FS's on the 'Roids
2 A2's and 1 Phantom FS's on the 'roids. These are 1.1" in diameter. The barrel-mounted A2 is on a 440 Corbon barrel with a .920" gas block journal that I turned into a 14 3/4" M4 with a 5/8-24 barrel thread and the other 2 ( for 50AE) have 3/4-24 threads with SS Krush Washers. A standard A2 flash suppressor is shown for scale.