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Product Recommendations

The ultimate stop for AR-15 Rifles and AR-15 parts

We are one of the largest online sources for quality AR-10 and AR-15 rifles, parts and accessories. Shop our selection of complete and stripped Uppers and Lowers, find Barrels and Ammo for your firearms, gear yourself up with quality Gear and Apparel. We have it all!

Rainier Arms was started by enthusiasts for enthusiasts. We specialize in high-end AR-15/M16 rifles, parts and accessories. If we won't use it, we won't sell it.

We offer a wide variety of firearms and firearm parts from all your favorite manufacturers. Satisfy your needs from brands such as Glock, SIG, S&W, Primary Arms, Stag Arms, PWS, Rainier Arms and many others. Browse all manufacturers.

Great store for high-end firearms. Very very knowledgeable staff.
Rainier Arms is my go to dealer for high-end AR15 parts and accessories online. They always have a great selection of parts in stock. Many you can't find anywhere else.
Great shop with easy order pick up for locals making online purchases.

Latest Blog Posts

  • SIG P365 X Macro Custom: Danger Close Armament Style

    Concealed carry isn't just about a firearm; it's about finding a reliable firearm that fits your style and, most importantly, works when you need it to. Less pragmatically significant than functionality is the appeal of aesthetics. Do you need a SIG P365 ...

    Posted By: Thomas Phan

    Posted On: April 08 2024

  • FCD: Forward Controls Design

    Forward Controls Design ("Forward Controls" or "FCD") is a firearm accessory and upgrade manufacturer that designs and builds with the mantra of function over form constantly in mind.  ... SIMPLEX SIGILLVM VERI: Simplicity is the Sign of Truth ......

    Posted By: rainierblog

    Posted On: February 14 2024

  • SHOT Show 2024 – Holosun IRIS

    Holosun has announced the IRIS. The IRIS (Integrated Rifle Infrared System) is an ultra-compact, class IIIr visible green aiming device with a coaxially mounted class 2m IR laser and IR illuminator for use with night vision devices. ... Here's what they tell...

    Posted By: News Release

    Posted On: January 20 2024

  • Tech Specs: TMAG 30 AR/M4 GEN M3

    Coming from Magpul in Spring 2024 is the TMAG 30. A translucent magazine to easily see round type and count. Learn more about the magazine in their press release. ... From Magpul: A second void we found in the magazine market was the concept of a transluce...

    Posted By: News Release

    Posted On: January 19 2024

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