About Modify
MODIFY contacted us to test their upgrade parts for airsoft replica's and to provide feedback and improvements on these items. First some more information on MODIFY. MODIFY is a company from Taiwan specialised in precision metal parts, turning industry tools and precision machine attachments such as Airsoft Custom Parts, R/C Car Upgrade Partsetc. They have 40 years experience in the industry and their products have a high reputation for quality and value. However MODIFY was unkown for us and we suppose quite unknown in Europe (back in 2009). They mainly aim at high quality airsoft upgrade parts and accesoires. We are also very pleased that they are interested in consumer feedback and that they are willing to listen to feedback to improve their products even more. We would like to thank MODIFY for providing this opportunity to NLAIRSOFT.COM. Please read along and find out more about MODIFY and their airsoft upgrade products. To be clear we have tested parts for M16/M4 series, however MODIFY provides upgrade parts for nearly all Tokyo Marui replica's!

How does an AEG work?
For those who don't have a clou how the internals of an AEG work, please find the art impression below to give you an idea. Thenks to Mechbox.com for the great artist impression!

First Impression
The upgrade kit comes nicely packaged, with the parts snugly fitted into the foam nice and compact. The kit contains the following: cylinderhead, cylinder, piston, pistonhead, nozzle and the springguide offcourse. Actually all the parts look very well built, well designed, good finish and solid! We were very impressive and glad to see we have received some top quality material here... The modify kits are there for all sorts of airsoft replica’s, as we mentioned MODIFY provides for nearly all Tokyo Marui and compatible models upgrade parts.

• The cylinderhead is a double o-ring type for better sealing
• The piston is a polycarbonate one light and durable
• The pistonhead comes with a bearing
• The springguide also comes with a bearing

Cylinderhead & Cylinder & Nozzel
The MODIFY stainless steel cylinderhead is a cylinder head with a double O-ring so that it has a better seal. On the MODIFY cylinderhead there is also a foam ring, the foam ring has 2 advantages; first it makes your gearbox quitter and second because of the foam ring there is less stress on your gearbox shell when your piston hits it. I took the cylinderhead and it fitted nice into the cylinder. However there was a small problem which we have passed through MODIFY. When installing the cylinderhead to a reinforced gearbox (6mm) of a Classic Army M15A4 Rifle their appeared a slight problem. Well the problem was that the cylinderhead did not fit over the 2 nocks in the front of the Classic Army gearbox. I also had a Tokyo Marui M733 with a stock Tokyo Marui gearbox lying around and in there the cylinder head fitted nicely and snug. MODIFY already made some slight adjustments and soon we will receive a new Classic Army compatible set. Stay tuned on a update on this review for our final results and thoughts.

The modify cylinder is a steel one witch is very nicely polished and very smooth. Nothing more to say really. High quality cylinder against good pricing!

The modify nozzle is a nice touch to the kit! The nozzle is a plastic nozzle, it will alow a better flow trough of air and will insure les air leaks witch insures a better and constant fps. This also thanks to the added O-ring...

Piston & Aluminium Piston Head
The piston that comes with the MODIFY kit is a polycarbonate piston with 1 steel tooth. This piston looks like a Tokyo Marui one only from a much higher quality material, some may choose a aluminium piston over a polycarbonate but for the velocities that are normal in Europe a polycarbonate piston is a winner. A polycarbonate piston is lighter then aluminium and will cause less stress on the gearbox and less noise. The piston looks rock solid and looks that it can handle heavy gearbox loads. However we adviced to introduce an all steel teeth piston for ultimate performance, this will be send together with the Classic Army compatible parts. Stay tuned on the update about this...

The pistonhead is an aluminium pistonhead and has a bearing that seals the cylinder very well, the piston head is a ported design. The website states that it is made of aircraft aluminum alloy. The bearing on the piston head, makes sure the spring can rotate as it gets wound up so it can perform at its best. This will also lengthen the life span of the spring. Also will the bearing cause an additional fps, around 5 fps. We were also very impressed that the parts all fit very well, they are indeed 100% air thight and no FPS will be lossed. This has been tested with our finger on the nozzel and pushing the piston through the cylinder. It was truely impossible to do this, it all was air tight!

