It's an LMT two stage (from my MWS) with a set of Geissele G2S pins and springs. I think the next set of pins is going to be KNS.... It's a little pornstar~ish these days in the pin-to-hole-fit department
It's getto fabulous, but it works like a damn charm!
That gun is actually the one that I took to the armorer's course. That gun has been beat up and tossed around more times than Rihanna, Whitney, and Tina combined! It keeps right on truckin, though.
[mini-rant]
I don't know why certain folks on the internet seem to think that there's some magic sauce that comes with assembling your own AR. (I see the word 'build' a lot, and that bothers me. Unless you started with a chunk of raw metal, then you didn't build anything!!!) I love em. I've built maybe 2 every month since I've been here. Most of them have been for other people just wanting to say they've got a 'custom' AR. However, it's EXACTLY what they want. I sit down, discuss their intended use, and then WE come up with a parts list and they order it. When they show up to my house with all the parts, then they watch me assemble it. They pay me in the neighborhood of $20 or so to help them out with this. Sometimes they just give me a sincere 'Thank-You'. That's all that I would ask for. Anyways....
So, I see these videos where folks attempt to destroy a factory built gun. They use everything from rapid-firing 200 rounds all the way up to explosives. The guns just keep on ticking. If lower receiver 'X' is made of 7075 aluminum, then why would it be any more or less durable than ANY other lower that's made out of the same material? I look for what the raw materials are made out of rather than a roll mark on the side of the gun. I guess the real money is going towards the fit and finish.
That being said, I don't plan on ever purposely conducting a torture test on any of my guns. I've kinda tossed them semi-haphazardly into the back of the car, ran around on the range with them, used a couple in some classes, and I have yet to have a hiccup with any of them.
For what the average American would require out of an AR, you can build one and have a much deeper understanding of how they function, and hopefully a better appreciation for it's care and use.
[/rant]