AR57

AR57 ULT Upper 5.7x28mm

• AR57 ULT Upper 5.7x28mm
• AR57-ULT16
• UPC 051497297985
• 5.7x28mm
• 16" Complete Upper Receiver
• 16" Steel Barrel
• 1:8.5" Twist
• 1/2x28 Thread
• Alloy Monobloc Receiver
• 3 Slot MLOK on Upper and Lower Rails
• 8620 Alloy Bolt
• 24 9/16 inches Total Length