The American Tactical Milsport Complete Lower Receiver (part no. ATIGLOWMS15) gives builders a ready-to-use foundation from ATI’s value-focused Milsport line. It ships complete rather than stripped, meaning the lower parts kit and furniture are already installed, so it accepts an upper without any additional purchases. The receiver is multi-caliber compatible, working with standard AR-15 pattern uppers regardless of chambering, making it a straightforward option for builders who want to skip the parts shopping list.

Key Specifications

• Part of American Tactical’s Milsport receiver line.
• Ships as a complete lower receiver, ready to attach an upper.
• Multi-caliber compatible with standard AR-15 pattern uppers.
• Machined from 7075-T6 aluminum and finished in black anodized for corrosion resistance.
• Ships as a complete lower with a proprietary magazine catch assembly and ejector installed.
• Weighs approximately 2.4 pounds as shipped, reflecting the fully assembled lower parts kit.
• Fitted with a collapsible stock as part of the complete build.

Frequently Asked Questions

Does this lower ship with parts installed? Yes, it ships complete and is ready to accept an upper.

Does this require an FFL transfer? Yes, as a complete lower receiver it must transfer through your local FFL like any other firearm.

Buy the American Tactical Milsport Complete Lower Receiver

Skip the parts list with a complete American Tactical lower. Browse more AR-15 lower receivers and order from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.