「Maruzen APS-3 / Disassembly Process」
X-FIRE
「How to change the Sear and Hammer...」

This page explains "Disassembly Process" about Maruzen APS-3.
We make Sear and Hammer for APS-3.
If you want to change them for PDI upgrade parts and you don't know about APS-3, please see this page.
Tool for Disassembly Process...

・APS-3
・Minus Driver and Plus Driver
・Hexagon Wrench

You can start to dismount parts easily with them.
Please read below sentence about "Disassembly Process" and prepare what you need.

<Menu>

Cross-section view ...
You can see the positional relation about Hammer,Sear,and Trigger.

APS-3 Disassembly Process ...
Please read before starting disassembly.

Screws and Pins ...
We list size of Screws and Pins for the purpose of reference.

PDI Sear(Sear B / in Cross-section view) PDI Hammer
・PDI Sear A(Sear A / in Cross-section view)  
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<Cross-section View>



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<APS-3 Disassembly Process>
The parts name is same as "INSTRUCTION MANUAL" with APS-3.
*Please NOTE;
APS-3 has a lot of screws and pins.Don't lose them.(The list of Screws and Pins is HERE.)
1:Dismount the Front sight base.
This Pict is 1st. lot. It has small screw under the Front sight base.
2:Dismount the Outer barrel. 3:Screw and dismount Barrel block.It may be fixed too tight.If so, please use nipper with rubber or cloth.
4:Sometimes the Barrel Ring is still in Chamber.Please get it out with tweezers. 5:Dismount the Grip. Point!
Leave the screw in the Grip to put it easy.
6:Dismount Rear sight's screw.
You can do it at the same time NO.12.
7:Dismount Trigger Guard(front) 8:Push the pin out from Upper Cover.
9:Dismount the wire spring. 10:Get 3 screws out from Trigger BOX. Point!
Minus screw has small parts.Don't lose it.
11:Dismount covers(two sides) 12:Dismount the Rear Sight. You can do No.6 at the same time. 13:The Chamber is fixed by 3 pins.
They has different diameter and diameter.
Point!
We recommend that you remove the Comprest Cylinder with Hexagon Wrench after dismount Chamber.
14:Dismount the Chamber with folding Hammer.
15:Dismount the Hammer.
16:Push out the pin and dismount the Sear.(Sear B in Cross-section view) 17:You can dismount Sear A and Trigger after pushing out 2 pins(Red circle) Point!
Trigger and Sear B have Spring.
Trigger BOX has pockets for the Springs.
Completed.
You can build in PDI Hammer and Sear after above all process.
After set Sear and Hammer in, put Chamber and other parts back adversely.
Please NOTE;
*Please pay attention for the position of Upper cover when set the Chamber.If the posirion is wrong, you cannot set the Rear Sight later.
*Pins have different lenght and diameter.Please see HERE.
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<Screws and Pins>

Section Diameter / Length
Grip M4X30
Covers of Trigger BOX (Minus Driver) M2X18
Covers of Trigger BOX (Plus Driver)

M3X2.5

Trigger Guard M3X10
Section Length / Diameter
Chamber (3 pcs) From left,
17.8mm / 2.9mm
13.5mm / 2.4mm
13.5mm / 2.9mm
Rear Sight 13.7mm / 1.1mm
Sear B 12mm / 2.9mm
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<For Maruzen APS-3 Upgrade parts>
Sear
Made of S45C.It is hight durability.
Sale \2,030
We deem to get your agreement for the below policy when you place an order.
color
screw
Qty
<How to buil in>*At first, please dismount to No.16 in "Disassembly Process"
1:Set the PDI Sear in the BOX. 2:Insert the Pin.(Red circle) Point!
You can get more smooth trigger feeling if you scrub the PDI Sear (Point of Red circle) delicately.
IF you don't know disassembly process about APS-3, please see the " APS-3 Disassembly Process ".
After set Sear and Hammer, put it back adversely.
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Hammer
Made of SUS303.
Sale \ Not yet...
We deem to get your agreement for the below policy when you place an order.
The Hammer in the picture,it is production prototype.
<How to build in>*At first, please dismount to No.15 in "Disassembly Process"
 
1:Set the Hammer,Safty,Spring into BOX. (The Safty has the direction. )

2:Please pay attention for the position of Upper cover when set the Chamber.If the posirion is wrong, you cannot set the Rear Sight later.After that, fix with 3 pins(Red circle).

The Hammer in the picture,it is production prototype.
IF you don't know disassembly process about APS-3, please see the " APS-3 Disassembly Process ".
After set Sear and Hammer, put it back adversely.
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Please read the below policy
We deem to get your agreement for the below policy when you place an order.
○We couldn't assure the trouble with your lack of skill.
○It may be required to adjust to fit because our custom parts reduce the clearance of normal parts to lead the best condition.
○Do not use the 3rd party products.Because we design with Normal parts or PDI-products.
 If you ignore our rule & breake up your guns、we couldn’t be responsible.
○It is possible to change the spec or design