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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Boss Barrels Carbon Fiber 9mm AR-15 Barrel - 8.3"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30669 Reviews- Site Reviews
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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 rating07/23/25PPeter C.Verified Buyer4.0 star rating07/22/25DPM system for G20Review by Peter C. on 22 Jul 2025 review stating DPM system for G20The system translates the sharp recoil to something akin to a 45: a softer push. I like it. So far, functionality is flawless.On DPM Systems Technologies Mechanical Recoil Reduction System For Glock 20 & 21 Gen 5JJr5.0 star rating07/22/25AwesomeReview by Jr on 22 Jul 2025 review stating AwesomeResearched suppressors before purchasing the Maxim defense for my 7. 62 pistol. This is made for a pdx with a 10. 5” barrel or less. It is whisper quiet. Great price. Rainier is great team to work with. Will purchase from them again.On Maxim Defense DSX-D 7.62 SuppressorJJoe C.Verified Buyer5.0 star rating07/21/25Amazing pistol. Great trigger, veryReview by Joe C. on 21 Jul 2025 review stating Amazing pistol. Great trigger, veryAmazing pistol. Great trigger, very flat shooting. Almost feels like cheating.On Bul Armory 1911 Tac Pro Optic Ready 9MM Pistol - 5" SilverJJay5.0 star rating07/20/25What else can you ask for?Review by Jay on 20 Jul 2025 review stating What else can you ask for?KAC is this the only brand I trust for vertical forward grips. I've dealt with Rainier arms several times now and I am not disappointed with them. I'm actually very impressed with how fast they ship and how communicative they are.On Knight's Armament Company (KAC) MIL-STD-1913 Vertical Grip - BlackBBrent W.Verified Buyer5.0 star rating07/18/25Great Hand Stop!Review by Brent W. on 18 Jul 2025 review stating Great Hand Stop!Great Hand Stop!On Drew Meyer Defense Mod 2 Chopstop M-LOK Handstop$450.00 -
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- Thread Pitch 1/2x28 (9mm) Remove This Item
- Barrel Length 8.3" Remove This Item
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