The Zip Gun/Pen Gun Primer Gun is a versatile tool designed for shot shell primers. Its compact and portable design makes it easy to carry, while its durability and reliability make it an ideal choice for outdoor enthusiasts and hunters. The gun can be modified to slightly different sizes if needed, providing you with the flexibility and adaptability you need to get the job done. With its high-quality stainless steel construction and innovative design, the Zip Gun/Pen Gun Primer Gun is a must-have for any collector or enthusiast looking for a unique and functional piece for their collection.