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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

  • Springfield Hellcat: California Legal

    We have a CA handgun roster update for ya: the Springfield Hellcat California. Is the Hellcat California compliant, you ask? The answer is yes, finally, yes it is.    The California Handgun Roster is overseen by the office of the California ...

    Posted By: rainierblog

    Posted On: November 27 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

  • AR15 Ammo Comparison - Complete Guide

    Most of the AR15 rifles on the market come chambered in 5.56 NATO caliber, also used by the military and police. However, despite all those facts, people are still looking for something different out there, which is why you can use so many calibers on your AR...

    Posted By: rainierblog

    Posted On: August 07 2023

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