BCA Service Off-Spec Parts Modification and Fitment (Starting Rate)While there are design standards in airsoft, many times different manufacturers do not conform to them. This doesnt mean that your requested build cannot be completed; we can often modify the parts, your gun, or both to make everything play nice. This fee will be added whenever substantial modifications must be made in order to get everything installed and working. We do our best to advise you on whether this fee will be applied before commencing