Lapco Cocker Breach Sizer .687 Replacement Loader Parts The M4 High Velocity Valve

The M4 High Velocity Valve is a high performance direct replacement of the stock valve

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Lapco Cocker Breach Sizer .687 Replacement Loader Parts The M4 High Velocity ValveA breech sizer is a barrel adapter created in the hey day of closed bolt markers and is made even better today because of the LAPCO commitment to constant product improvement. By installing this adapter between the Cocker threaded barrel and the Cocker threaded marker, you will prevent balls from rolling out of the barrel without losing any accuracy. This is an especially effective accessory to prevent paint roll out from pump and other closed bolt