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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

  • P320 California: Good to Go on the Roster

    Sig Sauer has given the welcome news that the so-called "P320 California", i.e. a California-compliant SIG P320 pistol, is now available in the 31st state. ...     ... The State of California is well-known for its anti-gun laws, ceaseless anti...

    Posted By: rainierblog

    Posted On: September 07 2023

  • Best Should Holster (By Function) 2023

    There’s a lot of back and forth about which kind of shoulder holster is the best, but the truth is, the best shoulder holster is the one that fits you the best. Finding that one holster might be tough because of clashing opinions, so I decided to make a comp...

    Posted By: Dave Chesson

    Posted On: September 05 2023

  • AR15 Magazines Guide and Best Picks

    Most people overlook mags when building AR15 rifles. However, quality mag is equally important as all other parts. Why? Because the magazine is the same as a gas tank in your car. You need mag to feed ammo to the chamber and shoot rounds. Anyway, let’s exp...

    Posted By: rainierblog

    Posted On: August 16 2023

  • Stealth Mode: Best AR15 Suppressors

    Suppressors gained a lot of popularity in recent years. Because of this, you can now explore a vast number of different suppressors out there and find which one fits your needs best. Of course, there are still some regulations regarding suppressors, and for s...

    Posted By: rainierblog

    Posted On: August 10 2023

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