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Airsoft Systems ASHU Hopup Unit for M4 / M16 Series Airsoft AEG Rifles
by Carl V. Date Added: July 10, 2014
Interesting concept. I'll give it that.

However, this hop up unit is off spec and causes feeding and jamming issues. I had my tech put this into my VFC 416 and bbs will occasionally feed into the chamber. It was extremely inconsistent.

I tried using multiple mags to make sure that the problem wasn't mag compatibility. I had magpul Emags mids, King Arms mids, KWA mids, and high caps with the the brand I'm not sure off.

Since the bbs were inconsistent with loading, this caused problems with the ASCU unit that it was attached to. My gun would dry fire a couple of times with the mag loaded in and then not fire at all until you press the bolt catch. I ended up disabling the feature because of how annoying that got.

I've come to conclude that this chamber is off spec and not worth wasting your time with.

Rating: 1 of 5 Stars! [1 of 5 Stars!]
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