SignalBoost1776 from United States, MN Public Profile

15 rounds ruined my upper receiver and cracked my BCG.
It's a Toolcraft with less than 500 rounds on it. My upper receiver now has 2 huge gouges in it where the cam on the bolt interfaces with the upper.

As soon as I noticed that the smell, sound, and feel of the weapon had changed I stopped and noticed a large amount of brownish red carbon built up around my ejection port. I found pieces of primer in my chamber. Then got home and assessed the damages to my build.
The bolt carrier has a crack forming behind the gas key above the firing pin, and the upper receiver is toast.

I've used this ammo in the past and not had any problem, but this has turned out to be a costly lesson.

DO NOT CHEAP OUT ON YOUR AMMO.
I've filed a claim on their website, hopefully this will be remedied some how.

I'm writing this to let people know about my experience dealing with Grid defense/Ghost firearms, as I bought this straight from them NOT optic planet. I was really excited to get this upper, until I shot it. It looks great but the handguard does not stay on the barrel nut. It took me 2 magazines to notice it walking off. So I put lock tight on the screws and torqued them down to 50 fpsi. Went back to the range, and the handguard still walks loose. I sent it back to them to fix the issue. They send it back to me and the same issue persists. By this point it was well outside of any return window, so I decided to put green lock tight around the barrel nut. It's held up to 60 rounds put through it so far, but I'm not holding my breathe it won't walk off again as the lock tight heats up and breaks down over time.
TLDR:
My over all conclusion is that there is a major design flaw with the way they designed the barrel nut/handguard interface. It is solely held on by friction of the barrel nut and with 2 tiny rinky dink bolts that do not interface with the nut at all. I wouldn't waste my money with this. The companies customer service was somewhat responsive, but ultimately unhelpful. This is in NO WAY a reflection on Optics Planet. They had nothing to do with this.

I've never been able to test these in gel or anything so I can't speak to there abilities in a hunting or self defense application. I have however shot many of these at the range to test there function, and have never had any issues. So with that being said, I'd say that they are a good choice if you're looking for a cheaper super sonic 300 black out round that has possible self defense/hunting applications.

I got the polished silver g19 barrel.
I've only put 200 rounds through it so far, made up of a mix of 124 grain fmj, 124 +P defensive, and 124 grain hollow points. Didn't have a single issue. It's pretty flashy but I like it. I'll update if there are any issues.