When I field strip my Gen4 G26 to clean it, sometimes I have a problem putting it back together. I don't know what's causing it, but maybe half the time it doesn't go back together properly. I'm sure it's something I'm doing and not a mechanical flaw. Sometimes after reassembling, the slide won't come back all the way when I try to pull it back. So I pull the trigger and take it down again and retry. Sometimes it does the same thing again, but it always eventually gets back to normal after two or three tries. Any ideas on what's causing this? The only thing I know to do when this occurs is to try to adjust the recoil assembly, as sometimes it's slightly out of place after putting the pistol back together. This is my only lead so far. Anybody else's Glock doing this?