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 Duty Series 5.56 NATO Gov't/SOCOM AR-15 Barrel - 16"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30702 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 rating08/12/25BBill F.Verified Buyer5.0 star rating08/11/25Tyrant Intellifire TriggerReview by Bill F. on 11 Aug 2025 review stating Tyrant Intellifire TriggerInstalled very easy, the pre-travel is shorter with a nice crisp trigger. I highly recommend this trigger for P365.On Tyrant Designs Intellifire Trigger For Sig P365TThomasVerified Reviewer5.0 star rating08/11/25Very satisfyingReview by Thomas on 11 Aug 2025 review stating Very satisfyingI am very satisfied with my purchase. After doing a ton of research on 6 ARC barrel options I chose ranier based off of their reputation even though there wasn’t a lot of reviews for these barrels. I’ve only taken it out once but it was a very satisfying experience. There wasn’t no break in period or any special instructions the only thing I did was lap the upper. After zeroing the rifle I was hitting sub MOA 5 shot groups with factory ammo. I plan on doing more testing with larger sample sizes but I did take it out to 700 yards easily before running out of ammo. For the price I don’t think you can beat these barrels.On Rainier Arms UltraMatch MOD2 6mm ARC AR-15 Barrel - 18" SatinRRockohaulicVerified Buyer5.0 star rating08/11/25KCI is Top TierReview by Rockohaulic on 11 Aug 2025 review stating KCI is Top TierI have the stock B&T magazine, 2 KCI magazines, and a Baretta magazine for my B&T APC9 Limited. The KCI mags load easier, and feed best.
Simple as that.On KCI USA B&T APC9 / GHM9 Magazine - 30rdTTimothy B.Verified Buyer5.0 star rating08/10/25Great Product Selection, Fast Shipping, and Super Customer ServiceReview by Timothy B. on 10 Aug 2025 review stating Great Product Selection, Fast Shipping, and Super Customer ServiceI is just what I ordered! I appreciate the availability of product, quickness of processing it, and fast shipping. I always appreciate the great customer service.On Huxwrx Flash Hider-QD 762 Suppressor Mount - 5/8x24Aandrew v.Verified Buyer5.0 star rating08/09/25Emissary Development M-LOK Handbrake X - FDE/BlackReview by andrew v. on 9 Aug 2025 review stating Emissary Development M-LOK Handbrake X - FDE/BlackAbsolute Perfection!!👍🏽🇺🇸On Emissary Development M-LOK Handbrake X - FDE/Black (Rainier Arms Exclusive)$161.00 -
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- Gas Block Diameter .750" Remove This Item
- Caliber 5.56 NATO Remove This Item
- Barrel Length 16" Remove This Item
- Gas System Mid Remove This Item
- Manufacturer Faxon Firearms Remove This Item
- Twist Rate 1:8 Remove This Item
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