A worn sear or rear bolt will make the gun 'rapid fire' like a machine gun, but too fast to work properly. The gun may not stay cocked either. These are both caused by the rear bolt slipping off of the sear that is supposed to catch it and keep it back in the cocked position. If either your sear or rear bolt is worn, Tippmann suggests replacing both at the same time. A worn sear will wear down a rear bolt faster than normal and vice versa. Replacing only 1 of them may result in having to replace the same part again a lot sooner.

Rear Bolt - New Jan 06 on the Tippmann A-5 Basic Diagram v2 2009-08-06 - If you order this, then be aware that you'll be getting the new upgraded rear bolt. For the new bolt to work, you
Rear Bolt on the Tippmann A-5 Basic 2011 Diagram
Rear Bolt on the Tippmann A-5 RT Body Diagram v2 2009-09-04
Rear Bolt - New Jan 06 on the Tippmann X7 Photographic Large Diagram - As of January 06 the rear bolt on the A-5 has been changed. The new rear bolt has the same part number as the old rea
Rear Bolt - New Jan 06 on the Tippmann X7 E-Grip Diagram 2007-11-26 - As of January 06 the rear bolt on the A-5 has been changed. The new rear bolt has the same part number as the old rear bolt (02-11
Rear Bolt - New Jan 06 on the Tippmann X7 RT Diagram - As of January 06 the rear bolt on the A-5 has been changed. The new rear bolt has the same part number as the old rear bolt (02-11) shown below. It'