AKT-SP101 Archery Adjustable Cushion Plunger Precision plunger with laser markings for micro adjustability

If you’re interested in recurve archery, you need to learn about an accessory called the cushion plunger. This small item is vital to accuracy and bow tuning.
A plunger is a small cylinder that threads into your bow’s riser above the arrow rest. A plunger houses a spring, and the plunger’s tip contacts your arrow shaft. Plungers have two main functions: They set the center shot, and absorb imperfections as the arrow takes flight.
“Center shot” is an arrow’s lateral position on the bow. When setting up a bow, the archer or bow technician adjusts the plunger so it guides the arrow in line with the center of the bow. The technician then aligns the arrow by loosening the plunger’s jam nut and spinning it until the arrow shaft aligns with the center of the bow.
If you depress the plunger’s tip, you’ll notice it has a spring action, which is an essential feature. Arrows flex laterally when shot. The plunger’s small amount of give absorbs imperfections and inconsistencies in the arrow’s lateral flex, which keeps the arrow on a straight path as it leaves the bow.