Rifle Parts
Whether you're building a new rifle from scratch or looking to upgrade an existing firearm, our vast selection of rifle parts has everything you are going to need in that journey. At Rainier Arms' selection of rifle parts, you can find a wide variety of products including lower and upper parts, trigger parts, muzzle devices, and many more.
Explore our selection of high-quality parts coming from various leading manufacturers like Strike Industries, Magpul, BCM, and many more.
Also, don't forget to check our specially-made Rainier Arms barrels for your firearms.
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Rainier Arms UltraMatch MOD2 6mm ARC AR-15 Barrel - 18" Satin★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30695 Reviews- Site Reviews
- Product Reviews
Thank you for posting a review!We value your input. Share your review so everyone else can enjoy it too.Thank you for posting a review!Your review was sent successfully and is now waiting for our staff to publish it.Verified Reviewer0.0 star rating08/08/25BBobby J.Verified Buyer5.0 star rating08/07/25All Around A+ for Rainer.Review by Bobby J. on 7 Aug 2025 review stating All Around A+ for Rainer.For the money it was a steal. Was very impressed with the speed of shipping. Really like dealing with RA, they have a small company feel, but big business quality.On Icarus Precision AR 9mm Billet Stripped Upper ReceiverSSamuel N.Verified Buyer5.0 star rating08/07/25Guns greatReview by Samuel N. on 7 Aug 2025 review stating Guns greatGuns greatOn F-1 Firearms FDR-15 5.56 Rifle - 16"WWarren W.Verified Buyer1.0 star rating08/06/25Same tension springs in package.Review by Warren W. on 6 Aug 2025 review stating Same tension springs in package.I received two exact same springs tensions from my order from Rainier. I have already reached out to DPM to make it right. They were surprised about how it happened and are looking into it.On DPM Systems Technologies Mechanical Recoil Reduction System - H&K VP-9/SFP-9 & VP-9L/SFP-9LJJohn S.Verified Buyer5.0 star rating08/05/25Devil dog hard chargerReview by John S. on 5 Aug 2025 review stating Devil dog hard chargerLove it, makes it a much better rifleOn Devil Dog Concepts Hard Charger (HC) AR-15 Side Charging Handle - Front MountJJoshuaVerified Buyer5.0 star rating08/05/25It’s toughReview by Joshua on 5 Aug 2025 review stating It’s toughMy buddy at KNS recommended this life saving tool whenever my muzzle device happens to get carbon locked on my suppressorOn Forward Controls Design Joint Muzzle Device Wrench (JMW)$400.00Out of stock -
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Rainier Arms UltraMatch MOD2 6.5 Grendel AR-15 Barrel - 18" Satin5.0 star rating 1 Review$400.00Out of stock
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- Thread Pitch 5/8x24 (.30 cal) Remove This Item
- Platform AR-15 Remove This Item
- Barrel Length 18" Remove This Item
- Price $400.00 - $499.99 Remove This Item
- Manufacturer Rainier Arms, LLC Remove This Item
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