Modify PIN EXTREM KIT / GEN1 | HDR 50-L, HDR/TR 50, HDP/TP 50, HDR/TR 68, HDB/TB 68, HDS/TS 68 | Extreme Power Increase

Modify PIN EXTREM KIT – maximum power without a valve for Umarex T4E GEN1

The Modify PIN EXTREM KIT upgrade is designed for first-generation Umarex T4E guns. This technical set removes the need for a valve and restrictor, thereby providing extreme performance and consistent CO₂ pressure directly during the shot. The specially modified and precisely shaped pin tip ensures a more uniform and noticeably stronger flow of gas into the chamber, which achieves a much higher effect of each shot from the gun. It is an ideal choice for users who require uncompromising ballistic parameters from their gun for self-defense or training shooting.

The entire kit is made of highly durable stainless steel, which handles high pressures and mechanical stress without any problems. The installation is designed to be smooth and does not require irreversible modifications to the gun's internal mechanism. This means that you can carry out a reverse conversion at any time and return the gun to its original state. Due to the extreme increase in gas flow, it is necessary to expect a lower capacity of shots per one capsule, which ranges between 6–10 rounds, but with the maximum possible energy. When installing and using a modified gun, always pay attention to safety and follow local legislation regarding the power of guns.

Key features and advantages

• Extreme performance: Increasing the shot power by removing the restriction elements in the gun.
• Optimized flow: Specially shaped pin tip for a smoother distribution of CO₂.
• Quality material: Made of stainless steel for maximum durability and reliability of the gun.
• Simple assembly: Reversible installation without the need for permanent modifications to the gun body.
• High efficiency: Ensures consistent pressure for every single shot.

Technical parameters

• Compatibility (GEN1): HDR/TR 50, HDR 50-L, HDP/TP 50, HDR/TR 68, HDB/TB 68, HDS/TS 68.
• Material: stainless steel.
• Shot capacity: approx. 6–10 per CO₂ bulb.
• Valve assembly / disassembly: not needed.
• Reverse conversion: yes, installation is reversible.

Frequently Asked Questions (FAQ)

Is this kit compatible with the new GEN2 series as well?
This specific model is intended exclusively for first-generation guns (GEN1). For newer GEN2 models, it is necessary to use the corresponding version intended for the given mechanism.

Do I have to change the seals in the gun during assembly?
During installation, we recommend checking the condition of existing seals. If they are in good condition, their replacement is not necessary, but to achieve maximum tightness and performance of the gun, it is good to treat them lightly with silicone oil.