This is the stock blaster:
After opening it up, the first mod is to get rid of the AR:
Now, get carve a small hole in the plunger tube cap to fit 17/32" brass inside:
Next, get rid of the piece in the middle of the plunger tube to allow more airflow:
For spring upgrades, the blaster is compatible with Retaliator springs. For the upgrade, I am using a 7kg Retaliator spring:
Make sure you upgrade the catch spring with this spring upgrade.
For the brass barrel, cut the 17/32" brass to 2.5 inches, and epoxy the brass to the muzzle piece and the plunger tube cap; make sure to let it cure for 24 hours for the best adhesion:
After you screw the blaster together, you sure be getting around 55 feet flat with great quality darts. Enjoy!