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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

  • 2019 Best AR-15 Charging Handles

    When it comes to manipulations of almost all AR15 rifles, aside from the trigger, the most used and manipulated control is the charging handle. It’s what charges and clears the weapon and is directly linked to the BCG (Bolt Carrier Group) and the only way to...

    Posted By: rainierblog

    Posted On: May 8, 2019

  • 2019 Best AR-15 Upper Receivers

    The AR-15 has become one of the most popular firearms among American gun owners and for good reason. Due to its lightweight frame, high level of accuracy and versatility, the weapons system is a testament how innovation can transform an older design. For years...

    Posted By: rainierblog

    Posted On: May 8, 2019

  • 2019 Best AR-15 Bolt Carrier Groups

    There are few parts of an AR that are as important as the bolt carrier group. While the standard Mil-Spec bolt carrier does its job well and has for decades, new improvements in technology and materials have come along and revolutionized the design. When looki...

    Posted By: rainierblog

    Posted On: May 8, 2019

  • 2019 Best AR-15 Muzzle Devices

    Since the AR-15/M16 came out in 1957, it has become the one of the most popular firearms platforms in the world. During the last ten to fifteen years, many companies have been manufacturing aftermarket parts, such as stocks, trigger groups, bolt carriers, fore...

    Posted By: rainierblog

    Posted On: April 26, 2019