SlyBry88

Do 28" Vent Barrels exist for M4s? I've tried googling for one with no luck. I am unsure if I'll be able to use my M4 as a Trap & Skeet firearm. I am willing to buy another benelli for that type of sport but I first want to see if anyone knows of a manufacturer or a 28" barrel for the M4. Thank you -Bryan