For Maruzen APS-2.

Get more durability & save money.
This set has a Precision Cylinder,Taper Cylinder Head,Spring Guide & Hard Piston. If you want total upgrade,this set is lower cost than you purchase each item.
The feature is a Hard Piston.That's superior to maintenance and No VC system would be strong against damages.

Please check if you know more detail each parts,please here
Precision Cylinder / Taper Cylinder Head / Spring Guide(APS-2) / HD Piston(APS-2)

Precision Cylinder : Toughnes & beauty Cylinder
We adapt new technology of 01 & 05 inner barrels called "cold hammering".This cylinder is same accuracy as Inner barrel. The inner diameter tolerance is 1/100mm In spite of cylinder.
We have never seen as this accuracy tolerance of this cylinder.

4 parallel pins
We use 4 parallel pins(Dia.3mm) to combine the boss end with cylinder body.No other makers is stronger than ours.Almost maker use a split pin which is weaker than parallel pin.

The welded points
Combine shaft & End Boss.


※The tolerance described by our company refers to the "straight" part which is not machined. The slotted part is not related to the airtight performance so its tolerance is not design to be as tight as other places.

Taper Cylinder Head
Made of SUS303. The nozzle's length is for APS-2.
Its tapered line is the best suited angle for airflow.

Hard Piston
The body: Made of Duralmin.
The End: Made of Stainless steel.
We use most suitable materials for each parts, so this piston has high durability.
Hard Piston can make more velocity than Vacuum Piston because of its hight airtight.

※If use this piston to extreme power spring as PDI SS,SPR & over 2J setting,it's possible to be shorter life.
Because those sprigns gives extreme power over Toy. It's up to your operation & maintenance.

Spring Guide
Made of Stainless and Polished,so it makes smooth action.
It has a thrust ring that made of derlin.
Please use PDI APS Spring , SPR or SS. Not available with normal spring cause our shaft is heavier than normal.
※If you use some higher power springs like SPR or SS series,those may damage your rifle.Please be careful.