Noveske AR-10 A2 Flash Hider w/5/8x24 Crush Washer 0. The flash hider utilizes a locking collar that secures using an octagonal body. The collar which is twisted around the circumference of the flash hider when tightened fully compresses and diverts the gasses out and to the sides. This allows the flash hider to perform optimally in even the most adverse weather conditions. This also allows the wearer to position the flash hider to absorb damaging or corrosive elements and continue with a reliable shot. Specifications for Noveske AR-10 A2 Flash Hider: Manufacturer: Noveske Threads per Inch: 5/8x24 Gun Model: AR-10 Included Accessories: 5/8 in Crush Washer Package Contents: Noveske AR-10 A2 Flash Hider What firearm models does the manufacturer say Noveske AR-10 A2 Flash Hider is compatible with? The manufacturer says that Noveske AR-10 A2 Flash Hider is compatible with AR-10Noveske 05000502: AR-10 A2 Flash Hider w/5/8x24 Crush Washer