So over the last few months, I've been in the process of upgrading my VFC MK12 SPR into a rifle with more accuracy at longer distances.
The first thing I did was replace the spring with the downgrade spring that came with the gun, correct AoE and change piston head o-ring. After some games, it was shooting good but still lacked some range.
I decided to swap out some stock parts to improve this.
-Prometheus ms135 spring (advertised on ehobby to shoot 380-390)
-SHS tappet plate
-element silent piston head
-5KU double o-ring tapered cylinder head
-modify o-ring air nozzle
-Madbull shark hop up rubber
-Madbull 6.03, 509mm inner barrel
The gun was shooting much better. Never got to really game it tho, since the stock VFC piston stripped. So I swapped it with a madbull polycarb piston.
Now comes my issues...
Even with a fully charged 9.6 NiMh battery, after 5 min of shooting, there's not enough juice left to fully pull back the piston. After some research, I'm concluding it's because this spring is shooting closer to 440-450 fps.
So i'm thinking to either swap back to original spring, which was only shooting approx.360-370fps, or get a stronger battery/motor.
I'm also thinking about going back to the stock piston head/cylinder head + spacer, since I've been reading that the silent piston head/cylinder head is just a gimmick, and I cant have corrected AoE with the silent combo.
I've also read of other mods, like shaving the tappet plate to allow the air seal nozzle to seat farther in the hop up.
So now I'd like to turn to the experts, and hear what they have to say
it would be nice to get more range out of this gun. Otherwise I'd rather play a gun that isnt so long lol