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 RUC PRO MK1 5.56 NATO Partial Upper Receiver5.0 star rating 1 Review$550.00 - $625.00
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Rainier Arms Mountain MOD3 5.56 NATO AR-15 Barrel - 12.5"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30644 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 rating07/09/25BBeau W.Verified Buyer5.0 star rating07/09/25A Functional Flash SuppressorReview by Beau W. on 9 Jul 2025 review stating A Functional Flash SuppressorYou can't even see a flash from the shooter's perspective firing at dusk through a . 357 lever gun. , and it's a rosebud to anyone else. I like it a lot.On Next Level Armament 9mm Hi-Helix Flash HiderJJason Y.Verified Reviewer5.0 star rating07/08/2518" mod 2 223 wylde ultramatchReview by Jason Y. on 8 Jul 2025 review stating 18" mod 2 223 wylde ultramatchOkay so barrel is broken in. This barrel is unbelievably accurate. Printed groups at 100,300,500 today and the verdict is in. WOW! 100 yards 3 shot measured 3/8", 300 yard 3 shot 7/8" and 500 yard measured under 2". Absolutely incredible. More accurate that most big bolt guns.On Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 18" NitrideRRaulVerified Buyer5.0 star rating07/08/25RAINIER ARMS AR-15 FORGED LOWER RECEIVERReview by Raul on 8 Jul 2025 review stating RAINIER ARMS AR-15 FORGED LOWER RECEIVERRAINIER ARMS AR-15 FORGED LOWER RECEIVER - hands down one of the tightest fitting receiver when paired with Rainier Arms forged upper receiver! I had to use a mallet to take it apart! Anodizing was perfect with deep black finish! Would definitely recommend!On Rainier Arms AR-15 Forged Lower ReceiverTTony P.Verified Buyer5.0 star rating07/07/25Nomad Frames Rock. . !!Review by Tony P. on 7 Jul 2025 review stating Nomad Frames Rock. . !!Nomad Frames Rock. . !!On Nomad 9F Enhanced Frame For Glock 17 Gen 5DDan B.2.0 star rating07/07/25Good idea, bad partsReview by Dan B. on 7 Jul 2025 review stating Good idea, bad partsIt worked as advertised for a little bit. After about 200 rounds the reset piece snapped. $200 gone.On Atrius Development 3 Position Super Selektor Safety$195.00 -
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- Gas Block Diameter .750" Remove This Item
- Thread Pitch 1/2x28 (.22 cal) Remove This Item
- Platform AR-15 Remove This Item
- Barrel Length 12.5" Remove This Item
- Gas System Mid Remove This Item
- Manufacturer Rainier Arms, LLC Remove This Item
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