Firearms
Rainier Arms provide a large choice of rifles, shotguns, handguns, Bolt Action, AK rifles, and AR pistols. Find, compare, and shop your favorite. In our offer, you can find firearms from manufacturers like Daniel Defense, Kalashnikov USA, Nighthawk Custom, and many many more. In case you run out of ammo, you can browse and purchase ammo for your firearm.

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Radical Defense MK1 MOD1 CQC 556 NATO SBR - 12.5"★ ReviewsPopup content startsclose Popup
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from real shoppers4.8 star rating 30486 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 rating04/23/25JJustin 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 SIGHTCCarlos N.Verified Buyer5.0 star rating04/22/25Excellent much needed addition to the Sig P365 family of firearmsReview by Carlos N. on 22 Apr 2025 review stating Excellent much needed addition to the Sig P365 family of firearmsExcellent aluminum frame for my Sig P365 X. I am still in the process of building my all metal carry concealed firearm, but this was basic, providing with an excellent quality and functional part really needed. Kudos to Icarus!!!!On Icarus Precision A.C.E. 365 XL Hybrid Aluminum Grip Module - BlackBBrantley D.Verified Buyer5.0 star rating04/22/25Delta RailReview by Brantley D. on 22 Apr 2025 review stating Delta RailDespite Troy’s history of poor hiring choices, their Delta rail is still (IMO) one of the best upgrades ever made for the standard issue M4. Installation was easy with no permanent modifications necessary. The handguard is solid and has no play at all. I thought these had been discontinued, but somehow Rainier Arms found a couple. Great job on stocking and shipping!On Troy Industries Battle Rail Drop-In Delta Handguard - Carbine Gas LengthGGerard S.Verified Buyer5.0 star rating04/22/25Great Mag. ReleaseReview by Gerard S. on 22 Apr 2025 review stating Great Mag. ReleaseA great looking ambi mag releaseOn Rainier Arms MARS Ambi Glock Mag Release: Gen 4 & 5TTimothy W.Verified Buyer5.0 star rating04/22/25Scalarworks Peak Iron SightsReview by Timothy W. on 22 Apr 2025 review stating Scalarworks Peak Iron SightsThese Sights are incredible and I highly Recommend Them!!!On Scalarworks PEAK Fixed Iron Sight - Rear$1,299.00Out of stock -
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- Gas Block Diameter .750" Remove This Item
- Threaded Yes Remove This Item
- Thread Pitch 1/2x28 (.22 cal) Remove This Item
- Caliber 5.56 NATO Remove This Item
- Barrel Length 12.5" Remove This Item
- Gas System Carbine Remove This Item
- Twist Rate 1:7 Remove This Item
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