With the type 96 replicas the first thing you'll want to replace is the hop up unit and the inner barrel as well. The stock L96 hop up unit and hop up bucking are both pretty lousy.
The best aftermarket upgrade hop up unit and inner barrel are both by PDI, but they are pricey. Expect to pay at least $200USD if you go PDI
PDI Hop up unit:
A more cost effective alternative combo would be an edgi inner barrel and a hexagon products hop up unit.
The alternate combo will run about half the price of the PDI setup. The downside is that you will have lower quality materials and the HP hop up unit will not have the ability to tune left / right hop, so you might have to shim if there is curving.