WMD Guns AR-15 Lower Parts Kit with NiB-X Nickel Boron Trigger Group

WMD Guns AR-15 Lower Parts Kit with NiB-X Nickel Boron Trigger Group

Product Code:
Calculated at Checkout
$85.00 $69.85



  • Made in the U.S.A.
  • NiB-X Nickel Boron trigger group
  • NiB-X coating for extreme durability, performance and reliability
  • Nitromet (Melonite) parts for corrosion resistance and true black appearance
  • Fits all Mil-Spec AR-15 / M16 lower receivers
  • Does not come with pistol grip


  • AR-15 lower receiver

Available in Mod1 and Mod3 configurations:

  • Mod1: Mil-Spec lower parts with NiB-X Nickel Boron fire control group
  • Mod3: Mil-Spec lowers parts with NiB-X Nickel Boron fire control group; Nitromet bolt catch, mag catch, mag catch button, front pivot pin, rear takedown pin, and safety selector.


  • 1x Takedown Pin
  • 1x Receiver Pivot Pin
  • 2x Takedown Pin Detent
  • 2x Takedown Pin Detent Spring
  • 1x Bolt Catch
  • 1x Bolt Catch Plunger
  • 1x Bolt Catch Roll Pin
  • 1x Bolt Catch Spring
  • 1x Buffer Retainer
  • 1x Buffer Retainer Spring
  • 1x NiB-X Hammer
  • 1x NiB-X Trigger
  • 1x Hammer Pin
  • 1x Trigger Pin
  • 1x Hammer Spring
  • 1x Trigger Spring
  • 1x NiB-X Disconnetor
  • 1x Disconnetor Spring
  • 1x Magazine Catch
  • 1x Magazine Catch Spring
  • 1x Magazine Release Button
  • 1x Safety Selector
  • 1x Selector Detent
  • 1x Selector Detent Spring
  • 1x Pistol Grip Screw and Washer
  • 1x Trigger Guard and Roll Pin


When you build a new AR-15 there are a lot of small Parts you need to complete your lower receiver. You could check each one off as an individual choice, check compatibility, and assemble it yourself, but there’s an easier way. If you choose an AR lower parts kit from Wing Tactical, you can be sure you have everything you need without a lot of extra hassle or worries about compatibility. If you want a Nickel Boron lower parts kit, the WMD Guns NiB-X lower parts kit will fit the bill without making it hard to pay yours.

An AR Lower Parts Kit Will Make Your Build Easier

WMD’s Nickel Boron lower parts kit has everything you need to complete your AR-15 lower. Wing Tactical offers two versions of the NiB-X lower parts kit. Mod 1 features a NiB-X fire control group. NiB-X coating protects your trigger, disconnect, and hammer to protect those crucial parts from wear and keep them moving smoothly. Mod 2 features the same great NiB-X parts, plus, the essential components are Nitromet coated for great wear and improved friction resistance.

Two Great Next Generation Finishes

When you buy WMD Guns’ NiB-X and Nitromet plated parts from Wing Tactical you aren’t getting run-of-the-mill nickel boron and melonite coatings. You’re getting next level finishes.

WMD’s NiB-X is the hardest nickel boron plating on the market today, thanks to WMD’s proprietary process and the exclusive solution they’ve blended to create the most consistent, even plating on any shaped part.

Nitromet is a harder, more durable melonite finish that promises to outlast mil-spec and anodized finishes in most applications. When you choose WMD parts with advanced coatings from Wing Tactical you give yourself a lasting edge.

Write a Review

2 Reviews

  • Lower parts kit

    Posted by Chris on 6th May 2020

    Nice kit, no issues at all.

  • I love the trigger

    Posted by Unknown on 21st Apr 2018

    Everything in the kit fit easily, except for the Mag release roll pin, which I had to sand down a touch. I didn't penalize the product, because it could have been the receiver at fault. I like the look and feel of the nitromet coatings and think they are worth the upgrade cost. Finally, I love the trigger group in this kit. There is very little creep and the break is crisp. I'm confident that I'll be able to shoot very well with this trigger.

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