Unleash the Ultimate Power
The Cobra System ADDER is already a fan favorite. We pushed it further with the 180 lbs kit,
but now, the evolution is here.- Smaller size, less effort, bigger power.
The all-new “ADDER TX UPGRADE KIT" provides peak performance for your ADDER.
but now, the evolution is here.- Smaller size, less effort, bigger power.
The all-new “ADDER TX UPGRADE KIT" provides peak performance for your ADDER.
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6.85-INCH｜44% NARROWER
Ultra-Compact ManeuverabilityNavigate tight spaces with ease. ADDER TX UPGRADE KIT reduces your cocked width from 15.5" to an incredibly slim 6.85". It’s narrower, faster, and more mobile. -
300FPS｜25% INCREASE
Less Effort. More PowerfulCompared to the 240 FPS of the original 130 lbs recurve limbs, the new ADDER TX compound cam system hits 300 FPS at the same draw weight.
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Classic Underlever System
Inherits the iconic R9/RX underlever cocking system for smooth, low-effort cocking at 130 lbs draw weight. -
Let-Off Technology
The compound cam design significantly reduces trigger tension while cocked, extending component lifespan and ensuring a remarkably smooth pull. -
99-130 LBS ADJUSTABLE
The integrated knob provides stepless adjustment from 99 to 130 lbs, offering unparalleled versatility for all shooter levels.
Performance Comparison of Adder Series
| Crossbow |
Cobra System RX Adder |
Cobra System Rx Adder 2.0 Upgrade Kit |
Cobra System ADDER TX Upgrade Kit |
|---|---|---|---|
 |
 |
 |
|
| Limb | Recurve limb | Recurve limb | Compound limb |
| Draw Weight | 130 LBS | 180 LBS | 130 LBS |
| Speed | 240 FPS (205 gn) | 280 FPS (205 gn) | 300 FPS (205 gn) |
| Cocked | 15.5" | 15.5" | 6.85" |
| Uncocked | 18.5" | 18.5" | 10.5" |
| Power Stroke | 7.5" | 7.5" | 8.25" |
| KE | 22.23ft-lbs | 35.70ft-lbs｜48.40 Joules | 40.98ft-lbs｜55.56 Joules |
| Mass Weight | 5.2lbs | 5.85lbs | 8lbs |
INSTRUCTIONS