I just recently received my G17 TSD Combat Systems upper, and I have to say this is by far the most amazing pistol I've ever shot. I have relitively bad eyesight, and it makes distance shots, well really any shots that involve the front sight very very difficult. I had pretty much given up on practicing past 10 yards as my eyes just couldn't do it. This has all changed. I am able to produce 1.5 inch groups at 25 yards standing. I was also able to hit my steel target (12x8 inches) at roughly 150 yards with a 90% hit ratio. This was absolutely impossible for me before. I truly believe in 5-10 years, the majority of CCW weapons will be sporting some kind of RMR type red dot. The producers claim that it's like "Cheating" well, they're right, it is cheating - and I have no problem with it. I will take every advantage I can in a fight. Had the CCW carrier at the IHOP shooting been equipped with a red dot pistol, I bet he could have easily ended the threat with confidence. This system changes the very way I look at the defensive pistol. My confidence level has sky rocketed. My favorite part of the RMR is the training aspect - it REALLY shows the error's in your trigger pull and grip. I've already improved my trigger press. You can see every little movement. I was very uneasy about the purchase at first, as I'm a one pistol, one long gun kind of guy, who has never spent more than 600.00 on a firearm, but the moment I zero'd the RMR in and hit my target perfectly centered at 25 yards with a shoot-n-see target I knew it was worth every penny and more. I wanted to originally send my RTF slide to them to have it milled for the RMR - as it would have been cheaper then then purchasing the whole upper, I was also leary about purchasing an aftermarket slide. They claim the slide is harder steel throughout, and better all around then the OEM, wether this is true or not, it is a very high quality aftermarket slide. Either way, it has been MORE reliable than my OEM unit. I had several erratic ejections, and 1 FTF's with my OEM unit in 2,000 rounds. I was going to buy used from one of GT's members, but was in a car accident, I ended up having to spend the 1300.00 I saved on medical bills (If you're reading this, you're a good man. Thank you for understanding, I hope you found a buyer) - I was so devastated as I had been saving for months - a relative came through for me and purchased it for me - I am so grateful. It's amazing to have a good caring family. The good news is that by purchasing directly from the company, if I ever use this pistol in self defense, and my weapon goes to evidence, they will give me a loaner TSD RMR pistol until I can get mine out of evidence. Now that is pretty darn amazing. In the week that I've had it, I've put 750 rounds through it with zero malfunctions, perfect 4 o'clock ejections, and tack driver accuracy. I just wanted to share my purchase, as I can truly say this pistol is game changing, and would recommend it to anyone that wants the best of the best. I was lucky enough to receive their first batch of Melonite treated slides in Black - which I find more attractive then the current stainless steel version. Here's some pictures: My Dale Fricke Seraphim holster for RMR equipped Glock 17. These were my last two rounds of Speer Gold Dot 124G - I had two rounds left before leaving the range and decided to see how close my zero was at 25 yards (Max distance at this range) On the upper left hand corner of the target is a 4x2.5 inch miniature version of the target. With my eye sight + irons this shot would be VERY difficult for me to make, but, very easy with the RMR. This was a double tap, standing, aggressive forward isosceles position. This may be an easy shot for some of you and not impressive, but for ME, it is. I was so excited about my new toy I had to post a review. Thanks for reading, be safe out there. Edit: I forgot to mention: Every thing but the slide and barrel is stock, every internal is stock and I'm using a 4.5lb "-" glock connector. I tried using my glock barrel, but found that the TSD barrel is more accurate - I could go without the threaded barrel as it tends to dig in my leg - I will probably never own a suppressor, as I don't see the need. I'll keep it on for now though.' Also: Those with stigmatisms be warned: The dot will not be perfectly round, if I don't have my contacts/glasses I see a compact cluster of several tiny dots. As does my fiance. When I put my glasses on, it's perfectly round and crystal clear. It's completely functional without my glasses, but it gives me incentive to put my contacts in daily.