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Rainier Arms, LLC

Rainier Arms AR-15 UltraMatch Billet Upper & Ambi Lower Combo Set - MOD 3

Rainier Arms AR-15 UltraMatch Billet Upper & Ambi Lower Combo Set - MOD 3

Availability: In stock




Rainier Arms UltraMatch Billet Upper and Lower Combo Set MOD 3

Our billet sets are CNC machined from solid billet 7075-T6 aluminum which is 70% stronger than the commonly used 6061 aluminum and finished with milspec hardcoat anodize to a surface hardness of 60 Rockwell. We have designed our lowers with an ambidextrous magazine release and bolt release with extended latch for smoother deployment. The precision machining on our billets are well known in the industry and we are excited to introduce our combo sets for your next rifle build.


  • Ambidextrous Extended Bolt Release
  • Ambidextrous Magazine Release
  • A4 Feed Ramps
  • 7075 Billet Aluminum
  • Flared Magwell
  • Integrated Trigger Guard
  • QD Socket machined in
  • Tensioning Screw for proper Upper/Lower Fit

FFL Required Before Shipping.

Please have your dealer email their license to or they can also fax it in. Please give us a few days to process the information.

Blog: Rainier Arms UltraMatch Billet Upper and Ambi Lower Mod 3 Set review.

Additional Info

Additional Info

Manufacturer Rainier Arms, LLC
Finish No
Barrel Length No
Caliber No
Configuration No
Option No
Gas Length No
Height No
Rail Length No
Mount No
Profile No
Reticle No
Co Witness No
Size No



Feel free to ask us any question regarding this product.