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ATTENTION: USPS is currently experiencing significantly longer transit times than normal for packages. If your order is time sensitive please choose an Express shipping option at checkout.
Have a peace of mind by getting your A2 Front Sight Gas Block Pinned to your barrel. This ensures the post to securely sit and not move.
PLEASE NOTE: Pending our inspection of the parts, pinning a front sight, gas block, or barrel that was previously pinned may not be possible, and if possible will incur an additional $25 charge.
Review by Velerian H. on 29 Mar 2025review stating Excellent Service
Had a minor hiccup with the service due to an unforeseen issue with the barrel that I initially supplied(totally not their fault). The staff at Rainier was very helpful and responsive in assisting me with dealing with the issue and expediting the service once the proper barrel was received. Everything was put together very well and I was able to c...Read MoreRead more about Had a minor hiccup with the service
omplete my build without any problems. Should I be in the market for another A2 FSB to be pinned, I will definitely be using Rainier. Read LessRead less about Had a minor hiccup with the service
Review by William D. on 21 Oct 2024review stating Flawless
I had my upper Assembly + Accurized by Rainier Arms. I usually build my own but in this instance I was also having a A2 Front Sight post installed on a new barrel in front of a free float hand guard and a flash hider pinned so it just made sense to have Rainier build the entire upper. I don't really trust anyone but myself to work on my firearms b...Read MoreRead more about I had my upper Assembly + Accurized by
ut Rainier did a great job. Not only was it flawless but the turn around time was very fast. I haven't ever have any one else help with one of my builds until now but, If I ever need help again the gunsmiths at Rainier will be the ones to do it! Read LessRead less about I had my upper Assembly + Accurized by
Review by Velerian H. on 29 Mar 2025review stating Excellent Service
Had a minor hiccup with the service due to an unforeseen issue with the barrel that I initially supplied(totally not their fault). The staff at Rainier was very helpful and responsive in assisting me with dealing with the issue and expediting the service once the proper barrel was received. Everything was put together very well and I was able to c...Read MoreRead more about Had a minor hiccup with the service
omplete my build without any problems. Should I be in the market for another A2 FSB to be pinned, I will definitely be using Rainier. Read LessRead less about Had a minor hiccup with the service
Review by William D. on 21 Oct 2024review stating Flawless
I had my upper Assembly + Accurized by Rainier Arms. I usually build my own but in this instance I was also having a A2 Front Sight post installed on a new barrel in front of a free float hand guard and a flash hider pinned so it just made sense to have Rainier build the entire upper. I don't really trust anyone but myself to work on my firearms b...Read MoreRead more about I had my upper Assembly + Accurized by
ut Rainier did a great job. Not only was it flawless but the turn around time was very fast. I haven't ever have any one else help with one of my builds until now but, If I ever need help again the gunsmiths at Rainier will be the ones to do it! Read LessRead less about I had my upper Assembly + Accurized by
