I had read the forums before I got mine so the first thing I did when I got it home was completely tear it down. The whole trigger group, safety lever, grip off, firng pin out of the bolt, ect,ect. Then I closely inspected everything as I de-greased/oil every piece and part and the internal threads on the reciever with alcohol based brake cleaner then blew them all dry.
Then I locktite'd every screw, and oiled everything but the firing pin with some gun oil in the cleaning kit.
I took it out that day and started shootig on gas setting 4 but knowing lower settings will be easier on the rifle I quickly got it down to level 1. Shot 200ish rounds that day with zero malfunctions.
Then I took it home and pulled the bolt and trigger group again for fun. This is where I made a little mistake. I decided this time to oil the bolt/carrier and trigger group with some Lukas 15-40 synthetic oil. This heavy lube caused too much viscous drag on the hammer which caused almost every primer to blank (the firing pin not only needs to hit the primer hard enough to ignite it but the pin must also be carrying enough energy to support the primer during ignition or else the pressure punches disks out of the primer, back through the firing pin hole on the bolt face) filling the reciever with little disks. I confirmed oil was the cause on my next outting by cleanig the hammer pivot, switching lube, firing, pull it apart, clean, switch lube, fire, repeat over and over untill I was 110% sure it was the oil and not the rifle. Then I nerded right out and weighed the hammer, firing pin, researched what the average "lock time" in semi auto rifles was, measured my hammer spring, calculated how fast it could accelerate the rotation of the hammer, blah blah blah, nerd nerd nerd, then did some simple physics calculations (nerding) and found
that the tip of my firing pin should be exerting something in the high 50 000- 60 000 psi assuming no friction or drag. ...... Long story short too thick of oil onthe hammer slows it down too much.
So I settled on Lukas 15-40 on the bolt/carrier because it's slippery and sticky... It stays put. On the hammer I use a very very thin light oil called triflow and it smells amazing too.
I put almost 4000 rounds through it without a single cleaning or oiling and still not a single malfunction or any screw loose. I recently gave it it's 3rd cleaning and put a couple hundred more through.
Aparently some people have had massive point of impact changes aftere removing and reinstalling the barrel. In my opinion it's because these people didn't have the feel for seating the screw properly in the dimple of the barrel. I take mine off and on all the time now and I've never noticed any shift whatsoever, but I must admit I'm only shooting iron sights so there may be some but I expect very little if anything over 1/4moa.
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