CVA 209 Hex Head Shotgun Primer Replacement Breech Plug for Optima, Kodiak, and Wolf Series Rifles. Accepts standard #209 Shotshell Primers. Ideal for shooting pyrodex pellets Replacement breech plugs are the same reliable designs and quality that come standard with all CVA rifles This Breech plug is only for Pivot-Action and Break-Actions made in *2009 and before, these models would include: Optima, Optima Pro, Wolf, Kodiak, and Kodiak Pro The last to numbers of your serial number indicate the year your model was made. Example 61-13-??????-01 this model was made in 2001.