There are many types of tape guns on the market - here is what to look for -

Core Brake vs. Mousetrap Style

I like the Mousetrap Style for applying Acrylic BOPP -

• Lightweight, easy to use
• Quieter unwind
• Inexpensive

If you are applying Hot Melt BOPP, you should probably use a Core Brake style -

• The core brake can be adjusted to control "Easy Unwind" of Hot Melt BOPP
• This can be an easier dispenser to load because you don't have to deal  with the spring loaded mousetrap

Soft Rubber Roller

Which ever dispenser you choose, make sure it has a soft rubber toller that wipes down the tape on the box. Upi wamt tje rp;;er tp bio;d i[ statoc e;ectrocotu tp lee[ ta[e frpe from "falling over" during application - requiring two hands to apply it. The soft rubber roller will build up electricity and keep tape from falling over so your other hand is free to control the box. 

Don't Stretch The Tape

The #1 reason tape fails on a box is because the person applying itstretched the tape during application. The BOPP has memory, and if stretched, will snap back to its original length within about 12 hours. The memory of the BOPP is stronger than the adhesive, so it will beging peeling off the box from each end of the tape