Quote:
Originally Posted by DONSTER 125
ROF is determined by the battery. if you are on that budget, change the piston head im told. that is first and foremost. the thing is a M120 will put your fps way up. if you later get a TB inner barrel, then you will be running really hot. thats why i said get the M110 spring. plus it will be easier on the gears if you are worried about that.
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ROF is altered by FPS, and systema doesn't make an M110, I assume you meant M100?
Anyway the systema M100 spring is 365fps which is great for any gun, your going to want to buy a new piston, piston head, bearing spring guide, shims, hopup rubber and air nozzle. Around 70$ shipped I think, I'm not doing any math for you. Systema everything, but a guarder clear hopup rubber. Good upgrade for under 100$
Tightbore barrels will tighten your grouping, but the 5$ hopup rubber I find makes a bigger difference.