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 1:7 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.
Specifications
Stainless Steel Blank
Length: 20"
Twist: 1:7
Thread Pitch: 1/2 X 28
.625 Gas Block Seat
5.56 NATO Chamber
5 groove polygonal rifling
Rifle Gas System (Gas Tube not Included)
M4 Feed Ramps
M16A1 Contour
Nitride Finish
Weight: 1 lb 13.9 oz
Our Craftsmanship
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.
Review by Thomas G. on 11 Nov 2024review stating Your customer service rep was
Your customer service rep was very helpful and provided the information that I needed to make an informed choice. The barrel hammers. Thanks Rainer for making a great product at a reasonable price.
Review by Justin on 24 Mar 2024review stating Great purchase
Very pleased with this. I shopped around a lot for a barrel for a M16A1 build and decided to take a chance with this. I haven't installed it yet, but the quality is excellent. I've got some nice barrels and this is among the better ones I've owned. Profile is all correct and the rifling is bright and clean. The only thing I'd note if you're picky ...Read MoreRead more about Very pleased with this. I shopped
is that the RA marking is in a white or grey font on the bottom of the barrel and hard to remove it that's your thing for your clone correct builds. Nothing that can't be touched up. I've been trying to weather mine and the process has been difficult. That speaks to the quality. Read LessRead less about Very pleased with this. I shopped
Review by Nick on 2 Aug 2023review stating Fantastic retro callback
I've been rocking the barrel for my retro build before HB-1240. In every aesthetic it functions and fits the needs you'd hope for out of a 20" barrel while updating the twist rate to use a wider range of ammunition. Took it to a gunsmith and had a new FSB pinned, topped it off with a 3 prong. If you've got one of the H&R receivers, I'd use thi...Read MoreRead more about I've been rocking the barrel for my
s over any others readily available at this time. If you had an interest for putting any retro styled launchers on it, rest assured it meets all the dimensional requirements as long as the FSB is pinned to the correct length. Read LessRead less about I've been rocking the barrel for my
Review by Tim E. on 26 Jun 2023review stating Good Barrel, not M16A1 no front sight pin cuts
The barrel quality looks great. I got it out of the box to start putting it together and oops there are no cuts for the front sight taper pins to be put in. This shouldn't be advertised as M16A1 if you can't mount an M16A1 front sight, I'm very disappointed.
Comments by Store Owner on Review by Tim E. on 26 Jun 2023
Rainier Arms
06/26/23
Hi Tim,
Because the alignment of the taper pins is critical for zeroing and function on barrels with FSBs, we do not pre-drill any of our barrels, and new FSBs also are not pre drilled. This is so that they can be drilled and reamed at the same time to ensure correct alignment.
K
Kim
Verified Buyer
5.0 star rating
12/07/22
Awesome A1 Barrel
Review by Kim on 7 Dec 2022review stating Awesome A1 Barrel
Very fine machining and beautiful finish. Very impressed. Highly recommended.
Q: This barrel has M-4 feed ramps, will it fit my M16A1 upper receiver? Thank you
Rainier Arms
11/13/24
A: It will!
C
Cam
Verified Reviewer
03/10/23
Q: Can you confirm the twist rate please? The M16A1 which is what the barrel is being sold as had a 1:12 twist. Which i would like This item says it has a 1:7 twist. If that is correct that would make this a M16A2 barrel not a M16A1 barrel.
Rainier Arms
03/16/23
A: This barrel is designed to mimic the aesthetic of the M16A1 barrel while providing a better shooting experience, including a modern 1/7 twist to allow the use of heavier ammunition and is nitride instead of chrome lined to improve accuracy.
Review by Thomas G. on 11 Nov 2024review stating Your customer service rep was
Your customer service rep was very helpful and provided the information that I needed to make an informed choice. The barrel hammers. Thanks Rainer for making a great product at a reasonable price.
Review by Justin on 24 Mar 2024review stating Great purchase
Very pleased with this. I shopped around a lot for a barrel for a M16A1 build and decided to take a chance with this. I haven't installed it yet, but the quality is excellent. I've got some nice barrels and this is among the better ones I've owned. Profile is all correct and the rifling is bright and clean. The only thing I'd note if you're picky ...Read MoreRead more about Very pleased with this. I shopped
is that the RA marking is in a white or grey font on the bottom of the barrel and hard to remove it that's your thing for your clone correct builds. Nothing that can't be touched up. I've been trying to weather mine and the process has been difficult. That speaks to the quality. Read LessRead less about Very pleased with this. I shopped
Review by Nick on 2 Aug 2023review stating Fantastic retro callback
I've been rocking the barrel for my retro build before HB-1240. In every aesthetic it functions and fits the needs you'd hope for out of a 20" barrel while updating the twist rate to use a wider range of ammunition. Took it to a gunsmith and had a new FSB pinned, topped it off with a 3 prong. If you've got one of the H&R receivers, I'd use thi...Read MoreRead more about I've been rocking the barrel for my
s over any others readily available at this time. If you had an interest for putting any retro styled launchers on it, rest assured it meets all the dimensional requirements as long as the FSB is pinned to the correct length. Read LessRead less about I've been rocking the barrel for my
Review by Tim E. on 26 Jun 2023review stating Good Barrel, not M16A1 no front sight pin cuts
The barrel quality looks great. I got it out of the box to start putting it together and oops there are no cuts for the front sight taper pins to be put in. This shouldn't be advertised as M16A1 if you can't mount an M16A1 front sight, I'm very disappointed.
Comments by Store Owner on Review by Tim E. on 26 Jun 2023
Rainier Arms
06/26/23
Hi Tim,
Because the alignment of the taper pins is critical for zeroing and function on barrels with FSBs, we do not pre-drill any of our barrels, and new FSBs also are not pre drilled. This is so that they can be drilled and reamed at the same time to ensure correct alignment.
K
Kim
Verified Buyer
5.0 star rating
12/07/22
Awesome A1 Barrel
Review by Kim on 7 Dec 2022review stating Awesome A1 Barrel
Very fine machining and beautiful finish. Very impressed. Highly recommended.
Because the alignment of the taper pins is critical for zeroing and function on barrels with FSBs, we do not pre-drill any of our barrels, and new FSBs also are not pre drilled. This is so that they can be drilled and reamed at the same time to ensure correct alignment.