TM m4a1 R.I.S
 

hey guys i was wondering if i got a polycarbonate piston, area 1000piston head, PDI 150% spring, Guarder ball bearing spring guide for ver.2/ver.6, area 1000bushings ver.2/ver.3, and systema shims what fps this would put my stock Tm M4a1 R.I.S around.i was also wonderingif the Tm m4a1 R.I.S was version 2 or 3 gearbox.
thnx jordan

Somewhere between 360 to 410fps.

It's a version 2 gearbox. All armalites are v2 based.

thanks i guess i will order those than.:)

if i got a polycarbonate piston but kept my stock piston head would that effect my gun?

and is the PDI m150 spring the same as PDI 150% spring

If you use the stock piston head, your fps will on average be about 7-10fps higher than using the Area1000 piston head (at 400fps), but it will not be as consistent. I recommend getting a ventilated bearing piston head. The Area1000 piston head is ventilated but has no bearings.

PDI has no m-rated springs. Wherever you saw that must be a typo.

Well do too the airsoft canada store being out of stock some of my modifications have changed will you let me know if these parts will work for now.PDI 150% spring, guader polycarbonate piston, guader shim set, PDI oillite AEG bushings p1300.there are no piston heads in stck and no spring guides i am thinking of sticking woth my stock piston head for now and for a spring guide would a (systema with bearing VERSION 2) work. And if all thiswil work do you know if it will be in the 380fps range?

If you are putting in these upgrades you should probably go for a better nozzle too they arent too much like 10 bucks for a good one.

I have some ventilated bearing spring guides in stock.

The Systema bearing version 2 spring guide will work fine.

i actually ended up ordering a PDI 150% spring, guarder shims, Full replacement kit for your nozzle, cylinder head, cylinder, piston head, piston. Cylinder, PDI Oilite AEG Bushings - P1300 and i am now going to order a Systema bearing version 2 spring guide and wondering if these upgrades will put me over 400fps and if so what should i do to bring it down.

Just buy a TM velosity reducer.


**EDIT** as for over Im not to sure but if you are thinking the spring guide will give you +30 fps they dont they will give you about 5-10 more fps (or so I am told). Since the spring chart says pdi 150% spring will put you at 390 aprox. But you have to have the same upgrades as they do in thier gun when they did the test. Also all guns are different some might shoot over 400 fps with your upgrades some might do 380 no guns are the same.

yeah but i was wondering if these upgrades would even put it over 400 i also ordered a OPS USSOCOM M4 Silencer would this slow down my bbs a bit because of the added lenth and i dont want to have to use a velocity reducer if i dont have to i would rather take some stress of the mech box and get a smaller spring if i have to but only if the fps is over 400.

If you ordered that silencer thinking it either sileneced the gun or has a inner barrel sorry bud but it dosent (or Iam yet to see one that dose). It might muffle it a bit but not like a real silencer.

yeah i figured that but hopfully it looks good the only reaon i dont want to use a velocity reduser if i dont need to is because its smaller than my actual barrel and i heard it causes lots of jams and is not good for my gun

That I can tell you right now is not true about the jams I own one and have used it for years well since 2004 and never had a jam. As for bad for your gun i dont think it dose that either but if im wrong sombody correct me.