TM-P90 or TM-P90TR marui

[black-turn]

Hi everyone.

I have a big probleme. i dont know which one to buy.

AEG Electric Tokyo Marui FN P90 Assault Rifle PDW Airsoft Gun

Or

Electric Tokyo Marui AEG P90 FPS-325 Red Dot Sight Airsoft Gun

I don't know which one to buy and what kinds of upgrades i can make on these guns so help me to find the powerfull one!

Sorry

[Savage Haggis]

Next time... Google it, mkay?


Item Code: AC-AP-AEG-P90
Airsoft Guns Categories: Airsoft Press e-Book Tutorials & Manuals
Weight : 0.25LB
Airsoft Guns Styles: P90 Airsoft Gun
Airsoft Manufacturers: Airsoft Press
Stock : Yes
Model: Airsoft AEG P90 Upgrade
Description

Airsoft Press eBook Manual
- Thorough Indepth Review on Airsoft P90 AEG Rifle Upgrades
- Step by Step Illustrated directions and tutorials
- Perfect for Novice or Advanced Airsofters
- Addresses Tokyo Marui, Classic Army, ICS, and other varieties of Airsoft AEG Guns
- A Must have for any player of the Airsoft Sport
- Contains over 120 Pages of Illustrations and Guides
- Click on More Info for Table of Contents

Table of Contents
END USER LICENSE AGREEMENT
PREFACE
INTRODUCTION

GETTING READY
TOOLS YOU’RE GOING TO NEED
PROPER HANDLING OF THE SCREWS
THE PROPER WAYS OF TAKING HINGS APART AND PUTTING THEM BACK TOGETHER
PRE-UPGRADE CONSIDERATIONS
DISASSEMBLING THE P90
ADDRESSING SEVERAL P90 SPECIFIC PROBLEMS


HIGH FPS UPGRADE
What is proper usage?
What are the key elements of a high FPS setup?
FPS increase in meter readings VS performance increase in a practical sense: the law of diminishing marginal gain in performance.
0.20g BBs versus 0.25g BBs versus 0.30g BBs: the heavier the better?
Does FPS always go hand in hand with Joule?
What is the difference between the FPS system and the Joule system?
How do you use FPS to measure Joule?
How do you use FPS to give an estimate of the range?
Higher FPS = lower ROF?
Softer spring = Higher ROF?
Harder spring = Lower ROF?
Is 8.4V insufficient for an upgraded mechbox?
Does battery size matter?
Is battery power important for semi-auto firing?
EG-1000 and other alternatives
Why (and why not) should I buy the high torque gear set?
Why (and why not) should I use helical gears?
Why (and why not) should I keep the stock plastic bushings?
Why (and why not) should I replace the stock plastic bushings with metal bushings?
What is an easy way to (more accurately) shim?
How do I tell if shimming has been done correctly?
What is the recommended order of gear insertion?
Longer spring versus shorter spring: the longer the better?
What are the major parameters of a spring?
Is a harder spring more harmful for the internals?
Installing a long spring: tricks and potential danger.
Installing a short spring: tricks and potential danger.
Why (and why not) should the spring be ground?
How to facilitate spring spinning?
What is a variable pitch spring? Is it always better for AEG?
Use of spacers for spring compression: tricks and potential danger.
What is wrong with a custom made spring?
Systema Springs versus PDI Springs
Can stainless steel spring offer better FPS?
Can Telfon Coated spring offer better FPS?
What can I do to reduce stress on the gears?
Can an EG1000 increase FPS (through higher torgue) over an EG700?
Why (and why not) should I use a Bore-Up Cylinder?
Why should I replace the stock cylinder on my P90?
Different guns use different cylinders that have different number and position of openings. Why’s that?
Is it useful to block the cylinder opening altogether?
Why is it useful to put holes on the piston head? Any alternative?
Why (and why not) should I use a metallic piston head?
How about a silent head set?
Is aluminum piston more durable?
Is the stock mechbox too fragile for M130 or above?
How do I effectively reduce heat on the motor?
Why (and why not) is the one o’clock gear timing an issue?
Can I still use the smaller batteries to power my upgraded mechbox?
I want to hide my battery inside the grip and the stock but the battery cells are too big. What should I do?
Chaining up your batteries: Parallel VS Serial configurations.
Should I use Sanyo battery cells for maximum performance?
How safe is it to remove the fuse? Any alternative?
Why (and why not) is it necessary to replace the stock wires?
Why is it necessary to shorten the wires?
Why (and why not) is it necessary to replace the stock Tamiya connector?
Are NiCd batteries superior to NiMH batteries for driving upgraded AEG?
How do I optimize the overall performance of the stock motor?
Is it possible to increase the torque of the stock motor? If so, how?
What else should I buy for a high FPS configuration?
What is wrong with the soda can test?
What is right with the soda can test?
What is the most accurate way to measure FPS?

