So, I just got a brand new 9mm AR pistol. I won't mention the manufacturer (who I've contacted), but it was supposed to be a nice pistol. The pistol came with a 1/2x28 thread 5.56mm A2 flash hider and was factory test fired with it. There's bullet jacket and stuck in the A2. I discovered this after having my cleaning rod abruptly stop at the muzzle. I'm wondering if I would be good to go just changing out the muzzle device or if there might be some damage involved. Anyone's guess?