Professional Airgun Regulator Parts & Kits. Lane Professional Airgun Regulator Parts & Kits. Lane Regulators. "Air Arms Air Rifles, Air Reservoir / Cylinder Filler Nut / Tool". The tool is steel with replaceable 3mm Dowel Pins, You can then clamp the 'Filler Nut Tool' in a vice or use a large spanner / adjustable spanner etc. and unscrew the end of the reservoir.
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