Rainier barrels are meticulously designed and machined by precision gunsmiths. Our barrels are turned the same way true artisans have made premium rifle barrels for over a century. Each barrel has hand-cut chambers and crowns with the attention to detail that can only come from highly trained human intervention. While most companies strive for faster production time to cut costs, we strive for perfection. There are no shortcuts with our barrels, period.
We will go toe to toe with anyone and win.
Satisfaction Guarantee
We are so confident in our barrels that we offer a 100% money back guarantee within 90 days of purchase. If our barrels don’t meet or exceed your expectations, for any reason, return it for a full refund.
Many have asked us to build a barrel with the same workmanship as our Match barrels while keeping it more affordable. We are able to reach our goal by sourcing a very high end barrel blank at an affordable price. We start off using a high precision match blank in 1:8 twist, use a 5 groove polygonal rifling, machine it to the highest quality and matched with our limited-life time warranty, you have a barrel that is the best value, hands down, in the industry.
Review by James W. on 24 Jan 2021review stating I was happy to succeed
I was happy to succeed in turning this barrel down to something like a pencil-weight, and reducing the gas block section from .750 to .625 to accept the smaller gas block. At such time as I can find a bolt carrier group, I will finish the project.
Review by Brad on 7 Jul 2020review stating Great Shooter
I finally completed my upper with a BCM 13.5 M-LOK FF rail and put rounds through it. I used factory Frontier 55g 5.56 ammo and a Holosun 403R to zero at a modified 36yd 25m target. I had several holes touching at 25m and again at 50m. I shot several rounds at 100m to confirm zero and all were within 2", which with a red dot and decent ammo means ...Read MoreRead more about I finally completed my upper with a
it is probably capable of 1" or less groups at 100m. I shot 6 rounds at the 18" plate at 300m and hit every time. Eventually this upper will have a scope and I will post results. Shooting done off a bench with simple pads to steady the rifle, no bags or rail were used. Read LessRead less about I finally completed my upper with a
Review by James W. on 24 Jan 2021review stating I was happy to succeed
I was happy to succeed in turning this barrel down to something like a pencil-weight, and reducing the gas block section from .750 to .625 to accept the smaller gas block. At such time as I can find a bolt carrier group, I will finish the project.
Review by Brad on 7 Jul 2020review stating Great Shooter
I finally completed my upper with a BCM 13.5 M-LOK FF rail and put rounds through it. I used factory Frontier 55g 5.56 ammo and a Holosun 403R to zero at a modified 36yd 25m target. I had several holes touching at 25m and again at 50m. I shot several rounds at 100m to confirm zero and all were within 2", which with a red dot and decent ammo means ...Read MoreRead more about I finally completed my upper with a
it is probably capable of 1" or less groups at 100m. I shot 6 rounds at the 18" plate at 300m and hit every time. Eventually this upper will have a scope and I will post results. Shooting done off a bench with simple pads to steady the rifle, no bags or rail were used. Read LessRead less about I finally completed my upper with a
