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 .223 Wylde AR-15 Flame Barrel - 20"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30614 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 rating06/21/25DDavid B.Verified Buyer5.0 star rating06/20/25❤️Rainier Arms Rock !Review by David B. on 20 Jun 2025 review stating ❤️Rainier Arms Rock !Waiting list paid off ! Most other vendors would have put it on the auction site for twice as muchOn Knight's Armament Company (KAC) Barrel Extension Action WrenchBBrandon B.Verified Buyer5.0 star rating06/19/25It’s a very cool, andReview by Brandon B. on 19 Jun 2025 review stating It’s a very cool, andIt’s a very cool, and effective charging handle. It feels great and works greatOn Rainier Industries Avalanche AR-15 Ambidextrous Charging HandleRRyan O.Verified Buyer2.0 star rating06/17/25Not worth the money or the shipping fees to return kit.Review by Ryan O. on 17 Jun 2025 review stating Not worth the money or the shipping fees to return kit.After installing shifter kit, the paddle is very loose and I am NOT confident that the paddle will remain in place on the flashlight. Also, as is misleading in which side of the flashlight it goes on. I ordered the left side thinking it is for the left side of the flashlight when it is on the pistol in my hand. Apparently it is for the left side of the light when you are looking at the lense of the flashlight. Again, VERY misleading.On Emissary Development Paddle Shifter Kit for SureFire X300 - LeftSSebastian5.0 star rating06/17/25Thanks RainierArmsReview by Sebastian on 17 Jun 2025 review stating Thanks RainierArmsI was having trouble ordering this barrel with other companies quickly as I needed a replacement ASAP. Rainierarms was able to get me this barrel THE NEXT DAY!! Thank you guys so much!!! Will be shopping here for future piecesOn True Precision P365-FUSE 9mm Threaded Barrel 4.3"JJordan H.Verified Buyer5.0 star rating06/17/25Cut & thread/upper disassemblyReview by Jordan H. on 17 Jun 2025 review stating Cut & thread/upper disassemblyRainier did great work disassembling my pinned upper. They also cut and thread the barrel to move to a new pistol build and everything went great with quality workmanship. I would have them do any future needed gunsmithing.On Cut & Threading$303.60Out of stock -
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- Thread Pitch 1/2x28 (.22 cal) Remove This Item
- Platform AR-15 Remove This Item
- Caliber .223 Wylde Remove This Item
- Finish Nitride Remove This Item
- Barrel Length 20" Remove This Item
- Price $300.00 - $309.99 Remove This Item
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