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Old 03-25-2020, 07:59 AM   #1
Young Gun
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Join Date: Mar 2020
Posts: 5
Fps issue

Hello there guys.I am having a problem with my aac t10 rifle.First of all i just bought it and i have changed the spring with action army 160m, i have also installed a steel ball bearing spring guide and the action army blue piston. The problem started the moment i checked on my chrony(xcortech 3200).With .20 bb's and with no hop up adjustment it showed me 565 fps the least and when i adjusted to full hop up with the same bb's weight (.20) it showed 607....I know you might tell me tha it is a joule creep and that i must check it with heavier ones but here the limitations we have are only to the fps count. I have ordered from a local store some parts like maple leaf jet leaf barrel , maple leaf hop up bucking , steel cylinder nozzle and a 150 spring hopping that the phenomenon will go but what do you think.Is there anyone that found a solution to that annoying problem?
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Old 03-25-2020, 09:17 AM   #2
Jr. Sniper
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Posts: 318
It is a well known fact that VSR type rifles gain fps with increased hopup. Not from personal experience, but what from I've read. I believe the t10 is pretty much a VSR?
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Old 03-25-2020, 09:48 AM   #3
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Join Date: Nov 2018
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That's right. Increased hop up will increase fps on all bb weights in a VSR type system. Even the T10.

This is why it is so important to reset the hop up for how you like it every time you change bb weight so that you know what your actual joule output on that weight is.

Alternatively it can really screw you if your field only chronos for .2g but you leave your hop up set for .48g. So I usually turn my hop down at chrono or make then use joules with the bb weight I intend to use.
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Old 03-28-2020, 07:20 AM   #4
Young Gun
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Join Date: Mar 2020
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Just a small update to the previous post..I changed the inner barrel with a crazy jet 428mm i put a hop up rubber from maple leaf .75 and i also change the spring from 160m to 150 m.The joule creep is now gone and the rifle shoots 528 consistently. I hope that this post will help also others
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Old 03-28-2020, 12:44 PM   #5
Young Gun
Join Date: Feb 2020
Posts: 43
@texas.john, I was wondering about AAC T10.
1) How is the stock inner barrel? Any idea of the material and inner diameter?
2) I know the stock piston and spring guide are polymor plastic and must be changed. My question is, you kept the original stock trigger unit, right? Is that, 45 degree or 90 degree? Do you think this trigger unit is durable enough to handle the m160 spring or higher spring?
3) How is the stock cylinder and receiver, does it cock smoothly? How is the stock nozzle?
Thank you.
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Old 03-29-2020, 03:56 PM   #6
Young Gun
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Join Date: Mar 2020
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I forgot to add that i also installed a steel nozzle with 2 oRINGS in the front.in general the rifle didn't stay stock.Instead i changed some part's the moment i bought it (spring 160m ,spring guide ,piston)and in the following 10 day's i installed steel nozzle ,spring 150 ,maple leaf crazy jet ,maple leaf bucking 75degree. Next upgrade will be cylinder and trigger mech. But for now i run stock trigger and cylinder .....But i have cut a piece of plastic cylinder and used it as a spacer between the cylinder and reciever and it works fine Doesn't jam or dry fire
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