WMD Ni-Bor Bolt Carrier Group BCG M16 M-16 Faceted
AR-15 AR15 Nickel Boron NiB-X Nickle
Factory New Condition
FFL is not required
Current Bid
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Time Left 15 min rule
Item has Ended
8/10/2017 5:21 PM
Item 680337134
Location Darien, WI 53114
Buyer pays estimated shipping for the following option(s): Priority
No international shipments
Payment Personal Check, Visa / MasterCard, Discover, USPS Money Order, Money Order, Certified Check
Checkout Yes, Immediate
Sales Tax
Seller must collect sales tax from the following states:
WI 5.5%   
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.

Please read the Additional Terms of Sale for important listing details.

WMD M-16 NiB-X Bolt Carrier Group Faceted
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About Us

Top Notch Top Ends is Firefighter and family operated. We have been open for civilian sales since 2010. All TNTE uppers are custom built using exacting tolerances by highly trained armorers. Your receiver and barrel are torqued to a spec of 55-65 +/- for best accuracy. Then your feed ramps and chamber are polished and de-burred. All uppers are checked for proper head-spacing and test fired to ensure reliability. Beware of sellers who refuse to tell you where their parts come from because all uppers are not created equal. We use only Milspec or higher quality parts for your upper. TNTE uppers are built with professionals in mind, we go through them with a fine tooth comb to make sure when you need it most it will be there for you. Feel free to contact us for quotes and to inquire about our Military, Law enforcement, and FD discounts or call us at 262-749-1370. Our custom uppers are covered by a one year warranty. Click here for our uppers.

Dealers, contact us directly here.

Item Description

Drop-In AR-15 BCGs to increase reliability and ease cleaning and maintenance.

  • Bolt – Carpenter 158 case hardened, shot peened and magnetic particle inspected. Manufactured to Government drawings. Mil Spec gas rings. NiB-X coated (40% more wear resistant than Chrome).

  • Extractor – Manufactured, heat treated, hardened, per Government drawings. Black extractor buffer and heavy duty spring. NiB-X coated.

  • Firing Pin – Manufactured, heat treated, hardened, Chromed and certified per Government drawings.

  • Carrier – M16 style carrier (heavy weight), 8620 material, heat treated and case hardened. Manufacturing tolerances on inside diameters tightly controlled. NiB-X coated for durability and ease of cleaning. Faceted Style.

  • Gas Key – Hardened to USGI Specifications and attached using grade 8 hardened fasteners. Permatex No. 3D Aviation Form a gasket Type III Sealing Compound per MIL-S-45180 used on assembly. NiB-X coated. Staked per military specifications.

  • Cam pin – Manufactured, heat treated, hardened and certified per Government drawings. NiB-X Coated.

Payment Details

Payment Options:

Please use the GB checkout for all auctions as it helps prevent shipping mistakes.

If you would to make payment by check or money order, please make payment out to:

Top Notch Top Ends.

There is a 10 business day hold on all checks (inc. certified) and non USPS Money orders.

Credit Cards are accepted without any credit card fee.

Please contact us within four days of auction end to confirm your order. If payment is not received within 5 days, a payment reminder will be filed unless you have contacted us to make other arrangements. If payment is not received in 10 days, bidder forfeits all rights to item and a Non Paying Bidder notice will be filed unless other arrangements have been made.

Shipping Details

We ship via UPS for uppers. Small parts go out USPS. YAHOO EMAIL USERS WILL HAVE TO CHECK THEIR SPAM FOLDER FOR TRACKING INFORMATION, OR CONTACT US FOR TRACKING INFO. WE ARE SORRY FOR THIS BUT YAHOO SPAM HAS AN ISSUE WITH USPS. Please watch your GunBroker email inbox and spam folder for tracking information. Due to very high demand, processing time is taking between 7-10 business days. Please be patient and we will get your item out to you.

Additional Information

We ship to California as long as the item is legal!!!

WARNING: It is buyer's responsibility to make sure the item is legal to own. We will not ship items to a state or locale where possession is illegal. Please check your State, County and City laws for restrictions before ordering Firearm Parts. This item is considered gun parts and can be shipped to the buyer's home address. No FFL is required for purchase. We are dealers for Adams Arms, Anderson Manufacturing, Midwest Industries, CMMG, WMD Guns, Rainier Arms, DANIEL DEFENSE, YHM, UTG/LEAPERS, DPMS, High Standard, Samson, Troy, Ka-Bar, Ontario, SOG, and DEL-TON arms so please email us with any and all of you parts requests, except for lower receivers. We are also selling other sporting goods. If there is something you are looking for let us know and we will try to help you.



Our stripped custom uppers carry a one year warranty. We will repair and or replace any upper that is defective due to manufacturer defect. If the problem is caused by customer components (ie. customer supplied BCG, Charging handle, etc.). Customer will be responsible for all shipping costs, charged for all repairs, parts, ammunition, and shop time at our current rate. Current rate is $55 per hour with a minimum one hour charge.

Returns Policy

You may return most new, unopened items within 30 days of delivery with a 15% restocking fee. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). All cancellations of uppers are subject to a 20% restocking fee. Uppers are non-returnable & non-refundable.
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).


Your feedback is important to us. Please let us know how we did and we will gladly return the favor.

Hours of operation

We are open Tuesday through Friday 10 am to 6 pm central time. Saturday 10 am to 4 pm. Closed on Sunday and Monday.


We are more than happy to answer any and all questions. Most common questions are usually answered in the auction listing. If you ask us a question using the GB messaging system, please include a return email address or phone number with your name in your message. Unfortunately, the GB messaging system does not always work right and some replies bounce back to us.

Auction listing templates
Auction listing templates at BiggerBids.com.
Please review the shipping details for estimated time of shipment. Upper receiver groups typically ship in 15-30 business days (3-6 weeks) YHM uppers may take up to 12 weeks to ship. BCG's and BCG Kits take 7-10 business days to ship. Guntec & UTG parts may take up to 10 business days to ship. Most other parts are taking 5-7 business days to ship. These approximate timeframes and may take less or more time to ship. Please be patient and we will get your order out to you.
Mfg Part Number