Red Hot to the rescue! I shot a hopper full yesterday @ full auto and can report no damage. So if there is some sort of tight fitting issue it's not bothering the aluminum power tube. I guess the real test will be after a game and 2000 rounds later. I'll post those results too.

good luck!!

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Proud Canadian Baller
Kit: A5, camo job, polished internals, 14" Smart Parts Progressive barrel. Borrowed Opsgear G36 stock. 24oz CO2 w/ remote and slide check. Neat homemade sling. MORE TO COME
Vents Goggles and Multicam

Awesome ! Glad everything worked out. Keep us updated on how everything works out.

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not that i have any clue, but maybe when you polished the internals, you took to much, now when the bolt comes in it hits the power tube side, instead of sliding inside of it, causing it to crack...

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Tippman A-5 owner= TechT Cyclone Feed Upgrade, Trinity Aluminum Cocking handle, JCS Red Hot Power Tube Version 3, 14 Freak Jr. All American
WGP Autococker Tactical owner

Plans for A-5- Changes Daily

already suggested but still not very likely.. I think the real culprit is a mis-shapped or out of tolerance hammer.

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or connecting rod, maybe too short causing the hammer to go too far into the tube? but then that would result in cocking issues.....

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quality only hurts once

So far so good! I shot 2900 rounds at full auto last Sunday and the Red Hot was unscathed. Still don't know what was cracking the plastic ones, but I'm not worried, unless somehow the aluminum one cracks too!