Tactile Turn Bolt Action
Machined pens make in Texas. Of course I only own the Ultem version. This is the full size.
Variants: Bolt action in two widths & three lengths. They also have side click pens.
Refill depending on variant: Parker-Style G2, Pilot Brand G2. Hacked Pilot-style G2 refills will fit the short pen made for Parker-style G2.