02-18 is the part number for the X7/A5 Push Pin without a spring. The pin without the spring is no longer available separately. If you order this, you will receive the 02-PIN with the spring included.
02-18 without the spring is listed on the parts diagrams, so it is listed here too.
Push Pin - No Spring - Short on the Tippmann A-5 Basic Diagram v2 2009-08-06Push Pin - No Spring - Short on the Tippmann C3 Diagram
Push Pin - No Spring - Short on the Tippmann X7 Photographic Large Diagram
Push Pin - No Spring - Short on the Tippmann X7 E-Grip Diagram 2007-11-26
Push Pin - No Spring - Short on the Tippmann X7 RT Diagram