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Madbull Airsoft Ultimate Hopup Unit for M4/M16 Series Airsoft AEG
by Nicholas S. Date Added: May 24, 2013
This Hop-up unit came with my madbull metal body and I am loving it. I purchased an Echo 1 troy which out of the box was claimed to have 400 fps. After my local indoor field chronoed it, it showed closer to 340 fps. so they put a m120 spring in to compensate. After pairing this hop-up with a new tight bore madbull barrel my fps sky rocketed to close to 450. I then bought a crawler barrel and replaced it to get closer to the 400 range required for indoor ranges. I plan on getting another unit for my tight bore for use out doors since it is so easy to switch out. Perfect alternative to a spring upgrade. Also my mag changes only cost me one bb so there is more shooting all around. however clearing it after each match can be a bit of a pain. Installation was easy and it came with instructions on putting it together which were a great help. Owned it for nearly 6 months and have had NO feeding issues. I easily run my mid-cap elite force mags and "made in china" mags that come with it. have yet to find a mag that wont run with this hop-up in m4 variants. Highly recommend this hop-up.

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