they can be stacked

(It can be removed for spotting scopes

Basic glass color: Gray

If you want to attach to a hardball/airsoft shooter

Ultrair Rød Gas, 570 ml Levering af Våben & Ammunition they can be stackedUltrair Red Gas is a high quality airsoft gas that is specifically designed to maintain the efficiency and precision of airsoft guns. With a capacity of 570 ml, this gas provides enough energy to power your airsoft guns for a long time. The gas here is a red gas that has an expected 175 PSI pressure, which makes it good especially in the winter or if you want a little more kick in your weapons when shooting blow back (be aware that some weapons cannot