HW100 ⒸPRE-CHAMBER INSERT

If you are having problems with the original regulator or you want to increase the fill capacity of your cylinder, you can install a regulator inside the air cylinder and bye-pass the original regulator inside the block by removing the spring & ball bearing from the brass valve. When you bye-pass the original Weihrauch regulator (inside the block) with a regulator that fits inside your air cylinder, you can remove the original regulator in the block and fit our ⒸPre-Chamber Insert - this will maximise air efficiency considerably and provide extra shots per fill (especially on a .177 carbine - the most air inefficient model).

A standard HW100 has a very small pre-chamber/plenum. The air required to fire each shot is firstly supplied/drawn from the plenum, if there is not enough air to supply the full shot, then the remainder required is drawn from the air cylinder through the regulator. This is extremely inefficient.

Designed by our own Engineers, our kit allows you to double the pre-chamber/plenum and provide a much more efficient, instant supply of air per shot - increasing consistency AND shot count. All of the air needed for each shot is there, inside the pre-chamber doubler insert, ready to go.

PLUS if you have one of our Titanium Air Tubes, or 250bar Titanium Cylinders you can fill the air cylinder to 250bar which will usually DOUBLE your original 200bar shot count.

Please note: The Pre-Chamber Insert is not suitable for the old MK1 HW100.

BUY THE KIT HERE

Fitting Instructions

What you get in the kit

Pre Chamber Doubler Sleeve/Insert, Sachet of grease & the following seals: 2666, 2665D, 2674B, Main Valve Internal & 2658

Break down the gun

The red arrow points to the part of the block that we are working on in this guide.

Remove the Regulaor

Remove the Brass Valve

Remove the regulator adjuster/tension screw and the belleville washers.

Remove the Brass Valve

Remove Regulator Parts (MK2)

Remove the Brass Valve

Remove the brass regulator valve from the block.

Remove Regulator Parts (MK2)

Remove the Reg Piston, Piston Sleeve and Inlet Valve B (2674B) seal from the block.

Take the Valve Apart

Remove Regulator Parts (MK2)

Remove the spring and ball bearing from the middle of the valve, replace the seal (supplied) called "Main Valve Internal"

Seal the Valve

Insert the Pre-Chamber Sleeve

Place seal No. 2666 (supplied) onto the back of the brass valve. Remove the old seal from the front of the brass valve and replace it with seal no. 2665D (supplied).

Insert the Pre-Chamber Sleeve

The sleeve already has a seal on it, put a small amount of grease (supplied) around the seal and insert the sleeve into the block with the flat end facing the back of the block.

Pre-Chamber Sleeve Inserted

Insert the Pre-Chamber Sleeve

Pre-Chamber Sleeve Inserted

This is what the back of the block should look like.

Add Seal 2674b

Install the Brass Valve

Pre-Chamber Sleeve Inserted

The sleeve is in place, now add seal no. 2674b

Install the Brass Valve

Replace the brass valve.

IncreasE Titanium air cylinder fill from 200bar to 250BAR

What you will need:

(1) One of our Titanium Cylinders with In-built "Evo" Reg OR a titanium air tube - our titanium tubes are exactly the same size and shape as the original Weihrauch Air Cylinder (but 45% lighter), so you can unscrew the end caps from your Weihrauch Air Cylinder and screw them onto the titanium tube. You may need one of our End Cap Removal Tool Kits as the end caps are sometimes hard to unscrew, although they only need to be on "hand tight". Follow this Guide on how to remove the end caps safely.

(2) A Pre-Chamber Doubler Kit

(3) If you are not using our Titanium Cylinder & In-Built "Evo" Reg and you have purchased just the titanium tube, you will need an after-market regulator to go inside your air tube (ie. HUMA-Air or Lane Regulators make in-tube regulators to fit inside the Weihrauch HW100 sized air cylinder). You will need to follow their instructions for fitting - we do not service or fit these after-market regulators. Set the regulator to approx 80bar.

If you use one of our Titanium Cylinders with In-Built "Evo" Reg, this will give you a greater shot count than using the "tube only" and a separate after-market regulator option - this is because our regulators are housed INSIDE the end cap of the air cylinder and it doesn't take up any space inside the tube itself like the after-market regulators do. More space in the tube for air means more shots!

Please note: as with all of our kits, you will need to have an understanding of the internal workings of the HW100. Our kits are designed for professional use.

HW100 ⒸPRE-CHAMBER INSERT

Fitting Instructions

What you get in the kit

Break down the gun

Remove the Regulaor

Remove the Brass Valve

Remove the Brass Valve

Remove Regulator Parts (MK2)

Remove the Brass Valve

Remove Regulator Parts (MK2)

Remove Regulator Parts (MK2)

Remove Regulator Parts (MK2)

Take the Valve Apart

Remove Regulator Parts (MK2)

Remove Regulator Parts (MK2)

Seal the Valve

Insert the Pre-Chamber Sleeve

Insert the Pre-Chamber Sleeve

Insert the Pre-Chamber Sleeve

Insert the Pre-Chamber Sleeve

Insert the Pre-Chamber Sleeve

Pre-Chamber Sleeve Inserted

Insert the Pre-Chamber Sleeve

Pre-Chamber Sleeve Inserted

Add Seal 2674b

Install the Brass Valve

Pre-Chamber Sleeve Inserted

Install the Brass Valve

Install the Brass Valve

Install the Brass Valve

IncreasE Titanium air cylinder fill from 200bar to 250BAR

What you will need:

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