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The MEGA GTR-3H Ambidextrous Billet Receiver Set was designed to complement the enhanced features of the MEGA rifle product line while retaining compatibility with most mil-spec accessories to give you the most options for completing your build. All receivers are precision-machined from solid billet aluminum and are held to extremely tight tolerances and high quality standards to ensure consistent fit and function. With its ambidextrous features, light weight, and superior finish, the MEGA Billet Receiver Set is the perfect foundation for any rifle build.

  • Machined from American Made 7075-T651 billet aluminum
  • True Black Class 2 Type 3 Hard coat anodize
  • M4 feed ramps cut standard
  • Integrated and enlarged trigger guard
  • Generous flare-cut magazine well to facilitate quick magazine insertion
  • Ambidextrous bolt release
  • Threaded bolt catch for ease of assembly and disassembly compared to traditional roll pins
  • Compatible with the Wedge Lock hand guard integral anti-rotation pin for consistent alignment of the top rail (sold separately)
  • All proprietary components are included

Additional information

Weight 16 oz
Dimensions 10 × 6 × 4 in
Thread Pitch



  1. Zoltan Laszlo (verified owner)

    A beautiful study in the art of billet AR15 receiver. Besides the lovely machining, and legacy MEGA rollmarks, it has arguably the better ambidextrous bolt release configuration (right-side button as opposed to ping pong paddle ala DD/KAC or toggle level ala ADM), and it has an unfenced left-side to work with just about any ambidextrous magazine release, like the wonderful FCD ambi releases. This is not always the case, as with the fencing on the ADM lowers and the less than positive release on the Radian lowers (both of which I have more than one of, so it’s a design thing as opposed to individual units being flawed). Also, at the time of my purchase, this was exceedingly affordable. It is not quite so low in price now, but this is still a unique and wonderful receiver set that should be of interest to any well-appointed library of AR15’s in the collection of any connoisseur.

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