TNT Studio 6.03mm steel inner barrel + APS-X hop packing for electric gun (170mm)

New hi quality steel tempered inner barrel
made by single metal billet and processed by ultra polished finish
enlarged hop packing hole and various slots for gas/aeg/bolt rifle system
new aerodynamic ejection system with internal front groove design

package includes:
-precision inner barrel
-aps-x hop packing

The New TNT system makes is difference by having in the barrel end a precision groove portion that stabilize the external turboolences, creating just out of the barrel an accurate bb trajectory with longer range and incredible precision.
The new APS-X hop packing with double impact point enhance the hop effect to the max range