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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Rainier Arms Match .223 Wylde AR-15 Barrel - 8.5"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30700 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 rating08/11/25RRockohaulicVerified 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)JJeffrey R.Verified Buyer5.0 star rating08/09/25A good valueReview by Jeffrey R. on 9 Aug 2025 review stating A good valueLove the handbrake, it allows me to keep my hand in a more neutral and natural manner vs my old one where I had to cantilever my hand . . definitely getting another one in the near future . .On Emissary Development M-LOK Handbrake X - FDE/Black (Rainier Arms Exclusive)AAK B.Verified Reviewer4.0 star rating08/08/25How do I remove it from the mountReview by AK B. on 8 Aug 2025 review stating How do I remove it from the mountSOCOM is notorious for carbon lock at the mount. Using True Blue Suppressor Syrup will stop that from ever happening again!On Surefire SOCOM556 RC2 Sound Suppressor - FDE$260.00Out of stock -
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- Gas Block Diameter .750" Remove This Item
- Thread Pitch 1/2x28 (.22 cal) Remove This Item
- Caliber .223 Wylde Remove This Item
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- Manufacturer Rainier Arms, LLC Remove This Item
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