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

We are one of the largest sources for quality AR-10 and AR-15 rifles, parts and accessories online. Shop our selection of complete and stripped Uppers and Lowers, find Barrels and Ammo for your firearms.

Rainier Arms was started by enthusiasts for enthusiasts. We specialize in high end AR15s/M16s, high-end parts & accessories. If we won't use it, we won't sell it.

We offer a variety of firearms and firearm parts from your favorite manufacturers. Fill your needs from brands such as Glock, SIG, S&W, Primary Arms, Stag Arms, PWS, Rainier Arms... 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.„

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Latest Blog Posts

  • Your AR Deserves this BCG – Lantac® Enhanced Bolt Carrier Group

    The bolt carrier group (BCG) is the beating heart of an AR. Like our own heart, it is not only critical to making things function, but it is also put under significant stress to accomplish that. Sure there are many parts of an AR that are critical, most of the...

    Posted By: Riley M

    Posted On: December 13, 2018

  • The Great Light Hype

    Or Is It?   With the ever-growing segment of custom precision bolt guns the last five or so years, we’ve seen a huge growth in the category of lightweight or “backcountry” rifles. As a hunter that makes the attempt to reach difficult areas away from...

    Posted By: Shaun Cook

    Posted On: November 5, 2018

  • Angle of Attack: The Blitzkrieg Components AR-15 Chevron Front Sight Post

    I first came across the Blitzkrieg Components AR-15 Chevron Front Sight Post in the same place I think many of us do when discovering new and interesting products for shooting – Facebook. Up popped an image in my feed with a close-up shot of a front sight po...

    Posted By: Riley M

    Posted On: October 26, 2018

  • The LuthAR MBA 3 Stock review

    The LuthAR MBA – 3 is a very interesting stock, it is not a traditional stock that most would put on the traditional AR platform. When it comes to carbine buffer tubes, most people start looking at the traditional Magpul stocks, Mission First Tactical and ma...

    Posted By: rainierblog

    Posted On: May 28, 2018