PDI STAINLESS 6.01 inner Barrel 118mm- 5.1 capa/AAP01/G34 Long slide
The best barrels you can get for your Capa.
Nice bump in FPS as well as an increase in consistency and accuracy.
Make sure when you're using one of these you use high quality BBs
These barrels will stick out the end of your outer barrel (5.1/4.3 capa), best adding a Thread adapter to hide majority of it and to allow it to still work with a tracer unit on.