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.
-
Faxon Firearms Match Series 6.5 Grendel AR-15 Fluted Barrel - 20"★ ReviewsPopup content startsclose Popup
These are real reviews
from real shoppers4.8 star rating 30633 Reviews- Site Reviews
- Product Reviews
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 rating07/03/25TThinh L.Verified Buyer5.0 star rating07/01/25Sig P320 30rd 9mmReview by Thinh L. on 1 Jul 2025 review stating Sig P320 30rd 9mmGreat 30rd mag, like new function and operation like they should for a lot less.On Sig Sauer P320/P250 9mm Extended Magazine - 30RD (Open Box)WWilliam B.Verified Buyer5.0 star rating07/01/25WWilliam B.Verified Buyer5.0 star rating07/01/25Perfect fitReview by William B. on 1 Jul 2025 review stating Perfect fitFantastic peice of machinery. Never felt more like a cowboy till I slapped this bad Larry on the echyOn Sharps Bros Echelon Improved Grip Module - Black / Brazilian CherryJJason Y.Verified Buyer5.0 star rating07/01/25Superlative arms bleed off gas blockReview by Jason Y. on 1 Jul 2025 review stating Superlative arms bleed off gas blockThe superlative arms gas bleed off block works as advertised. Little strange to have it tuned perfectly when opened to the prescribed starting point of 4 1/2 full turns only to go beyond that to get into the actual bleed off feature. Took a little research into the block to understand what's going on with that aspect of its function. It does however make for a soft shooting gasser in my case. So much so that I'm considering changing out on several of my rifles.On Superlative Arms Adjustable Gas Block Bleed Off (Solid) - MeloniteJJustin i.Verified Buyer5.0 star rating07/01/25LOVE EM'Review by Justin i. on 1 Jul 2025 review stating LOVE EM'I've always wanted one of these and I finally got one. I will get more for my other Glocks.On Taran Tactical Innovations Compact Carry Magwell for Glock Gen 5 - Flat Black$312.80 -
Shop By
Now Shopping by
Shopping Options
- Gas Block Diameter .750" Remove This Item
- Platform AR-15 Remove This Item
- Barrel Length 20" Remove This Item
- Twist Rate 1:8 Remove This Item
My Wish List