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L96 Upgrade Problems!

4704 Views 31 Replies 6 Participants Last post by  luke213
Hey guys,

Upgrading my UTG L96 APS-2 has run into a problem: my Angel Custom hop-up unit (which is the exact same as the PDI unit) is causing the gun to totally misfire. The only thing I did not replace is the bucking. When I install the nub and try to fire, I get a dead, flat sound and the BB stays in the gun. I posted a YouTube video to demonstrate the exact problem here:
Without the nub and arms, the gun fires just fine, so I know the bolt system and trigger are all working.

I know lots of people are going to tell me to scrap the AC hop-up unit even though it looks the same as PDI, but there should be a profile difference looking down the barrel with the nub and without it, especially with the gun misfiring. I checked and I can't see any difference. Any suggestions are welcome as I am at a loss for what to do.
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Well what Bb weight are you using, and what FPS is it shooting (I know these are new by questions)? It may have to do with the Angle Custom parts (hop up unit) because their barrels aren't bad.

Edit: My friends SD97 I now own use to not be able to hop .3's stock. They would have this wierrd 1/2 hop an get like 150 foot range. Maybe you need to apply more hop to be applied thus allowing you to get your full projectile range.
Like is said it might be because you can't apply ENOUGH ho.p You may want to try to put a spacer in between the your hop arm and the piece that pushes on the arm.
When I can't find a problem, I put the gun back together with all it's stock parts and test shoot it. The problem should stop unless one of the parts you didn't replace is broken. After that you can put in each piece one by one and test fire. This will help you find your problem by the process of elimination.
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