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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Faxon Firearms Match Series 6.5 Grendel AR-15 Fluted Barrel - 18"4.0 star rating 3 Reviews$303.60Out of stock
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Faxon Firearms Stainless Match Series 6.5 Grendel AR-15 Barrel - 18"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30641 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 rating07/07/25TTony 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 SafetyRRicky B.Verified Reviewer5.0 star rating07/06/25Great barrel at a great price!Review by Ricky B. on 6 Jul 2025 review stating Great barrel at a great price!Don't be nervous to pull the trigger on this barrel. I've got over 1000 rounds of ammo through my 18" ultramatch fluted. It prints sub 1" MOA groups consistently when fed with at least 62gr NATO. With 77gr (particularly 77gr SMK bullets) you can get closer to sub . 5" MOA. Barrel is about as light as a rifle length barrel gets while retaining this type of rigidity and resonance period (yes including proof research / other boutique barrels. I noticed that cold bore shots vs a warm gun had a smaller deviation than that of other 16" / 18" barrels that I have shot with. Bottom line, if you're building an accurized ar15, this will meet or beat your expectations.On Rainier Arms Ultramatch MOD2 .223 Wylde AR-15 Barrel - 18" PolishedMMike p.Verified Buyer5.0 star rating07/06/25Looks good works wellReview by Mike p. on 6 Jul 2025 review stating Looks good works wellSeems to help with rise and recoil. Shoots much better than with just a flash supressor. Wish it had threads for a can on the outside, but two out of three ain't bad. Also priced well.On Rainier Arms Xtreme Tactical Compensator (XTC) 2.0 .308/7.62 Muzzle Device - Black NitrideJJames C.Verified Buyer5.0 star rating07/05/25Rainier Arms is Number 1Review by James C. on 5 Jul 2025 review stating Rainier Arms is Number 1Great Product. Great Service and fast shipping at a great price.On KNS Precision .154 Non-Rotate Trigger / Hammer Pin MOD ST$234.60Out of stock -
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