What is this?

I was scrolling through the NMW page and I found this.

I know it isn't based off of my writeup because that was just released very recently, but I think this was based off of my first version. I mean look at this thing. It has the 1.25" plunger tube with a 1" priming tube. I did post my first version 6-7 months ago and I posted the video on it 6 months ago. Both of these things were very in depth and they explained the mechanism in detail. I feel like this guy must have based it off of my design. I just got really excited when I saw this because I've wanted someone to build my simplified version of MIG's design for so long. What do you think about this? Do you think the guy designed this all by himself or do you think he saw my video and post and based it off of that?

Update:
I talked to the guy who made this and he said he hadn't seen my design. I think it's pretty cool that we both thought of the same concept even though mine was half a year ago. I like how people are starting to branch out on homemades and they are making more unique ones.

3d Printed Barrel Holder

Here's a quick post. As you know, I got a 3d printer. So far I have just been printing things that other people have designed. After making the writeup for my bullpup, I realized that it really needed a barrel holder. I took it upon myself to design a barrel holder for it. 

I'm not very good with 3d design software, so I decided to start off with something simple like this. I think it turned out very well and it improves the blaster by a lot. The barrel is now very stable and I can now shoot more accurately. Not only that, but I don't have to constantly adjust the barrel. I just have it friction fitted on right now and it works perfectly.

I printed it at 300 micron resolution with 10% infill. Because of the low resolution, I had to sand the inside a little bit. After minimal sanding I got it to fit. For my first 3d designed part, I am very happy with how it turned out.

Writeup posted!

My writeup for my bullpup homemade is posted below my 3d printer post. I kept saving it as a draft and that is why it is behind. Sorry for taking so long with it. I hope to be able to get the writeup on NerfHaven for the contest too.