Receiver Set



Receiver Set

We’ve hand-fitted our receiver sets to be the best match possible. That, combined with our Linear Compression Pad, and you’ll have one of the tightest fitting upper and lower combinations available.

Lower Receiver

Mil-Spec dimensions, but so much more. Made from Aerospace Grade Aluminum, our Quantum Mark 2 lower receiver features a flared V-Cut magwell, giving style points while aiding in faster magazine changes. But perhaps the biggest magic is in the Linear Compression Pad slot (pads included). The Linear Compression Pad provides a constant 6 pounds of pressure onto the front of the upper receiver, providing a tight, rattle-free fit to just about any upper you put on it. This method is superior to rear tension screws often found in the high-end receivers. Rear tension can cause premature wear on your extension tube while exacerbating carrier tilt.

Upper Receiver

The upper receiver is machined from Aerospace Grade Aluminum with enhanced walls for greater rigidity and structural integrity – all while keeping a low profile. It features two anti-rotation holes that align precisely with our handguard (not included in this kit). During install, insert the two alignment rods, align our handguard, and tighten. What you’re left with is a monolithic-like style and design with an extremely robust upper/handguard combination. If this is what you’re after, we recommend the upper/handguard kit or full build kit.

The dust cover often goes unnoticed in an AR-15. Not to us. The dust cover is fully contained within the upper receiver. We don’t rely on a C-clip to keep everything in place. Instead, the dust cover hinge pin is held in place by the barrel nut, ensuring nothing comes loose during operation. One thing you’ll notice upon installing the dust cover, it will be tight to close. Due to the variation of dust cover manufacturers and their loose tolerances, we’ve machined a very thin locking groove in the upper receiver. This allows the ball detent of the dust cover to “cut” its own channel in the upper receiver, ensuring a positive, audible lock up and exact alignment.

* Handguards with anti-rotation tabs may not be compatible with billet machined upper receivers, or require hand-fitting.

  • Patented Presslock design and technology
  • Reinforced in critical areas such as the buffer tube and trigger pin joins
  • Flared magazine well
  • Oversized trigger guard
  • Threaded bolt catch roll pin for simple and clean installation
  • Threaded takedown pin detent recess
  • Includes five (5) yellow Linear Compression Pads
  • Pre-installed takedown and pivot pins
  • Pre-installed threaded bolt catch pin
  • Weight: 1.2lbs
Aerospace Grade Aluminum
Black Anodized