Matrix CNC Machined Aluminum Rotary Hop-Up Unit for M4 Series Airsoft AEGs by SHS

"Need hop up arm photo, because I'm sure its not "prowin" type

"I have been using this hopup for about a week now, paired with a Baton Ryusoku Flat Hopup Bucking (some light modification required), and I am very pleased with the performance. This was installed in my DMR that I have been using and the accuracy and range was a night and day difference compared to the previous hopup unit I was using. I will definitely be buying another one to install in my other aeg.

"Swapped out my g&g hop up for this and it did wonders for me. This is an amazing product! I highly recommend this hop up unit. I got lucky and mine came assembled all I had to do was put my barrel on it and it fit in my predator no problem. If you are looking into upgrading your hop up unit this is one of the best you can buy.

"Worth every penny, i highly recommend this hopup.

"I bought this hop up to upgrade my JG m16a3 and it defiantly made the range and accuracy better. Just like any other hop up it doesn't come with a Manuel to assemble it so just find a video on YouTube.
Pros
Easy to install
Nice color
Works very good
There are no cons to this hop up

"I bought this for my echo 1 stag-15 when my other hop up unit crapped out on me. This thing is worth every penny.

Pros:
Durable strong material (doesn't feel like it will break on you)
Good hop up bucking that works nicely.
Good hop up nub that works awesome. (used it over my h nub and I like it better)
Looks cool
Easy to install
Comes in a nice little package well sealed.

Cons: none

"Nice unit. Seems well built, but had feeding issues. A little touch up with a dremel and its working great. The hop up arm on this is not compatible with some nubs since it has the nub built in as part of the arm. So if you are hoping to add a nub to this (flat hop nub for example), you'd need to modify the hop up arm.

"Haven't actually used this yet because it wouldnt seal right in my gun but it seems to be very good quality. The one i got was blue and looked a lot like a prowin. An important not is that it has a flat hop up arm and no spacer so make sure you use this with something that has a square hop up window. The bucking it comes with isn't that great so i would recommend a different bucking. I might try it with a tru hop bucking.

"So I just got this today for a friends gun, and almost instantly got feeding issues. This was due to metal burrs inside the chamber that where preventing the bbs from going into the bucking. After some quick grinding this wasnt a problem. Overall it's a decent enough copy 9f the prowin hopup chamber, just a shame about the manufacturing issues out of the box.

"Seems like a nice hop up, but when I dropped it in, i discovered that the feeding tube wasn’t even big enough to feed bbs through. Basically unusable

"Trash, I bought this to fix my M4 but the lip of the feeding tube is too small, bb's don't even fit through it properly. Now I have to dremil it to make the lip smaller.