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Description
WMD Guns NIB-X Nickel Boron upper receiverThe WMD NiB-X Stripped Upper Receiver features their trademarked NiB-X coating inside and out for a tough, harder than chrome surface that is extremely corrosion resistant and highly lubricious for outstanding wear resistance. Machined from 7075-T6 forgings, this upper includes M4 feed ramps for reliable feeding, and accepts all standard AR-15 upper receiver parts and barrels.WMD GUNS Nickel Boron coating is known as the industry standard for Nickel Boron. They were one of the first companies to offer Nickel Boron to the community and continue to produce the best Nickel Boron products on the market. With top tier companies like Spike's Tactical utilizing their plating services you can't go wrong.Features:Machined from 7075-T6 Aluminum forgings with M4 feed rampsNiB-X coating gives surface a Rockwell Hardness of Rc70High-lubricity allows smoother metal-on-metal interaction and reduced wearHighly corrosion resistantSlick surface makes cleaning easierAccepts all standard AR-15 upper receiver components NIBXUAdd a plain or engraved port door + forward assist kit from the drop down menu. See reference "CHART A" tab above.
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Comments (4)
Do these tarnish the same way the NIBX bolts do? Should I expect it to eventually be black from regular use?
Nickel does tarnish, yes. Part of the reason the BCGs turn dark color with use is due to the heat and gas exposure from the gas impingement system.
It’s still really slick and offers an easy to clean finish. WMB also offers a black version with this coating.
If you want something that is slick and hell, easier to clean than Nickle Boron, and will not tarnish, look at Nickle Teflon treated uppers. Right to Bear also has those in stock now and then.
So, the finish on these doesn’t hide as much of the aluminum imperfections as anodizing or Cerakote, but MAN they are easy to keep clean. Probably too much bling for a lot of folks, but I really like them.