Best Fittings Extended Quick Coupler Socket

Best Fittings Extended Quick Coupler Socket

Solve the frustration of awkward fills with the Best Fittings Extended Quick Coupler Socket—specifically engineered to connect easily to deeply recessed “Foster-type” fill nipples found on many modern air rifles.

This upgraded socket features an extended 30mm release collar, compared to just 10.5mm on standard couplers, allowing you to disconnect quickly and confidently—no additional release tool required. It’s an ideal solution for airguns with recessed fill ports, including:

• FX deep recess stocks
• Daystate and Brocock models
• Older “Swift” and “Dr Bobs” style Theoben and BSA Superten fills
• Custom air tubes with fill nipples replacing the rear pressure gauge

Compatible with a wide range of fill systems, the Extended Coupler Socket fits Best Fittings Q/C Plugs, High Pressure Fill Valves, and most standard HPA fill connectors used in airguns, paintball tanks, and airsoft equipment.

Key Features:

• 30mm extended release collar – easy to grip, no extra release tool needed
• Designed for recessed Foster-type fill nipples
• Compatible with FX, Daystate, Brocock, BSA, Theoben, and more
• Available with 1/8″ BSP male (UK standard) or 1/8″ NPT male (US standard) thread
• Max working pressure: 340 BAR / 5000 psi
• Suitable for breathing air and all pre-charged airgun systems

A must-have for any PCP airgun user dealing with awkward or deeply set fill ports—offering safe, tool-free connection and reliable high-pressure performance.