total price!

  • No credit card transaction fees!

  • 30 day, 100% Money Back Guarantee.

  • See our ONE YEAR warranty below.

  • Actual product may vary slightly from those pictured, i.e. may have engravings or hardware coating variations. The main carrier and bolt will always be as listed.

308 BCG



When this auction ends, it automatically re-lists. If you have won the auction, do not panic when the auction re-lists. You are getting your parts. There is no error, please do not "re-buy" parts, unless you want more than one (which you can just tell us by email.)

ALL parts are designed for the tolerance of surface finish, and every single piece is coated and/or finished. Fits almost every AR15 out there. Also fits POF (Non-piston guns), Knights Armament (with proper barrel extension headspace.) You CAN NOT take off the shelf bolt parts, plate them, and expect it to work properly. With the surge of gun sales in the recent years, and component shortages, there were and are, many machine shops that got into this marketplace without a clear understanding firearm assemblies or even how firearms work, or what these parts do. If you don't get it from us, please purchase from a reputable company.


Info on Nickel Boron (NiB):

Drop-in bolt and carrier group has a hard Nickel Boron self-lubricating surface that eliminates the need to apply oil or grease that can attract dirt, dust, unburned powder, and carbon and lead to cycling failures. We still recommend you use lubrication with this BCG. A thin film of oil will go a long way to enhancing function and increasing longevity of your receiver, which is aluminum.

Nickel Boron finish produces an exceptionally hard surface (68 Rockwell C) that’s 40% more wear resistant than chrome plating, with an ultra-low friction coefficient. The surface finish is actually harder than the substrate underneath and will not peel, flake, gall, or rub off. NiB bolt/carrier groups have been tested to function reliably without additional lubrication up to 50,000 rounds. Reduced friction also means less heat generated by metal-on-metal contact, so the gun runs cooler and parts last longer. Easy to clean, too - fouling brushes right off. Gas key is hardened to USGI specs, NiB lined to resist erosion, and comes already staked to the carrier. Complete Bolt/Carrier Group comes fully assembled and ready to drop into almost any upper receiver.

Bolt Lube Locations


Limited Warranty

Subject to the terms of this Limited Warranty, the Company warrants to the original purchaser (the "Purchaser") of its "Bolt Carrier Group" products (each a "Product" and collectively the "Products") that the Products will (i) conform to their specifications, (ii) be free from defects in material or workmanship, and (iii) will not break or otherwise fail under normal use and service, for the duration of this Limited Warranty. This Limited Warranty shall be null and void and of no force or effect if, in the Company's reasonable judgment, the Products are: (a) altered or modified, (b) handled or stored improperly, (c) not properly installed or incorporated in the weapon or firearm in which it is utilized, and/or (d) the Product is abused, misused, or otherwise suffers damage as a result of weather, natural disaster, exposure to chemicals, exposure to excessive heat, excessive wear and/or abnormal environmental conditions (each an "Event of Default.")


Seller provided no "Additional Terms of Sale"
Mfg Part Number
1.20 Pounds