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.
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
Configuration:
A3 Flat-Top
Manufacturer Limited Life Time Warranty against defects & workmanship...plus, 90 day - Satisfaction guarantee - 100% money back with no questions asked.