tacwise
This is the best Manual Staple Gun I have ever used.  I got tired of the run of the mill manual staple gun.  The low tolerances in manufacturing lead to too many jams and poor performance.  This staple gun is priced right and has close tolerances so no more staple jambs or poor performance driving staples. It handles 1/4″, 5/16″ 3/8″ 1/2″ 9/16″ staples. The amount if pressure to depress the handle and fire the staple is linear, so it doesn’t get harder to press the handle as the gun gets ready to fire.

I read a post where someone said it lacked power. To that I say RTFM (Read The Frickin Manual). The switch in the side with the +/- indicator allows you to increase or decrease the pressure to drive your staple or nail.

Additionally its not just a staple gun but can handle small brads.

There is a loop on the side to attach to your tool belt, and the Handle locks in the down position for easier storage and transportation.

Tacwise Z3-140 Heavy Duty Hand Tacker/Staple Gun for 1/4, 5/16, 3/8, 1/2 and 9/16 Inches Long Staples, Silver/Orange (0806)