Kraken TAC-41 TDC Hop-Up Chamber + Cylinder Head

Kraken TAC-41 TDC Hop-Up Chamber + Cylinder Head - V2
*This V2 version features an improved wheel section where it is now possible to use the original Silverback metal ball click system.

Upgrade your TAC-41 with the Kraken TAC-41 TDC Hop-Up chamber! A true TDC hop-up chamber that uses GBB/VSR-style hop-up buckings, the preferred type of bucking for airsoft snipers.

NOTE:
When using the stock Silverback (SBA), GBB, or STALKER KRAKEN hop-up, we strongly recommend also using the STALKER Red Guide Rings to ensure the bolt enters the hop-up and hop-up bucking straight. This helps extend the lifespan of the BB stopper, hop-up unit, and hop-up bucking.
Link to the Guide Rings

Key Features:

• TDC V2 Hop-Up Unit
• Perfectly aligned, impossible to install incorrectly.
• Kraken TAC-41 Silent Cylinder Head with front and rear anti-impact rubber pads (mandatory for use with the Kraken TAC-41 hop-up).
• Compatible with GBB/VSR-style hop-up buckings (includes Stalker TAC41 Double Fin SR-hop 60° bucking).
• Weather-resistant nub compartment thanks to its unique design.
• Clicker Wheel compatible with the Clicker Ball Plunger system from stock Silverback hop-ups (produces clicks when adjusting).
• Only compatible with GBB inner barrels; the Morpheus Hybrid Barrel is recommended.

The Kraken TAC-41 Set Includes:

• 1x Main hop-up body
• 1x TDC wheel
• 1x Flat TDC nub (concave shape over the bucking)
• 1x Square spacer
• 2x Different O-rings for the hop-up wheel
• 1x Stalker Double Fin SR-hop 60° bucking
• 1x Kraken TAC-41 Silent cylinder head (inner nozzle diameter ~ 4.00 mm; the 4.00 mm air brake for the Scorpion piston is sold separately)
• Front and rear anti-impact rubber pads for the cylinder head
• 1x O-ring for the cylinder head
• 2x Flat locking screws

What makes this hop-up different and how does it work?

The design of the Kraken hop-up and Kraken TAC-41 cylinder head is optimized to position the BB perfectly inside the hop-up bucking, providing a more consistent hop effect and improving range and accuracy.

Additionally, the cylinder head includes two rubber pads that reduce the sound of contact between the cylinder and the hop-up unit, making the TAC-41 slightly quieter.

The hop-up unit design eliminates any possibility of misalignment between the hop-up and the bucking/outer barrel. It features two cutouts that perfectly match the Stalker TAC41 Double Fin SR-hop buckings.

The square barrel spacer and the two locking screws prevent any unwanted movement. In addition, the main hop-up body has a raised edge under the wheel to prevent water from entering the nub compartment.

Installation Instructions/Requirements:

A GBB inner barrel is required to install the Stalker Kraken TAC-41 TDC hop-up, and it may be any length you require.

⚠️ Important: Do not force the bolt forward. If it cannot be inserted into the housing, it may be due to:

• Not sanding the bolt kit screw sufficiently (see installation video).
• The cylinder head not being fully tightened into the cylinder.
• The front cylinder head rubbers not being installed correctly.

Installation Steps:

1. Disassemble your TAC-41 following the Silverback manual.
2. Unpack the Stalker TAC-41 TDC hop-up unit.
3. Install the Silverback metal ball clicker pin if you want the wheel to produce "clicks" when turning, or use the included O-ring if you prefer click-free adjustment.
4. Install the Stalker TAC41 Double Fin SR-hop bucking onto your GBB inner barrel.
5. Slide the main hop-up body over the bucking.
6. Slide the square spacer onto the inner barrel, with the arrow pointing toward the muzzle.
7. Install the screws through the hop-up body and barrel spacer to secure everything in place (choose the correct screws and do not overtighten, as you may damage the brass barrel).
8. Insert the barrel + hop-up assembly into the outer barrel, ensuring the spacers are properly positioned.
9. Place the flat TDC nub, ensuring the concave side sits on the hop-up bucking.
10. Carefully install the hop-up wheel by pressing the click ball inward and turning clockwise until the thread engages properly. ⚠️ Do not force the wheel.
11. Disassemble the cylinder and replace the cylinder head with the included Stalker cylinder head.
12. Install one of the two O-rings around the cylinder head to ensure a proper seal (use the thicker one if the other does not seal properly).
13. Attach the front anti-impact rubber pads to the cylinder head (remove the 3M tape and place them in the grooves).
14. Glue the rear rubber pad in place using a few drops of super glue.
15. If the bolt does not close properly, remove the screw from the original bolt handle.
16. Install the cylinder with all its components.
17. Reassemble your TAC-41 following the Silverback manual.
18. Hop-up adjustment: Turn the wheel clockwise to increase hop effect or counterclockwise to decrease it.

✅ Ready to play!

About Stalker

After the success of the SRS Kraken hop-up, Stalker decided to also develop a hop-up chamber for the Silverback TAC-41.

This design is another creation by Stalker, who, as a certified gunsmith, airsoft player, and fan of the Silverback line, develops products that are easy to install, easy to adjust, and highly effective on the field.