Rainier Arms Manufacturing, LLC is releasing a Billet Upper in the next 30-60 days. Pricing is undetermined at this time but should be in line with other billet offerings in 7075 around $225-250 Retail.

CNC Machined from solid Billet 7075 Aluminum. If you want to build a high end UltraMatch Upper, look no further than the Rainier Arms UltraMatch Billet Upper. We will offer these in A3 & A4 configuration.


The most critical features are:

-Parallelism between the picatinny rail, main center bore and the centerline of the mounting lugs
-Perpendicularity between the centerline of the lugs and the barrel mating face (at the front of the threads)
-Flatness of the barrel mating face

We are holding .0003 or better on all of those measurements. Competitor uppers are between .001 and .003 on the perpendicularity and parallelism.