Maple Leaf Vortex Twisted Outer Barrel (For 510mm Inner Barrel) - VSR-10 Series Cutlery & Dinnerware The Tokyo Marui VSR-10 has

The Tokyo Marui VSR-10 has been considered one of the best

but available here

With length adjustment and MOLLE compatibility

This will allow the user to place the red dot itself on the Full SIze USP meaning you won't have to replace the entire slide for a different set

Maple Leaf Vortex Twisted Outer Barrel (For 510mm Inner Barrel) - VSR-10 Series Cutlery & Dinnerware The Tokyo Marui VSR-10 hasAn outer barrel with a Vortex Twisted design for the Tokyo Marui VSR 10 bolt action rifles. For use with a 510mm inner barrel. This outer barrel is close in length to the original VSR 10 Outer Barrel. Made from CNC Aluminium. Female 28mm CW barrel end thread. Weight: 230g