Springguide
The springguide in this kit is a full steel springguide with a bearing, the full steel springguide is also well constructed but has another slight problem when you try to fit it to a Classic Army gearbox use’s pins to get it instead while a Tokyo Marui gearbox uses round pins to hold it in place instead of the flat ones, this again will be addressed in a kit that is Classic Army compatible. The full steel springguide will make more noise then a stock plastic one but is a lot stronger and the bearing again insures longer spring life and a slight increase in fps. This springguide base and the two wings are shaped in one-piece, this to make a high durability. The two wings are the weakest part of a spingguide and MODIFY ensured this problem is history. This springguide can handle up to a M170 spring, so don't worry about any durability! Using it with a M120 spring (340-350 FPS) will make it run for ages.

Pricing
Here some European retail prices of the MODIFY parts. They look extremely low, but i think they are right. We will compare them with some SYSTEMA parts, just a fast price comparison:

• MODIFY Bore Up Cylinder Set 60,00 EURO
• MODIFY Bore Up Nozzle 10,00 EURO
• MODIFY Bore Up Pistonhead 20,00 EURO
• MODIFY Fullteeth Piston 20,00 EURO
• MODIFY Bore Up Cylinder M16A2 17,00 EURO

• SYSTEMA Nozzle 12,50 EURO
• SYSTEMA Alluminium Pistonhead 25,00 EURO
• SYSTEMA Red Piston 31,50 EURO
• SYSTEMA AREA 1000 CYLINDER FOR M16 12,00 EURO

We have used some prices from Stormtec and Arco & Frecce to compare. First of all we think the quality of SYSTEMA parts and MODIFY parts are comparable here. So we do not compare aplles with pears here. As you can see prices on MODIFY are very well! Most of the parts are below SYSTEMA prices and quite a lot. However the AREA 1000 cylinder of SYSTEMA is a little cheaper but we do not know the quality of it and so we don't know if it is comparable or not.

Overall
These parts of MODIFY do see a bright future we think. Good quality parts with good prices! And the company itself is listening very good to feedback and has great service. Compatibility problems will be solved soon! Stay tuned on this review since we will provide an update when the improved Classic Army compatible parts have been received. When we have fully upgraded our Classic Army gearbox we will also take some nice shots of the internals installed!

External Links

• www.modify.com.tw
• www.com-bat.nl

About Modify
MODIFY is a company from Taiwan specialised in precision metal parts, turning industry tools and precision machine attachments such as Airsoft Custom Parts, R/C Car Upgrade Parts etc. They have 40 years experience in the industry and their products have a high reputation for quality and value. MODIFY is still a new brand here in Europe, but rapidly increases it's popularity. They mainly aim at high quality airsoft upgrade parts and accesoires for the gearbox. We would like to thank MODIFY and also Begadi.com for providing us this review opportunity. Please read along and find out more about the MODIFY Modular Gearset.

First Impression

Build Quality
This is how the Modular gearset comes in it's package. Well protected. The complete set, some Stainless bushes (6 pieces), Modular gears with tempered stainless bushes (double oil grooves), Synthetic lubricant with PTFE, a little A4 manual and the Anti-reversal latch.

Installation
Here starts the most enjoyable part of all this. We are ready to install the MODIFY Modular Gearset, see how easily it will fit in. Please follow the detailed installation pictures below, and also check the picture comments we made!

Performance
We will do extended performance test during our next skirm. Rate of Fire and FPS will be checked. We also have a nice supprice, we will test this MP5 with a new SYSTEMA Speed motor. This really sounds like an ultimate speed version! When we have enough time we hope to compare this speed set, with a torque set! So a MODIFY Torgue Modular Gearset and a SYSTEMA Torgue motor. We will also compare it with the stock CA parts. We are exited and will keep you posted, stay tuned!

Overall
The beauty of this product is that it combines high quality standards together with innovative design and functionality.

Conclusion
This is where we round up, our final thoughts on the complete review:

Pro’s
    + Very easy to install.
    + Well priced.
    + The gears come in a rock solid unit.
    + Properly aligned, no shimming needed.
    + Will fit nearly all brands of gearbox (except CA reinforced, remark: we did not test all).
    + Will work in non-aligned gear boxes.
    + Comes in a very complete set, all you need is available.

