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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
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![Rainier Arms 20th Anniversary Sale — Huge Savings All Week Long!]()
Rainier Arms 20th Anniversary Sale — Huge Savings All Week Long!Rainier Arms is celebrating 20 years of innovation and community, and we’re kicking it off with an epic anniversary sale! From Monday 8/25 at 12:00 AM through Sunday 8/31 at 11:59 PM, enjoy massive discounts sitewide and unbeatable deals on your favorite cat...
Posted By: Thomas Phan
Posted On: August 25 2025
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![Rainier Arms RUC Review: Performance and Reliability]()
Rainier Arms RUC Review: Performance and ReliabilityIn today’s dynamic firearms market, shooters are spoilt for choice when it comes to modern sporting rifles. However, few models manage to strike a balance between precision craftsmanship, tactical reliability, and everyday usability the way the Rainier A...
Posted By: rainierblog
Posted On: August 23 2025
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![Comparing Top AR-15 Optics: EOTech vs Aimpoint]()
Comparing Top AR-15 Optics: EOTech vs AimpointWhen it comes to the best AR-15 optics, two names frequently rise to the top: EOTech and Aimpoint. Both brands have carved out reputations for reliability, clarity, and combat-proven performance. But which one truly stands out in the world of AR-15 red dot sig...
Posted By: rainierblog
Posted On: August 23 2025
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Customizing the P365 for the ultimate Every Day Carry Weapon.
By James Hwang, Rainier Arms Auburn My son has been around guns his whole childhood. As a father, I taught him about gun safety and boundaries while he was growing up, but he never actually went shooting; he just didn’t want to. When he turned 2...
Posted By: James Hwang
Posted On: August 22 2025
