Lower:

The SilencerCo AR-15 Lower Receiver is made from billet 7075-T6 aluminum, it is precision machined for compatibility with all of your preferred parts. The lower receiver is finished in a type III hardcoat anodize for added durability and corrosion resistance. The new design includes a proprietary ambidextrous bolt catch, integrated enlarged trigger guard, and ambidextrous multi-position sling swivels as well as various other features. With the SilencerCo Billet AR-15 receiver, you get the materials, finish, and features you want and need to complete your dream AR-15 build.

• Integral ambidextrous anti-rotation QD sling cups at rear of
  receiver
• Proprietary ambidextrous bolt catch/release (included)
• Enlarged integral trigger guard
• Flared magazine well
• Designed for use with standard mil spec lower parts kit and
  buffer assembly.
• 45 to 90 degree fire selector window for short throw fire
  selectors.
• Rear tensioner bolt hole (bolt not included).
• Machined in-house by SilencerCo out of 7075 Billet Aluminum

Upper:

SilencerCo's AR-15 upper receiver is made from billet 7075-T6 aluminum, it is precision machined for compatibility with all of your preferred parts. With the SilencerCo billet AR-15 upper receiver, you get the materials, finish, and features you want and need to complete your dream AR-15 build.

• Stripped upper receiver
• 7075-t6 aluminum
• Anodized black

CMMG Ambi Mag Release: 

Forever the AR15 has been a right handed person's tool. With Ambi controls evolving, it's becoming more of a tool that everyone can use, even left handed shooters! This Ambi Mag Catch works in place of a standard mag catch to allow left handed shooters drop their mag without having to switch to your right hand for the mag release. Easy drop in replacement, and blends in to the style of any AR.

• Compatible with all AR15/M16 rifles
• Installs the same as factory mag catch
• Includes mag release button and spring