you cant tell from looking at it you have to measure it anywho kyle search the forums next time before making a new topic and you should find different materials and pipe sizes people have used for paintballs by searching.
search the forums for pete sake!people use copper,metal,aluminium,pvc,cpvc they all come in different sizes so search google to find out whats the ID of say 3/4" copper ,PBs are 0.68"
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