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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Stag Arms A2 Pistol Grip★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30615 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 rating06/23/25RRG2Verified Buyer5.0 star rating06/21/25Staccato CS W/PMM CompReview by RG2 on 21 Jun 2025 review stating Staccato CS W/PMM CompSent my CS to Staccato to add a threaded barrel with the intent of adding a comp. Decided on a PMM comp as they had one specifically for the C model. Both the the C and CS are the same at the muzzle but this was listed as not working on a CS due to the shape of the guide rod end as mentioned on another review. As the slide racks the corners of the stock guide rod would make contact with the comp hence not compatible. The DPM System not only fixed this but gave me the opportunity to dial it in. I am very pleased with this set up. It has been great with no issues and is an improvement over stock. The fit and finish are top notch!On DPM Systems Technologies Mechanical Recoil Reduction System - Staccato CS 3.5″ Bull BarrelDDavid 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"$3.50Out of stock -
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