Best Fittings  Best Fittings Quick Coupler Test Plug

Best Fittings Quick Coupler Test Plug

Combined Dust Plug & Cylinder Residual Pressure Test Plug. Fits BEST Fittings QC02 Socket as used on all current Daystate guns.

Compatible with Foster 12FS, 12FSS and 12MS Straight Thru Quick Snap Couplers. Essential to the keep the nasties out of your prized shooting tool, and quickly test your residual cylinder pressure by blanking the system.

To read the residual cylinder pressure, install the plug into the BEST Fittings or compatible fill connector, close the bleed valve on the cylinder and slowly open the cylinder air control valve. The pressure inside the cylinder will be indicated on the cylinder or charging head gauge. Bleed the system after use.

High Quality Stainless Steel, made in the UK.

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A delivery cost will be added to your order at checkout and is relevant for standard delivery to England, (parts of) Scotland and Wales (excluding Channel Islands) at £6.95 for 2-3 day delivery. 

PLEASE NOTE: All items deemded as a 'Firearms' or over the standard delivery weight limit (Gun Safes) may have extra charges for delivery. You must enter an RFD (registered firearms dealer) address at the checkout for all firearms orders that are not being collected in store.

Delivery costs to the Highlands and Islands are detailed at the checkout.

Please see full information here


As detailed in our Terms and Conditions you may cancel your order at any time up to the end of the seventh (7th) day from the date you received the goods. Unless the Goods are faulty (verified by us) or obviously not the goods originally ordered we reserve the right to reclaim all costs incurred by us in recovering them from you and may set such costs off against the amount to be re-credited to your debit or credit card. See more info here

Note: Currently not available for delivery to Ireland, Europe, North America, Australia and New Zealand and R.O.W..


Benefits from buying your new rifle & scope at Rifleman Firearms. One of our unique services we offer free to package purchasers, is to professionally set up your new rifle, level the scope, set up the correct eye relief and zero it on one of our ranges, so you are ready to shoot as soon as you head home. So, there’s no need to find a sheltered corner in your local field and lay down in wet grass to try and zero it - we will do that with you in controlled conditions to ensure greater accuracy and save you time, ammunition and money!
Home Delivery

UK mainland delivery from £6.95

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