Knurled velocity adjuster with purple face on rear of stainless…

Rear-facing close-up of a stainless paintball marker's velocity adjuster, a knurled end cap with a purple-anodized face and center set screw, at the back of the receiver. The gun rests on speckled beige carpet with a brass fitting visible at right.

AI caption January 2010 · Photo 316 of 333