For shooters building a dedicated rimfire AR platform, the right upper receiver determines capability more than any single accessory. A precision-focused 17 HMR upper blends low recoil, cost-effective shooting, and AR ergonomics to deliver a versatile package for varmint work, training, and backyard precision practice.
ALEXANDER ARMS UST17 UPPER RECEIVER
Design and key specifications
The ALEXANDER ARMS UST17 UPPER RECEIVER is built around an 18″ barrel with a 1:9 twist rate optimized for 17 HMR projectiles. Threading is 1/2-28RH to accept common rimfire muzzle devices and the package ships with an A2 flash hider. Its blowback operating system is tuned specifically for the 17 HMR platform, keeping cycling reliable while preserving simple maintenance. The upper weighs 4.5 pounds in black finish, with optional Cerakote upgrades available for users wanting enhanced corrosion resistance or custom aesthetics.
Shop this product to view images, specs, and current pricing directly on our product page. The listed price is $989.99 and that includes two 10-round magazines and a parts kit to convert a compatible lower — valuable extras that reduce build time and initial cost.
Performance and applications
17 HMR is prized for low recoil, flat trajectories at typical varmint distances, and high accuracy with light, high-velocity bullets. With the UST17’s 1:9 twist and 18″ tube, shooters get stable bullet stabilization across the common weight range for 17 HMR projectiles. The blowback action simplifies reliability for rimfire loads, and the included magazines make the upper a ready-to-shoot solution once mated to a compatible lower.
Why Alexander Arms?
Alexander Arms is known for focused engineering on rimfire and small-caliber platforms. Choosing this upper means buying design intent — a factory-configured upper that pairs correctly with the cartridge rather than a generic conversion.
For builders and shooters seeking a purpose-built 17 HMR AR upper with accessories included, the ALEXANDER ARMS UST17 UPPER RECEIVER offers a complete, factory-tuned option. Check availability and view product details and pricing on the shop page — purchasing there will direct you to the retailer’s checkout to complete your order.
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People Also Ask
What makes this product stand out from competitors?
This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.
Is this product suitable for beginners?
Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.
What warranty or support is available?
The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.
How does this compare to similar products in its price range?
This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.
What maintenance is required?
Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.
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