Con’s
    - Individual gears can not (yet) be replaced.
    - For those who love CA, it will not fit into an reinforced gearbox!

I will give the Modify Modular Gearset an 8 out of 10! I really would like to give it a 10 out of 10 but I found 2 minor con's (where the CA gearbox is not even MODIFY their fault). However this Modular Gearset is very impressive, the first gears MODIFY make and they nailed it! Most important is that the innovative design is a large step forward in gearbox engineering. Some good idea's and engineering really made this a very nice and easy to install kit! It only takes several minutes and you don's need to worry about shimming issues. It is great to see how it combines high quality standards together with innovative design and functionality. We like MODIFY, give them a try yourself! You won't be disappointed.

We will continue to update this review on future performance!

External Links

• www.modify.com.tw
• www.begadi.com
• www.com-bat.nl

Introduction
The SYSTEMA PTW gearbox is very unique and innovative. Many wonder how the SYSTEMA PTW works and how the new gearbox type looks like. So we have made a closeup on this planetary gearbox to show how it is made. This will provide you some details and insights on this great piece of mechanics. This is the way SYSTEMA puts it:

Quote
    "Revolutionary implementation of the planetary gear box allowing the weapon to operate smoothly and reliably under high internal stress, while reducing the overall package dimension.
    Compared with the conventional reduction mechanism with three shafts, the planetary gear has only two shafts, allowing for a more compact mechanism. The planetary gear, which originally had three gears, was redesigned to have four in order to provide higher durability for the thrust load when using a high-rate spring.
    Due to this effort, we succeeded in reducing to the greatest possible limit the backlash caused by the gears biting each other, resulting in realizing the best in transmission efficiency."

When opened you are able to see how compact and small everything is. This is the MAX gearbox from the PTW challange kit also named "do it yourself kit". This gearbox is practical the same to all PTW gearboxes out there. In total the gearbox includes 28 parts! Please find more information in the exploded views we included at the end of the review. This particular MAX gearbox is made to withstand a 160m/s spring and almost NO maintenence needed. Many new to SYSTEMA PTW ruin their gearbox by adding grease/lubricate because it looks dry. The problem is that the gears are so tight made together that thick lubricate would blow the gears or make it very hard to turn and blow the fuse/melt curcuitboards. So no further lubrication is needed, please be carefull with that!

Taking a closer look on the gears you would notice that this is really nothing like a regular Ver2 AEG gearbox.

Operation
When looking from this angle I would try to explain the operation of the gearbox. To the left you got the curcuitboard EL-001 and got a switch for the trigger. It also got a photoswitch that check the position of the main gear so it would always return to normal position. The two holes in the main gear is for the photoswitch to see trough. Top left you got a white switch that is connected to the bolt catch. When the magazine is empty it press out the bolt catch and stop firing. When inserting a new full magazine you have to tell the electronics to restart so you could fire again and do this by pressing in the bolt catch that again press the switch. BTW!!.. The KUMI stamped in the gearbox is the name of the CEO in SYSTEMA :) Further not of any importance...

On this side you can see the electronic controle of the semi/auto/burst with the selector switch. The EL-002 got two microswitches. When the selector is set to safe the selector arm is to the right with no contact to the switches. When set to semi it press down the first switch and tell the electronic to fire one and one bb. On auto/burst the arm press down both switches and telll the circuit to do auto or burst after what type of EL-001 you got. If you want to lock to semi only you could either restrict the arm only to go to the first switch or you could remove the cable to switch two.

On top of the gearbox is a hole where the firmnes of the selector is adjusted. First there is a bearing ball laying on the selector switch. the selector switch got 3 dents on it where the ball would press down in for each selected Safe/Semi/Auto. You adjust how hard the selector should feel by adjusting the screw on to the spring that press down the ball. A nice function to set the firmnes of the selector to your own preferences!

Manuals
Download here the PDF document with exploded drawings of the gearbox. You will find part information also...

External links

• www.zshot.com
• www.systema-ptw.com
• www.systema-engineering.com