Dirty Bird AR-15 MCF Enhanced Complete Lower Receiver - Black - B5 Furniture - D243

We built the Dirty Bird MCF Complete Lower to be the best AR-15 complete lower for the money.

Why trust Dirty Bird Quality components sourced from tier 1 manufacturers. Assembled by competent professionals who take pride in their work.

Quality Materials, Durable Finish

• 7075-T6 Forgings
• Precision machined on state of the art CNC equipment with quality and tolerance checks throughout the machining process
• Matte black Mil 8625 Type 3 Class 2 hard-coat anodizing

Maximum Compatibility

• “Multi-Cal” markings for compatibility with many different caliber uppers
• Machined to Mil-Spec dimensions
• Compatible with all standard AR-15 components and magazines

Premium Parts Kit Installed

• Mil-spec Lower Parts Kit w/ machined components (not MIM)
• Dirty Bird Ambidextrous Safety Selector
• Enhanced Fire Control Group (FCG) w/ flat trigger & honed sear engagement surfaces for a smooth pull and clean break
• Enhanced polymer trigger guard
• Dirty Bird True Mil-Spec Carbine Buffer Kit
  • 7075-T6 receiver extension (featuring an impossibly smooth ID that minimizes the spring noise)
  • H2 carbine recoil buffer w/ steel counter weights
  • Sprinco “Blue” buffer spring
  • Mil-spec castle nut & end plate
• B5 Systems P-23 pistol grip
• B5 Systems BRAVO mil-spec stock

American Made

Dirty Bird Industries’ Limited Lifetime Warranty