Ek Archery Adder TX Compound Upgrade Kit

The Adder TX Upgrade Kit is designed to transform the standard Cobra System Adder into a more compact and efficient compound setup. It replaces the traditional recurve limbs with a compound cam system, delivering improved performance without increasing the effort required to operate the crossbow.

The compound design produces a noticeable increase in bolt speed, reaching around 300 FPS with 205 grain bolts, while maintaining a 130 lbs draw weight. At the same time, the cocked width is reduced significantly, creating a much slimmer front end that is easier to handle and better suited to tighter environments.

An adjustable limb system allows the draw weight to be fine tuned between roughly 99 and 130 lbs, giving flexibility depending on user preference. The compound cam system also introduces a let off effect, reducing strain while cocked and improving trigger feel for a smoother release.

This upgrade keeps the familiar underlever cocking system, so operation remains straightforward while benefiting from increased efficiency and a longer power stroke. It is aimed at users who want more speed and a more compact setup without stepping up to heavier high draw weight upgrades.

Specs and Features

• Converts Adder from recurve to compound limb system
• Approx 300 FPS with 205 grain bolts
• 130 lbs draw weight with adjustable range down to around 99 lbs
• Slim profile at approx 6.85 inches when cocked
• Increased power stroke for improved efficiency
• Approx 25 percent speed increase over standard setup
• Compound cam system with let off for smoother trigger feel
• Retains underlever cocking system
• Includes compound limb assembly
• Includes upgraded trigger mechanism
• Includes 10 heavy carbon bolts
• Designed for Cobra System Adder crossbows only