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5KU CNC Aluminum Hop Up Chamber for M4/M16 Series AEG


Only gave this a 2 on the possibility it's just because it doesn't pare with my gun properly! I installed this with a tight bore, flat hop and new flat hop bucking and I lost air pressure instead of gaining any. I figured it may be because of the air nozzle to hop up seal so I purchased an actual 5ku air seal nozzle to match and it is no better or maybe even worse. It looks like the nozzle fails to fully enter the hop up chamber and create a good seal cause me to loose air pressure down threw the feeding portion.

I placed this in a echo 1 platinum so maybe it will fit other guns differently. But it did not work well at all with the vfc internals. I'm thinking it's because of the extra bulk towards the rear preventing the hop up to get close enough to the gear box which results in the air pressure loss.

Spend the money on the real deal not the clone and get the pro win. Or if you have the platinum edition echo 1 go for the modify hop up instead.
Date Added: 09/13/2014 by Jason Cox
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Disclaimer: All airsoft guns, gas blowback guns, spring guns are NOT real firearms. All airsoft guns sold to US customers are affixed with an orange tip permanently.