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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Patriot Ordnance Factory (POF) Roller Cam Pin★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30450 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 rating04/12/25MMichael M.Verified Buyer5.0 star rating04/12/25SlickReview by Michael M. on 12 Apr 2025 review stating SlickLove itOn Rainier Industries Avalanche AR-15 Ambidextrous ANC Charging HandleMMartin W.Verified Buyer5.0 star rating04/11/25Good all around buffer and weightReview by Martin W. on 11 Apr 2025 review stating Good all around buffer and weightThis should be the standard.On Geissele Super 42 Braided Wire Buffer Spring and Buffer - H2MMartin W.Verified Buyer5.0 star rating04/11/25Wow, had Geissele packs prior to thisReview by Martin W. on 11 Apr 2025 review stating Wow, had Geissele packs prior to thisAfter buying a Springfield Waypoint 2020 that comes with a triggertech included. I thought I’d try the triggertech on my newest AR build. It’s phenomenal. And at 4. 5 lbs it feels like much less because all of the slop and take up is eliminated.
Great trigger, very much recommended.On Triggertech Competitive AR Trigger - StainlessAAnderson R.Verified Buyer5.0 star rating04/11/25Don’t think about it. Just buy it.Review by Anderson R. on 11 Apr 2025 review stating Don’t think about it. Just buy it.Fast shipping from Rainier. The price was right. (On Sale) And the gun shoots amazing right out the box.On CZ-USA Shadow 2 Compact 9MM Pistol - 15rdLLouis R.Verified Buyer4.0 star rating04/11/25Very Nice Picatinny Mount StockReview by Louis R. on 11 Apr 2025 review stating Very Nice Picatinny Mount StockI mounted this on a UIC stock with an integral picatinny rail in the rear. It mounted easily, and appears in all facets to be well made and the usual Haga designed excellence. The only reason I gave it a 4 star rating is I would prefer one other bolt or fastener in addition to the picatinny screw to ensure the stock doesn't come loose.On A3 Tactical HDA3 Hybrid Folding Stock Assembly for 1913 Picatinny - BlackOut of stock -
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