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WMD Guns NiB-X Lower Parts Kit, Mod 3

Was: $107.99
Now: $89.99
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Even minor changes to an AR's lower parts kit can make someone get more out of their shooting experience. This lower parts kit by WMD Guns is mil-spec save for one detail: the trigger, hammer, and disconnector have all been coated in nickel boron. Their NiB-X coating creates a smoother trigger operation. No more gritty feel to your trigger pull.

What's Included:

  • Hammer, NiB-X coated (nickel boron)
  • Trigger, NiB-X coated (nickel boron)
  • Disconnect, NiB-X coated (nickel boron)
  • Bolt Catch, Nitromet-coated (melonite)
  • Mag Catch, Nitromet-coated (melonite)
  • Mag Catch Button, Nitromet-coated (melonite)
  • Safety Selector, Nitromet-coated (melonite)
  • Front Pivot Pin, Nitromet-coated (melonite)
  • Rear Takedown Pin, Nitromet-coated (melonite)
  • All necessary detents and springs

WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to:

Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.


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We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.