KAK Industry Castle Nut Multi Tool

• 4140 steel hardened coated manganese phosphate .
• Castle nut wrench open styles (works with all styles of tubes)
• 750 flash hider wrench flats
• A2 rifle buffer tube
• 1/2" breaker bar / tension wrench
• 3/16" allen (for grips)
• 3/8" allen (for scope mounts and other accessories)
• Bottle opener