30 Cal. Bullet Cartridge clip pens replicates the an actual 30 Cal. shell.  These pens use Parker style refills. 
30 Cal. resins in gray tones with chrome accents creates this handy Click pen.
30 Cal. Bullet Cartridge Click pen in gold with orange/rust/cream swirls. 
30 Cal. Twist pen with chrome and black/gray camo.