This automatic MIT inflatable re-arm kit contains everything necessary to re-arm your MD2012. Use only Mustang Survival re-arm kits. Use of other re-arm kits may result in improper operation or failure to operate and will void the product's warranty. 
Re-arm kit contains:
        
          Re-arm kit contains:
- One 20 gram CO2 Cylinder
 - One ready status indicator pin
 - One bobbin