ADDER TX UPGRADE KIT-EK ARCHERY｜Premium Crossbows & Bows

FEATURES

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.

6.85-INCH｜44% NARROWER
Ultra-Compact Maneuverability

Navigate 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 Powerful

Compared 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.

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.

SPECS / PACKAGE

ADDER TX UPGRADE KIT

Speed (FPS)

300

Draw Weight (LBS)

130

Power Stroke

8.25"

Width (COCKED)

6.85"

Width (UNCOCKED)

10.5"

Mass Weight (Front end Only)

3.6kg (8 lbs)

6.85-INCH｜44% NARROWER

300FPS｜25% INCREASE

ADDER TX Heavy Bolt(240gn)

99-130 LBS ADJUSTABLE

Let-Off Technology

Classic Underlever System

KINETIC ENERGY

40.98 FT-LBS / 55.56 JOULES

SETUP & DRILL

2 Levels of Modular Adaptability. Pick your setup, hit the drills, and master every shot.

COMPETITION
TACTICAL

⚡ Draw Weight130Lbs

🚀 Speed 300FPS

🎯 Range5-30m

⚖️ Bolt Weight240 gr

1 Minute Drill: COMPETITION LEVEL

1 Minute Drill

Target Setup

10–20m: 1 targets｜20–30m: 3 targets｜30m: 3 targets

Mission：10-30M

Perform dynamic shooting while moving laterally along the firing line. Utilize 130lbs draw weight to engage and shatter 7 targets placed within the 10–30m zone within 60 seconds.

Skill Focus

Under Lever System

Master the mechanical advantage of the Under Lever System to efficiently cycle the 130 lbs draw weight while on the move. Practice maintaining your flow to ensure accurate shots.

Rapid Red Dot Acquisition

After cocking, quickly find the next target through your red dot. Keep your sight steady and move smoothly between targets, even while walking.

Essential Safety Guidelines

OPERATION SAFETY

Always treat the crossbow or bow as loaded and keep it pointed in a safe direction. Keep your finger off the trigger until you are sure of your target and what is beyond it.

RANGE SAFETY

Ensure a reliable backstop to prevent over-penetration, and keep the surrounding area free of hard surfaces to avoid bolts shattering or deflecting.

Required Gear Setup

Standard

ADDER TX 130lbs Compound Limbs

Powerful compound design for high kinetic energy and rapid cycling speed.

Standard

Red Dot Sight

Optimized for rapid target acquisition and intuitive "both-eyes-open" shooting.

Standard

ADDER TX Heavy Bolt

Heavy-duty bolts (240gr) designed for maximum stability and terminal impact.

Add-on Required

EK Targets Bag

High-density layered foam built to withstand frequent, heavy-impact drills.

Learn More >

⚡ Draw Weight130Lbs

🚀 Speed 300FPS

🎯 Range5-50m

⚖️ Bolt Weight240 gr

1 Minute Drill: TACTICAL LEVEL

1 Minute Drill

Target Setup

30–40m: 3 targets｜40–50m: 4 targets

Mission：30-50M

From the firing line, demonstrate long-range precision. Within 60 seconds, utilize its high-velocity 300 FPS power to accurately engage 7 targets placed between 30 and 50 meters.

Skill Focus

Breathing Control Stability

Master the rhythm of controlled breathing while aiming at long distances. Combine this with a smooth and steady trigger pull to minimize movement and ensure maximum accuracy.

4x32 Scope & Ballistic Compensation

Learn to utilize the reticle markings to adjust for bullet drop (ballistic compensation) when engaging targets at varying distances from 30m to 50m.

Essential Safety Guidelines

OPERATION SAFETY

Always treat the crossbow or bow as loaded and keep it pointed in a safe direction. Keep your finger off the trigger until you are sure of your target and what is beyond it.

RANGE SAFETY

Ensure a reliable backstop to prevent over-penetration, and keep the surrounding area free of hard surfaces to avoid bolts shattering or deflecting.

Standard

ADDER TX 130lbs Compound Limbs

Powerful compound design for high kinetic energy and rapid cycling speed.

Add-on Required

4x32 Red / Blue Scope

Item Code: B10057

Crystal clear 4x magnification for precision aiming beyond 30 meters.

Learn more >

Standard

ADDER TX Heavy Bolt

Heavy-duty bolts (240gr) designed for maximum stability and terminal impact.

Add-on Required

EK Targets Bag

High-density layered foam built to withstand frequent, heavy-impact drills.

Learn more >

PACKAGE INCLUDES

- 1 x 130lbs Front End
- 1 x Trigger Mechanism Set
- 10 x 7.5" White Vanes Heavy Carbon Bolts (240gn)

INSTRUCTIONS

Product User & Safety Manual

Includes full instructions and safety information

EN MANUAL DE MANUAL FR MANUAL

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	26.23ft-lbs｜35.56 Joules	35.70ft-lbs｜48.40 Joules	40.98ft-lbs｜55.56 Joules
Mass Weight	5.2lbs (Bow Only)	5.85lbs (Bow Only)	8lbs (Bow Only)