purchased a combat series upper almost a year ago, most reviews are done within a week or two.
just wanted to post an update on a product that has been in use for over a year.
the upper is still functioning flawless, some might no believe it but i have yet to have a jam after shooting several types of ammo (mostly wolf)
still holds great groups as well, couldnt ask for a better product. Just wanna say thanks for being a top notch company and producing such great parts.
now for the fun part.
with the 37mm I bought at the machine gun shoot
thanks again rainier arms!
bench shooting to check zero, still right on the money