Quantum Mark 2 lowerQuantum Mark 2 lower

Quantum Mark 2



SKU: 92237 Category: Tag:
Quantum Mark 2

Here is your chance to have a fully complete Blackout Defense lower receiver. Just install your upper and head to the range. It comes complete with our Zero™ single-stage, short reset trigger.

The Quantum Series mil-spec billet lower receiver features our patented Presslock™ design and technology, which guarantees a tight, rattle-free fitment with any mil-spec upper receiver, and also reduces wear by eliminating carrier tilt.   To achieve this, a small linear cavity is precision machined into the front of the receiver just behind the pivot pin, and a replaceable panel of aerospace-grade composite is inserted into the cavity.  This composite sits slightly higher than the top of lower receiver and  consistently applies six pounds of upward pressure onto the front of the the upper receiver.  This causes the front of the upper receiver to lift and the back of the upper receiver to fall, just enough to remove tilt and cause the upper receiver to sit firmly in place.

If you’re looking to start or finish your premium AR-15 build, this is the receiver that belongs in your hands.

The Mark 2 features a “V” cut, increasing the surface area of the magwell.

  • Patented Presslock Technology
  • Reinforced in critical areas such as the buffer tube and trigger pin joints
  • Lifetime of free compression pad replacements
  • Flared magazine well
  • Oversized trigger guard
  • Threaded bolt catch roll pin for simple and clean installation
  • Threaded takedown pin detent recess
  • Made in the USA
  • Ambidextrous rear sling swivel
  • Aftermarket furniture subject to change depending on supply
Billet 7075 aluminum
Hard coat black anodized
Blackout Defense ZERO™ trigger
Magpul MOE+ grip
Buffer spring:
Chrome silicon
PDF Instructions