Hey guys i just bought a rap4 t68 rifle from some guy. The rifle has a buttstock that has a quick attach remote line but when i attached the remote line with my airtank to the marker i could hear and feel air coming through the part that attached the buttstock to the gun, so like between the actual gun itself and the buttstock, and it does not have to do with the remote coil or the quick attach part. CAN SOMEONE HELP PLEASE!!