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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

  • Build of the Week: SIG SAUER P320 Modular Pistol

    In the world of handguns, the P320 is relatively new on the scene. It was introduced back in 2014 and rose rapidly in the ranks of service weapons. Then, in 2017, it was chosen by the United States Army to replace the M9 cementing its status as a top contende...

    Posted By: rainierblog

    Posted On: November 11, 2019

  • Build of the Week: Meet the Battle Boar

    Our Build of the Week this week went from zero to sixty really fast. We started with one product that we knew we wanted to try out on the range, and it was all downhill from there. The result was a gun that was pleasant to look at and doubly pleasant to shoot...

    Posted By: rainierblog

    Posted On: November 5, 2019

  • Red Dot Sights vs. Magnified Scopes: What's The Best For Your AR-15?

    We all know adding an optic to your AR-15 will enhance your shooting However, which one should you choose A red dot or a scope? You’ll find out by the end of this guide. Let’s dive in! What Is A Red Dot? Simply put: It’s a optic with a red (...

    Posted By: rainierblog

    Posted On: October 29, 2019

  • IWI MASADA REVIEW

    I wanted to jot down a few notes as to our experience with the IWI Masada. A quasi review, but not a full article approach. More down and dirty notes and observations. It didn’t take long as soon as the gun was available that all the top YouTube reviewers ha...

    Posted By: rainierblog

    Posted On: October 17, 2019