HS-Armory 300mm R-hop Clandestine Enhanced Cut 6.02mm Barrel

At the risk of giving away an incredible advantage, these barrels are extending my accuracy out by roughly 50 feet (probably a bit more), compared to a madbull or other aftermarket barrel. The extended cut is a big deal. Over other r-hopped barrels of excellent craftsmanship, this barrel likely extends accuracy by 20 plus feet. I'm talking about older HS5 barrels I purchased before these.

One warning, be prepared to try multiple different hop-up units. I have gone through four different brands before finding a good fit on a particular gun. Every gun needs tweaking to get a great fit. I have used VFC, Pro win, Lonex, Krytac and G&P. Sometimes the gun jams, low fps, horrible accuracy.