Anderson Barrels: 16" 5.56 M4 Profile 18" .223 Wylde Spiral-Flute 18" .223 Wylde Straight-Flute 24" .223 Wylde Spiral-Flute 20" .308 for AR-10 Other New Anderson Products: 5.56 Bolt Carrier Group Stainless Buffer Spring Stainless AR-15 Hammer Happy weekend! Zach