Unobtanium, I wouldn't go more than 15 degree for the Shield, 10 degree would probably be optimal. No, it will not retain the pistol if you get the TLR6 and want to use it without the light. The guard is the portion between you and the gun above the belt line, get the full is your unsure as I can trim that down to anything you like, but if you get a mid or none and want more guard I can't add material. Select wide hole pattern if you are using pull the dot loops exclusively. If you want to be able to use the clip, split loop, or pull the dot loops, choose normal hole pattern. Thanks and you can also email me (below) with any questions.