Quick question! Help!
 

Hey I am planning on using my friends as target practice this weekend and I have a problem!

My hop-up unit is toast!

So, my question is will this fit in my KingArms Colt M4A1 without any problems?

http://www.airsoftparts.ca/store2/in...oducts_id=1582

(Madbull Ultimate Hop-Up M4/M16)

Thanks! Any input about this item is appreciated!

Nobody knows eh?

I'm no expert, however, my friend has an KA colt m4, and recently changed his hop up and he used a madbull. It went in perfectly, I belive the KA is TM compatalbe. So most aftermarked TM parts (or clone) will work. On the other side, I have read that alot of people have to do light custom work to the hop up or where it fits to make a good fit.

I have one of these units and have tried it in about half a dozen AEGs and I've never quite been happy with it. I've seen some reports that these sometimes require a tiny bit of modification (with a Dremel tool) before they feed properly. My unit has that problem and I haven't gotten around to widening the bucking chamber / loading chamber edge yet. Some people have no issues so it seems to depend on batch.

If you are buying a hopup unit from Airsoft Parts, personally, I highly recommend the Modify Accurate Hopup unit instead. I personally run 4 of these with great success, and my teammates run an additional 2 or 3 of these as well. Excellent performance and fitment all around.

If you are shopping for a good bucking to go with it, grab the Madbull red shark bucking. Fitment is good and the one airsoftparts sells comes in a pack of two.

I have that exact chamber. Haven't tested it just yet but I found that the blue bucking was slightly long and I couldn't get the "C-clip" in. Basically I had to take a hobby knife and carefully cut part of the bucking off so I could mount the "C clip".

Data point: I had to do the same thing.

By the way, if you haven't tested it yet, I recommend dropping a BB into the unit and checking to see if it takes a lot of force to push the BB through the bucking lips. On any bucking I try with this unit, the required force is very high. I'm wondering if you might have similar or dissimilar results. I still haven't had time to take a Dremel to mine, but heard on ASM that that solution can work.