Features:

• 16? Medium Taper
• 1:10 Twist
• 4140 Chrome Moly
• Salt Bath Nitride Finish inside and out
• 9×19 NATO Chamber
• Threaded 1/2-28
• Radial Delayed Blowback Bolt (Patent Pending)
• Requires enlarged ejection port for reliable operation.
• Weight: 2.5lbs