These are new, oem rear bolts directly from Tippmann. These are the same original bolts used to assemble new guns. Please be aware that they are NOT machined to a mirror finish. Their bodies may appear imperfect but they're perfect where it counts. The rear bolts hold the rear bolt oring in a groove near the front. They have a hole for the linkage arm which connects to the front bolt to keep them moving in tandem. Their most critical function is the sear catch on the bottom where the sear catches the bolt and holds it back after each shot to be ready for the next pull of the trigger.
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.
Tech Note:
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). It's a running change in the design and inventory. The difference is that the new bolt takes an insert just like the Custom Pro rear bolts. The number for the new A-5 Rear Bolt Insert (sold separately) is TA01010. The older style rear bolts without an insert are no longer available. If you're replacing the old style and upgrading to the new bolt you'll need to get the new rear insert also.
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'
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Corroded, mottled and pitted exterior surface and rusty interior - Such disappointment!
I think I'll use the one I was going to replace.
Thank you for bringing this to our attention. We apologize for the condition of the rear bolt you received. We take pride in providing high-quality parts and are disappointed to hear about your experience. I'm going to have a replacement sent out to you right away. I checked our other stock and the rest of them look fine so I'm not sure why the condition of what you got was so poor, or why it was not caught during packing. But, we'll get you taken care of and again, I'm really sorry for the inconvenience.
-Galen @ TippmannParts