HIGH ROF UPGRADE
What are the key elements of a high ROF setup?
Can I increase the ROF while keeping the FPS at the stock level by using 9.6V battery?
Voltage VS mah – which one matters the most?
Can I increase the ROF by replacing the mechanical contact switch with a solid state switching mechanism based on MOSFET?
Can I increase the ROF by using capacitors at the power source?
Is high ROF a major cause of tappet plate breakage?
ROF-wise, why (and why not) should I replace the stock plastic bushings with ball bearings?
ROF-wise, why (and why not) should I replace the stock plastic bushings with metal bushings?
How about oil channel bushings?
Why (and why not) should I buy the high speed gear set?
Should I upgrade to a Teflon Cylinder?
How about a high speed cylinder set?
What makes a ball bearing spring guide meaningless for a stock TM gun? How to work around?
Is there any cheaper alternative to ball bearing spring guide?
Why a ball bearing spring guide alone may not increase the ROF?
Can I use a Version 2 spring guide in a Version 6 mechbox?
Should I upgrade to a Systema high speed motor for higher ROF?
How do I optimize the stock motor’s RPM without spending major $?
How can I increase the ROF while keeping the FPS at near-the-stock-level?
What is the right type of spring and battery to use for this purpose?
Is ROF over 30/sec possible?
What is the major ROF bottleneck?
Is aluminum piston better off for a high ROF configuration?
Are lighter gears better off for a high ROF configuration?
What else should I buy for a high ROF configuration?

HIGH ACCURACY UPGRADE
What are the key elements of a high accuracy setup?
How to improve accuracy with short barrel?
Can a long barrel deliver higher accuracy and range?
Why (and why not) should I replace the stock cylinder when using a longer inner barrel?
What is good about a high precision barrel?
How to maximize the effectiveness of a high precision barrel?
What is the drawback of using a high precision barrel?
How do I hide the longer inner barrel?

TROUBLESHOOTING
My stock P90 is dead after approximately 3000 shots. Why?
What will happen with improper shimming?
And what should I do to remedy the problem?
How do I prolong the life of the mechbox?
When the mechbox is running, the nozzle does not move at all. What is wrong?
My mechbox got stalled after replacing the tappet plate. What’s wrong?
What cause the piston gear to break prematurely?
My stock motor was overheated. What should I do?
What should I do for proper motor maintenance?
What causes gear stripping?
What can cause the hopup rubber to break?
How to prolong the life of my battery?
Is slow charging always good for my battery?
How to safely charge a battery?
Is NiMH battery free from the memory effect problem?
Should I fully discharge the battery every time after use?
How do I fix the battery memory effect problem?
My gun keeps mis-firing. How do I tell if this is a magazine problem or a mechbox problem?
I suspect that the hi-cap magazine is not working. What should I do to fix it?
What causes double feeding?
What needs to be regularly replaced to keep my gun in good shape?