I love all of my handguns for various reasons and I guess that’s because I’ve learned to appreciate each aspect of them and the genius of the designs. Once you achieve a certain level of experience you become to know that so much of guns and gear is about the job at hand and personal preference. When arguments break out in our showroom its not about leather vs. kydex, but it’s about the levels of retention, Safariland holsters and Blackhawk seem to go together, but many like one over the other. Much internet traffic has been generated about the USMC adopting the Blackhawk Serpa and how the guns can get jammed up in the holsters and not release.
The Blackhawk CQC holsters are a marketed as concealment holsters too but many will find a holster like this hard to conceal except in the winter months, Blackhawk holsters like the Serpa in many peoples opinion, especially the Military is a fine duty holster. There will always be a need for IWB gun holsters and Don Hume holsters and Galco holsters are still our biggest concealed carry gun holsters. IWB is probable the most practical although pocket carry is becoming very popular. Pocket carry is still very much a white collar CCW and not really the best option for self defense. Practice and situational awareness come before modes of CCW, but IWB will always be a more reliable way of carrying a firearm.
There are enormous numbers of things you can do to customize your AR15 style rifles but one thing to consider is every time you do a gunsmithing job to your firearm, that’s one more thing that may not be installed correctly. The more you add on, the more can fall off, that goes from changing magazine releases, trigger guards, triggers, hand guards, gun grips and and more. Instead of taking everything off of your firearm, it’s really better to just get another upper receiver or another firearm. Especially if you think there is a chance you won’t like the modifications. Piston conversions are another thing to be careful about because the gun should be functioning reliable after the changes and not less reliable. And remember don’t fix something that isn’t broken.
Going back and forth from a direct impingement firearm to a pistol driven gun and then back to DI is a bad idea. There are some really cost effective versions of the piston uppers like the CMMG uppers for sale at Rogue Elite. LWRC is still the king of the piston driver uppers especially after the new lightweight upper receivers have come out that are just slightly over $1000. The M4 LEPII is a popular upper receiver and only change of your recoil spring should do the trick. The key to maintaining a reliable firearm is to maintain it, not constantly mess around with it. If you want to do minor changes, go ahead, major changes to a firearm, get a new one. The cost in time and money may be about the same.