If krytac barrels are anything like kwa barrels, Lap that "female dog" you will get beautiful results out of it.
You will NEED a new piston with metal teeth I recommend the SHS pistons.
SHS Aluminum Piston Head, use loctite when installing the Piston Head, stretch the o-ring and let it sit in silicone lube for a few days.
SHS Aluminum Cylinder head, add some Teflon tape when installing
O-ring nozzle, I like the SHS one but most are very similar
Stronger Spring, M140
neo magnet motor, 18tpa or 22tpa its your decision, 18 tpa will have a faster ROF but with less torque and efficiency.
For deciding what cylinder to use I need to know what barrel length and BB weight you want to use
Bucking route route
-maple leaf 75 degree bucking, remove the mound and the flat hop mods
-laylax bridge nub
try extending the hop up window and if needed extend the barrel window to fit the full size laylax nub without cutting the tabs off.
HS5 r-hop patch original
Your hop up is fine, no need to buy another one It wouldn't make a huge difference.
glue some foam to the front of your gearbox and the front of your body to reduce shock
use some tape to "candy cane" your barrel so that it fits perfectly snug inside the outer barrel
file down a little off the front of the tappet plate to allow the nozzle to rest at the front.
If you have nice mags file a little bit off of the tappet "flag" (triangle thing that engages the sector gear) to allow the nozzle more time to rest before the piston moves forward.