Upgrading KALASH RK-02

[ofirn2008]

what parts should i upgrade. i am not looking for RPM or more FPS. i am looking for accuracy only.
thank you.

[ancorp]

The inner barrel and the hopup rubber are most important.

[m102404]

Accuracy comes from
#1. Consistent shot to shot velocity.
#2. Accurate tight bore
#3. Quality bbs (heavier weights such as 0.28g or 0.30g)

#1 and #3 are essential.
#1 is greatly influenced by the quality of the airseal between the piston head and cylinder, how well the cylinder head seals the cylinder and how consistent the air seal is between the nozzle and the cylinder head (it can leak a bit...but it needs to leak the same amount every shot. Then a huge consistency factor is how the nozzle seals up with the hopup unit/hopup rubber. Quality counts here...there's not a whole lot you can adjust.

#2. Stock barrels range from 6.10mm (junk) to 6.08 (TM stock). 6.04mm is a good old standby (SystemA is fantastic). 6.03mm (Madbull Black Python ver2) is one I've been playing around with lately (I've installed them into 10 or so rifles so far). The 6.03mm get very tight...so any odd bbs will jam (vs. just go a bit wild when shot out)...so see #3.

#3. BBbastard are great and readily available. I've used lots of KSC 0.30g Perfects...because they're cheaper for more. Shoot a couple of different weights...0.25g as a starting point. Bet you like the 0.30g bbs.

What to upgrade?....depends on where your rifle needs fine tuning.

[ofirn2008]

thank you very much for helping me with this important info. so upgrading to systema barrel and good quality rubber hop up and i will start using 0.25 KSC or G&G, thats will be enough?
i forgot to say that i have 118 m/s stock. 390 FPS. i measured that on chronograph.