These high quality o-rings are the perfect size for fitting round the inner barrel of virtually all AEGs to hold the hop chamber snug against the gearbox shell.
Made from Nitrile Butadiene Rubber, they are chemical resistant and ideally flexible.
They make ideal replacements for the common tensioning springs as they apply a more constant, reliable pressure.
This can help reduce chamber vibration especially in high RoF builds ie. DSGs
NBR Hop Spacing O-Ring
Compatible with virtually all AEGs.
Some brands will only require a small number of spacing o-rings eg. G&G & Krytac, however some will require a larger number eg. Specna Arms