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Building an AR-15 lower receiver gets a lot easier when you have quality parts organized and ready to go. The CMMG ZEROED Lower Parts Kit gives you everything you need to finish an AR-Platform or Mk4 lower receiver without the hassle of hunting down individual components from different suppliers.
Made entirely in the USA, this kit comes with parts grouped in color-coded packets that make assembly straightforward. You get the complete fire control group with trigger, hammer, disconnector, and all related springs and pins. The safety is a 60 degree to 90 degree adjustable ambidextrous selector that works from either side of the receiver, which is useful whether you're left-handed or just prefer having controls available on both sides. The kit also includes an ambidextrous magazine catch so you can drop magazines quickly from your dominant or support hand.
Every component meets or exceeds mil-spec standards. You'll get the extended bolt catch assembly, all necessary pins and detents, HD pivot and takedown pins, the black ZEROED polymer grip with hardware, trigger guard with screws, magazine catch and release button, buffer retainer with spring, and every small spring and pin you need for assembly. All installation hardware is included.
Since these parts are made in the USA and designed to mil-spec or better, you're getting components built to handle real use. The extended magazine release button and extended bolt catch give you faster operation during reloads and magazine changes. The HD pivot and takedown pins are beefier than standard, making field takedown easier and more reliable.
You'll need a buttstock or brace kit to complete your build, but this kit covers all the lower receiver internals you need. Whether you're building a rifle or pistol configuration, the ZEROED kit gets your lower finished right.
This ZEROED kit is designed for AR-Platform and Mk4 lower receivers. All components are mil-spec or better and will work with standard mil-spec lowers. If you have a proprietary lower from another manufacturer, check with that maker to confirm compatibility with mil-spec parts kits.
You'll need a buttstock or brace kit to finish your build, depending on whether you're building a rifle or pistol configuration. This kit includes all the internal parts and controls for the lower receiver itself. You'll also need an upper receiver and upper assembly to create a complete firearm.
The ambi safety and mag catch let you operate controls from either side of the rifle without moving your hand or changing your grip. Left-handed shooters benefit significantly, but right-handers also appreciate the faster reloads and improved control when moving around obstacles or between shooting positions.
The color-coded packet system makes it straightforward to follow the right assembly sequence. CMMG provides an interactive install walkthrough video and detailed instructions to help you. Basic tool knowledge and care are all you need, though taking your time with small springs and pins prevents frustration.
Yes, after assembly you can replace individual parts like the trigger, pistol grip, or safety selector with aftermarket options of your choice. The entire kit is built on mil-spec standards, so upgraded components from other manufacturers will work with your build.
The extended bolt catch gives you a larger lever to manipulate when locking the bolt back or releasing it during reloads. The extended magazine release button makes dropping magazines faster and easier, particularly useful during high-volume shooting or tactical training.
| UPC | 810097502307 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 55CA642 |
| Model | |
| Color | Black |
| Product Type | Lower Parts Kit |
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