Fellas I need help gathering some tech info namely the muzzle diameter and barrel taper for the MVP models Varmint Predator Patrol and Scout 16, 18 and 20 inch barrels in 5.56 and 7.62 caliber. If you have a good set of mics or calipers please measure the muzzle diameter (or shoulder diameter aft of the flash hider ) and then the next major diameter back near the barrel nut and then the distance between where the the two measurements were taken. From those three we can also calculate the degree of taper for each barrel type and caliber. The only promise that I'm making right now is that I am still talking to shops about getting some good and rugged wing protected blade iron sights made. They need the data before making estimates.