Yes I had one threaded on by Ellwood Epps when first ordering my JR 9mm Carbine, as I knew the slim somewhat long barrel needed a little something to give it that look I was after, they threaded on a flash hider I had not seen in advance and in the end I swapped it out for a slightly different model, however there was no issue due to enough meat on the 9mm barrel of my factory JR Carbine rifle, and with the new flash hider being the type were the bottom is solid, should mean that the Zombies will never see the dust up from firing in a low (to dirt) level position, which is exactly what I was going for, well that and it looks so much cooler, (makes the barrel look shorter/tougher) & (sorry no photo available yet), besides when you pay good money for a new firearm you might as well build it exactly how YOU WANT IT, not how others want it!