Tokyo Marui P90 and Type 89 tweeking

I don't really mod my guns as such more tweek them to iron out little idiosychracies that are annoying as fuck or to optimise their performance. Generally I prefer my guns to have a slightly higher rate of fire - enough to avoid that sewing machine noise - and as close to site limits as feasible; around 350fps but anything over 320 with 0.2 bbs is fine. The following two are mid range guns from Tokyo Marui that have had the treatment.

Tokyo Marui P90

This was one of my first guns and by far the easiest to work on. Original work involved Swiss cheesing the piston, changing the piston head, adding metal bushes, a more powerful spring, a G&P M120 high speed motor and fitting a PDI 6.01 stainless barrel. It was and I'm sure still is very prone to double firing on single shot but after much head scratching, fiddling with the trigger mech and cut-off lever it now appears to be working fine. As part of this the wiring to the motor was redone and an Extreme Fire SW-SF mosfet was fitted.

Externally, there is a King Arms flash-hider for a Gemtech SP90 silencer, a front swivel sling and a rear mount swivel sling as well. Current choice of optics is a low rail mount Aimpoint T1.

Tokyo Marui Type 89

Mainly stock but has metal bushes and an uprated spring. While originally pushing 345fps it has dropped to around 325 to 335fps; probably due to sitting around for a while. The stock motor is excellent but I think it needs something with a bit more speed so thoughts are currently leaning towards a Lonex A1 long motor - a high speed motor as opposed to the high torque Marui version fitted as standard. Battery space is at a premium on these guns so anything bigger than a 8.4v NiMH stick doesn't fit. I have managed to source a couple of Firefox 7.4v 1,600mah LiPo stick batteries which give a slightly higher rate of fire; rated at 20C which gives about 32 amps.

Externally, a left hand selector lever is fitted as well as a RIS rail. the rail is fairly short and the low mag scope which has an integral mount only just catches the end of it. The scope rail had to be modded to allow the second securing mount to be used. The scope has a pretty good eye relief and works surprisingly well with the reticule only just above the sight line of the iron sights.