Rise Armament 18" Assembled AR-15 Upper - 6MM ARC - 18" Stainless Steel Barrel - Rifle-Length - 15.25" Handguard - BCG & Ambi CH - Black
or 4 interest-free payments of $249.75 with 
6 Magazines Per Order: Due to extreme volume, we are limiting sales of magazines to 6 per customer order. This applies to individual and bundled magazines. AT3 reserves the right to cancel any order over the 6 magazine limit.
- Free standard shipping on orders $139+ details
- 90-day no-hassle returns policy
- Backed by the Rise Armament Lifetime Warranty! what it covers
Product description
Rise Armament 6mm ARC Complete Upper: 18″ Stainless with BCG and Ambi Charging Handle
Features
- 18″ 416R stainless steel barrel for accuracy
- 6mm ARC chambering for long-range performance
- 1:7 twist rate stabilizes heavy projectiles
- Rifle-length gas system for smooth cycling
- 5/8×24 threaded muzzle
- 15.25″ free-float M-LOK handguard
- Black nitride bolt carrier group included
- Rise Armament ambidextrous charging handle included
- Forged billet aluminum upper receiver
- Black anodized finish
- Complete and ready to install
The Rise Armament 6mm ARC complete upper solves the long-range AR-15 problem by chambering the ballistically superior 6mm ARC in an 18″ stainless barrel with everything included. This upper works well for precision shooters wanting .308-level performance from an AR-15 lower, hunters needing flat trajectory and energy past 500 yards, and anyone building a dedicated long-range gun without sourcing individual components. The 416R stainless barrel with 1:7 twist stabilizes heavy match bullets while the rifle-length gas keeps recoil soft – bringing complete long-range capability to your AR-15 build with BCG and ambi charging handle ready to go.
Specifications
- Brand: Rise Armament
- Model: 6mm ARC Complete Upper Receiver
- MPN: RA-6ARC-CU-BLK-18
- Platform: AR-15
- Caliber: 6mm ARC
- Barrel Length: 18″
- Barrel Material: 416R Stainless Steel
- Twist Rate: 1:7
- Gas System: Rifle-Length
- Muzzle Threads: 5/8×24 TPI
- Handguard: 15.25″ Free-Float M-LOK
- Upper Receiver: Forged Billet Aluminum
- Finish: Black Anodized
- BCG: Black Nitride (Included)
- Charging Handle: Ambidextrous (Included)
What’s Included
- 1x Complete upper receiver assembly
- 1x Black nitride bolt carrier group
- 1x Rise Armament ambidextrous charging handle
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Questions & Answers
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Warranty & returns
Backed by the Rise Armament Lifetime Warranty!
Rise Armament Lifetime Warranty
- We have no doubt you’ll love our products. We’re so confident that we’ll let you buy—and try—our products with no risk. If you are not 100% satisfied with your purchase, please return the item to the address below for a refund or replacement within 30 days. That’s right. You can buy a gun or accessory, shoot it, and return it if you aren’t completely satisfied.
- You must include a completed return form with your return. The product must be undamaged and in its original condition. Return it with the receipt in its original, unaltered packaging and with all included material such as manuals, decals, kits, etc.
- You are responsible for packaging the product so it is not damaged during shipping. To help ensure the product is not damaged, we recommend returning it in its original shipping box and packing materials. You may be charged for any damaged or lost items.
- Although you may return fired products, you may not return products that have been altered or modified. RISE Armament is not responsible for lost return shipments.
Manufacturing Guarantee
Our products are backed by a lifetime guarantee. If you have any issues with a RISE Armament product, please email us at racustomerservice@risearmament.com. If there is a manufacturing defect, we will provide a replacement or refund—whichever you prefer.
Disclaimer: Manufacturer’s warranty is subject to change without prior notice.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.
