9.5mm hop-up

Printing takes nearly 2 hours because the layer height is set low, making it a bit more time-consuming. It's adjustable, and two lengths were designed, both with a 9.5mm inner diameter: one is 12mm, suitable for the extension length of a standard launcher's inner barrel, and the other is 7mm, suitable for the original plastic barrel of the Shengye MP5K (which extends out only a little over 7mm). You can add an M3 grub screw for adjustment. Both have been tested and can effectively improve accuracy, but there's still a bit of a gap compared to professional ones like Fenghai. Don't expect too much! However! It's sufficient! The important thing is the low cost!