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Mega Arms AR15 GTR-3S Lower Receiver

Midwest PX Billet AR15 Lower Receiver

Quick Overview

Packed with features but low on price.

Availability: In stock



  • 7075 aluminum for 70% increase in strength compared to 6061
  • Integrated, enhanced trigger guard
  • Matches forged upper receivers
  • Threaded bolt catch (no more marring receivers trying to drive a roll pin!)
  • Threaded takedown channel to allow the spring to be captured so it doesn't fly out when the receiver extension is removed.
  • Tensioning screw with nylon tip to adjust tension between upper and lower
  • Type 3 Class 2 anodized
  • Subdued markings
  • Low shelf, RDIAS-ready

Additional Information

Ambidextrous No
Material 7075
Color Black

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  1. great lower!!! review by clark on 9/12/2016

    Love this lower. assembled an m4 on it, took the slack out of the crappy parts kit i built with. No issues, no fiddling to make stuff work.

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