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Cobra R-Series Siege Crossbow

Original price $599.00 - Original price $599.00
Original price
$599.00 - $599.00
Current price $599.00

Looking for the Siege + Magazine Kit? Click Here

Compound crossbow with underlever quick cocking technology

The time has come - the first compound "Cobra R" goes into production!

After the incredible success of the predecessor models "R9" and "RX," the most powerful and sophisticated version of the popular underlever crossbow to date is now coming onto the market. 

With arrow velocities of up to 328 fps (100 m/s) and a projectile energy of up to 52 ft-lb (70 Joules), the "Siege" achieves unprecedented performance numbers for a tactical crossbow. 

The throwing arm is kept extremely compact, the weapon is significantly narrower than the "R9/RX". Due to the adjustability of the limbs, the draw resistance can be continuously adjusted between 115 lbs and 150 lbs. Due to the significant extension of the cocking lever and the roller-assisted throwing arm technology, the weapon is particularly easy to cock. The string can be changed quickly by unscrewing the adjustment screws by hand (without special tools), which eliminates a typical disadvantage of compound systems. 

The compound throwing arm has let-off, which means the highest resistance during tensioning is reached approximately in the middle of the tensioning movement. As a result, there is much less weight on the trigger when fully cocked. This not only protects the material, but also makes for a much smoother trigger pull. Ideal for long range shots!

The "Siege" comes with new, 15.5-inch-long special bolts, weighing approx. 277 gr (18 grams). Unlike previous models, these bolts feature three vanes, which is especially important for longer shooting distances. 

To account for the significantly greater shooting distance compared to previous models, the "Siege" is not supplied with a simple red dot sight, but with a real scope (4x magnification). We have been able to get very good hits even at 70 meters. 

The "Siege" is now a full-size crossbow, with a projectile energy that is about twice that of the "RX". Nevertheless, it is easier to cock and even more compact. It is simply the pinnacle of development in compact crossbows.

Note: Installation of the optional Magazine Kit does require some assembly. Please see the user manual below:

Scope of delivery:

  • 3 x 15.5" carbon bolts
  • 1 x quiver
  • 1 x shoulder strap
  • 1 x AR stock with buffer tube, adjustable cheek rest
  • 1 x Scope 4x32mm
  • 1 x Single foregrip
  • 1 x Bipod
  • 1 x Safety glasses
  • 1 x string wax 


    • Length: 32.75 - 36.5 inches or 83-93cm (varies due to adjustable stock)
    • Width: 12.2 inches or 31cm
    • Weight: 7.5 lbs
    • Trigger Pull weight: 2lb 10oz



    Additional Files:

     Cobra Siege User Manual


    Q: What arrows should I use?

    A: If you are shooting without the magazine, use these: Arrows for Cobra Siege

    If you are shooting WITH the magazine kit, use these: Magazine Compatible Arrows (10 Pack)


    Q: Can the new compound limbs attach to my Cobra adder? 

    A: No. Compared to the previous models, the "Siege" has been changed a lot despite the optical similarity. The arrow rail has a different design, the cocking lever has been lengthened and reinforced, the receiver for the throwing arm has also been reinforced and the string stoppers have been integrated into the body. Therefore, an upgrade of previous Cobra models with the compound throwing arm is unfortunately not possible. We ask you to refrain from such requests.