Medi-Dart CrossBow Kit Complete



Shipping calculated at checkout

Available Now!

Medi-Darts are tools for giving intramuscular or subcutaneous injections to livestock without the need to restrain the animal. Medi-Dart's unique needle design holds the dart in the animal until the medication is delivered. Once the injection is complete the needle is pushed out of the animal by the patented system, giving low stress to your animals.
Due to safety of people and livestock, we do not accept returns of the Crossbow or Extension syringe.

Medi-Dart introduces the world's most advanced treatment system for large livestock in the field. The Medi-Dart Crossbow is the result of experience (since 1991, combined with customer requests and proven technology.

Producers familiar with our existing products realize fast and low stress treatment of their livestock means less medicine, maximum gains, and a quiet, easy to handle herd. The Medi-Dart Crossbow has been on the market since 1998, with very positive feedback. We feel it is a health management system that a producer cannot afford to be without.

The Medi-Dart Crossbow enables producers to accurately treat animals at a distance of 15 to 45 feet.
Notice the valve cannot open fully if the plunger is drawn back to the 10cc mark. Therefore you cannot give injections less than 10cc.

The Medi-Dart Crossbow kit comes with 2 needles. If your cattle have experienced hoof rotpink eyepneumoniaretained placenta, or worms, then the Medi-Dart Crossbow kit is a must.

Watch A Video Here:

 No chasing - No restraining Keeps the animal with the herd. Keeps the animal on feed rations.

New improvements to the kit are:

CB kits now come with 2 needles, one #5 & one #6, both IM. The crossbow kit also includes two plastic wingnuts (MDCBWN & MDEWN).  The MDCBWN has 3/8" wings and the MDEWN has 1/2" wings. 

The #6 was made because there was a need for more grip. This needle works well for doctoring yearlings or sick calves in the fall. A #6 needle needs to be paired with the half-moon pushrod (MDHPR) and a wingnut. Currently we are only selling the #6 needle in our kits and as a MDAKCBW or MDAKEW (formerly the MDAK needle/valve assembly).  It needs to work together with this pushrod & wingnut to properly eject.  

In our own R&D we have found the #5 & #6 needles, along with the MDHPR & wingnut to be very effective and are receiving lots of positive feedback from others who have used this new system..

Kit Includes:

  • Medi-Dart Crossbow, 2 complete darts (30cc), 1 practice end, 2 x IM needles (#5 and new #6), Castor oil lubricant, and Air pump


Medi-Dart uses a simple bicycle pump to create air pressure which injects the medication and upon completion of the injection pushes the ejector loop ahead, forcing the needle out of the animal.

Estimated needle usage:

If you are using needles with a crossbow …. you can get an average of 30 uses out of the needle.  

If you are using needles with an extension syringe…you can get an average of 50 uses out of the needle. 

You can resharpen needles with a file and get more use out of them.

Usage estimates are based on correct use of the needles, it excludes misses such as hitting trees.

*** You can still use the old style needles with the new Kit, but you must purchase the short connecting nut.


Medi Dart has been around for 27 years and we also have customers who are satisfied with how the tool works and so we are continuing to sell the #2,3 & 4 IM needles for them if they prefer. Some people don’t like change.  

Currently only have #5’s available in sub-q needles. 

Difference between the two sizes of new wing nuts:

MDCBWN 1/2 ” long wings we feel is better for cows and bulls that are not that fast. It provides a little extra leverage and keeps the dart up a bit more for great ejection.  

MDEWN 3/8” long wings we feel is better for younger cattle that are very fast when you shoot them. The shorter wings provide a bit less leverage and lets the dart stay in the animal better. 

Another reason for this difference is people use different drugs. Some are smaller doses, so the dart doesn't have to hang on for very long. 

Some people want to give a bigger dose so then the dart must hang on longer‎.