I bought an M40 years ago when they first came out. I really liked how the M40 feels in the hand and features such as the loaded chamber indicator. But my M40 had a hard, inconsistent trigger pull and even worse, was not reliable. Every 2 or 3 clips it would fail to reset the trigger and I had to cycle the slide before it would fire again. I procrastinated doing anything about it and after awhile, the original importer had gone out of business. So I took it to a local gun smith. When I got it back from the gun smith, I could not pull the slide back with out pulling the trigger. I put the gun in my safe and forgot about it for years. A few weeks ago, a local gun shop told me about SAI and gave me their number. Jeff at SAI told me to send the gun to him. He installed a new trigger system including many A1 parts and got the gun back to me in a couple of days. He did this free of charge even though the gun was years old (I can’t even remember exactly when I bought it) and another gun smith had messed it up. I fired 130 rounds through it this week end and it worked flawlessly. The trigger is now smooth and consistent. Jeff, (if you ever read this) YOU ROCK!