Ruger AR-15 SR-556U Flat-Top Gas Piston Upper Receiver Assembly 6.8mm Remington SPC
- Upper Receiver: AR-15 Flat-Top Gas Piston Upper
- Barrel Length: 16"
- Barrel Contour: M4
- Barrel Material: 41V45 Mil-Spec Chrome Lined, Cold Hammer Forged
- Muzzle Thread Pattern: 5/8"-24
- Chrome Lined: Yes
- Barrel Finish: Matte
- Twist Rate: 1 in 10"
- Chamber: 6.8mm Remington SPC
- Bolt Carrier: Chrome Plated Bolt, One-Piece Bolt Carrier
- M4 Feed Ramps: Yes
- Muzzle Device: A2 Flash Hider
- Gas System Length: Carbine
- Gas Block Diameter: Two-Stage Piston
- Handguard: Quad Rail, Free Float
- Sights: Troy Industries Front and Rear Folding Sight
- Extras: 3 Low Profile Rail Covers, 3 30-Round MagPul Pmag Magazines
- Weight: Not Listed by Manufacturer
Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.
Shipping Weight: 13 PoundsXThe total weight of the product, including the product’s packaging as it sits on our shelf. Since some products ship directly from the Manufacturer, their weight may be unavailable. Because of variations in the manufacturing process, similar products may have differing weights. Unless the product is designated as “Ships Alone”, Shipping Weight does not include the shipping box or packing materials associated with your order.
Ships Alone: YesXProduct ships from MidwayUSA, separate from any other products on your order due to its size. Products that are Shipped Alone incur separate "Per Order" and "Per Pound" shipping charges.
XProduct is regulated by the US Department of Transportation (DOT) and cannot be shipped via USPS or air shipping methods. DOT-Regulated products must ship UPS Ground.
XProduct is restricted by shipping carriers and cannot be shipped to certain locations or via certain shipping methods.
XAdditional shipping charge for HazMat products. Carriers charge extra to ship packages with products they consider hazardous, such as reloading powder and primers.
- DPMS AR-15 AP4 A3 Upper Receiver Assembly 6.8mm Remington SPC... $595.99 Available
- Yankee Hill AR-15 Entry Carbine Upper Receiver Assembly 6.8mm... Add to Cart for Price
- Yankee Hill AR-15 Specter XL Black Diamond Upper Receiver... $713.06 Available
- Yankee Hill AR-15 Smooth Carbine Upper Receiver Assembly 6.8mm... $667.69 Available