WMD NIB-X 9mm AR Pistol - 5.5''

Manufactured by WMD Guns
SKU: 1-9MMPistol-5.5
MPN: 1-9MM Pistol
Manufactured by WMD Guns
1 Review
Click Here for Price $849.99 $899.99

In Stock

Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

Items that are regulated by the ATF have restrictions and requirements: 
•Your entire order will ship only to a Federal-Firearm License holder.
•Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
•A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



WMD guns is most notably know for their proprietary Nib-X coating that they put on anything from bolt carrier groups to barrel extensions, and triggers. This Nickel Boron finish is extremely hard and smooth making it great for components that experience a lot of friction during use. Well, now you can get a 9mm AR-15 pistol that features this Nickel Boron finish on not only those important parts, but on almost every single metal surface. Other than the obvious, this WMD 9mm AR Pistol features a 5.5” match grade barrel made from Chrome Moly Vanadium Steel. The barrel is salt bath Nitrided but the extension is Nib-X coated for smooth function with the Nib-X BCG. The free float handguard features picatinny rails and extends to the very end of the barrel where the compensator is attached. The handguard is machined from 6061 aluminum while the receivers are made from 7075 aluminum and of course, all three are Nib-X coated. A Nickel Boron gun is a happy gun.

  • 5.5” 9mm Nitride barrel
  • Barrel extension – Nib-X
  • 17-4 PH stainless steel compensator
  • 6061 aluminum free float handguard – Nib-X
  • 7075-T6 aluminum billet upper and lower receivers – Nib-X
  • Glock magazine compatible
  • 9mm bolt – Nib-X
  • Two stage trigger – Nib-X
  • Carbine buffer with pistol buffer tube
  • Ergonomic pistol grip

The dedicated 9mm lower receiver is designed for Glock magazines and features an integrated magazine release. The billet lower also has features like an integrated trigger guard and slim magwell. It features a standard lower parts kit but comes with the Nib-X coated two stage trigger that is extremely smooth with a clean break. Complete with an ergonomic pistol grip and knurled buffer tube, this blowback activated AR-15 pistol is a blast to shoot.

WMD Guns has established a reputation of excellence based on extensive firearms and defense industry experience, plating expertise, and gunsmithing capabilities. They are innovators in nickel boron products for the firearms industry and the sole source of the NiB-X nickel boron coating process.
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Barrel CoatingSalt Bath Nitride
Barrel Length5.5
BrandWMD Guns
Caliber Gauge9mm Luger
Frame SizeAR Pistol
Gas System LengthBlowback
Gas System TypeBlowback
Muzzle DeviceCompensator
Twist Rate1:10

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see www.p65warnings.ca.gov

Ratings & Reviews

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My observations

by -

1-Appears to be a solid build
<br>2-Package arrived at FFL with absolutely no padding, left to bounce around in an oversized box. The FFL was concerned and went as far as to urge me to test fire before any sort of warranty ran out. I'm not impressed at all with the care shown for what I paid.
<br>3-WMD stats Magpul 9mm glock magazines are recommended. I order 3 21 round mags and loaded each to max. Magazine will not lock in place while bolt is closed. I removed 1 round each to see if that'd work. After several slaps the mag locked in. This could be problematic in certain circumstances. However for my purposes it not a bug deal. I have several other self defense weapons that operate flawlessly.
<br>All just my initial thoughts.