Rainier Arms UltraMatch Billet AR15 Upper Model AR-15

Description:

CNC Machined from solid Billet 7075 Aluminum and finished with Milspec Anodize. Designed to work with the Magpul BAD lever, Daniel Defense Lite rails and 99% of aftermarket accessories. If you want to build the best upper money can buy, look no further than the Rainier Arms UltraMatch Billet Upper. Extremely robust yet weighs in at a mere 9.3 oz. Made in the USA.

• Limited Life Time Warranty against defects & workmanship
• 90 day - Satisfaction guarantee - 100% money back with no questions asked

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.