Start your next custom AR build with confidence using the Mercury Precision 80% AR-45 Lower Receiver. Crafted from raw billet aluminum, this Gen II lower is designed for .45 ACP and 10mm builds using Glock-style magazines. It features an enhanced flared magwell for faster, smoother reloads and improved compatibility with a wider range of barrels and bolt configurations.
The threaded bolt catch hole comes prepped with hardware, and the magazine catch assembly and ejector are already installed to save you time. The rear pocket is intentionally left uncut, making this lower fully ATF-compliant and legally considered an unfinished receiver. Whether you're a first-time builder or an experienced enthusiast, the Mercury Precision AR-45 lower offers a reliable, ready-to-finish foundation for your next project.
Type: 80% lower receiver
Caliber Compatibility: .45 ACP & 10mm (Glock-style magazines)
Material: Billet aluminum
Gen II Feature: Enhanced magwell for broader barrel/bolt compatibility
Magwell: Competition-style flared magwell
Bolt Catch: Threaded hole with included hardware
Rear Pocket: Not cut
Included: Installed magazine catch assembly and ejector
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