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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Noveske Stainless Lo-Pro Gas Block 300BLK AR-15 Barrel - 10.5" w/ HS Bolt★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30490 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 rating04/24/25MMichael A.Verified Buyer4.0 star rating04/24/25Invest in a cantilevered riser.Review by Michael A. on 24 Apr 2025 review stating Invest in a cantilevered riser.Invest in a cantilevered riser.On Vortex Spitfire HD Gen II Prism Scope - 3xJJose P.Verified Buyer5.0 star rating04/23/25Fits perfectly on my Sig P365XReview by Jose P. on 23 Apr 2025 review stating Fits perfectly on my Sig P365XThis grip module is amazing, the look the feel are awesome.On Tyrant Designs P365 Snub Nose Grip Module w/ Safety CutoutAAgustin M.Verified Buyer5.0 star rating04/23/25Well made mags!Review by Agustin M. on 23 Apr 2025 review stating Well made mags!My son in law just got his first AR15, so $ has been a factor. I found a great price on these Hera Arms magazines so we went halves, he was so excited when he got them. Thanks Rainier, we will see you again!On Hera Arms H3T Polymer Magazine - 30 Round Black (10 Pack)JJohn M.Verified Buyer5.0 star rating04/23/25Fine fit and finishReview by John M. on 23 Apr 2025 review stating Fine fit and finishInstalled on a PTR 9KT, I had to bend the ejector arm slightly to ensure it would track into the groove of the bolt carrier. Runs great with a Hoffman kit. Installed a Magpul MOE grip, the grip needed some shaving to seat flush. Very happy with this grip housing!On Lee Sporting Aluminum MP5 / SP5 / HK Clone Lower Housing - K Semi-ShelfJJustin T.Verified Buyer4.0 star rating04/23/25HappyReview by Justin T. on 23 Apr 2025 review stating HappyOnly complaint is it showed up with a dead battery. Other than that, it's crisp, easy to pick up, and seems solidly builtOn Atibal SLR-1 SOLAR RED DOT SIGHT$408.50Out of stock -
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- Gas Block Diameter .750" Remove This Item
- Caliber 300 Blackout Remove This Item
- Finish Satin Remove This Item
- Barrel Length 10.5" Remove This Item
- Price $400.00 - $409.99 Remove This Item
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