Ready to build out a lower, but wanting to minimize spare parts that might tempt you into yet another build? The Aero Precision M4E1 lower parts kit for builders is just what you're looking for. This MIL-SPEC parts kit contains all of the small parts you need to build an M4E1 lower receiver but drops the parts you were going to toss in your parts bin anyway in favor of aftermarket upgrades. The remaining components are built to proper MIL-SPEC quality for maximum reliability and compatibility.
This kit does not include a fire control group, allowing you to build out the rifle you want with the bare minimum of leftovers.
Kit includes:

• Magpul MOE Grip in Black
• Takedown Pin
• Pivot Pin
• Takedown/Pivot Detent
• Takedown/Pivot Spring
• Bolt Catch
• Bolt Catch Buffer
• Bolt Catch Roll Pin
• Bolt Catch Spring
• Magazine Catch Body
• Magazine Catch Button
• Magazine Catch Spring
• Buffer Retainer
• Buffer Retainer Spring
• Safety Selector
• Safety Selector Spring
• Safety Selector Detent
• 4-40 Set Screw (for threaded takedown pin detent hole)