Radian Weapons Model 1 Builder Kit 5.56 17" Billet Upper and AX556 Lower Set Black

The Radian Weapons Model 1 Builder Kit is a bundled set for building an AR-15 platform rifle, combining a billet aluminum upper receiver with a Radian AX556 lower receiver. The kit is intended as a foundation for a custom build suited to a range of shooting uses.

The upper receiver is machined from billet aluminum, has a 17-inch barrel length, and is finished in black. The AX556 lower features ambidextrous controls for left- and right-handed operation. The kit includes the Raptor SD ambidextrous charging handle. The set is listed at a total shipping weight of 5.7 pounds and is compatible with the AR-15 platform in 223 Remington and 5.56x45mm NATO.

• Type: Upper and lower receiver set
• Platform: AR-15
• Calibers: 223 Remington, 5.56x45mm NATO
• Upper Material: Billet aluminum
• Barrel Length: 17 inches
• Finish: Black
• Controls: Ambidextrous (AX556 lower, Raptor SD charging handle)
• Weight: 5.7 lbs