LDA = "Light Double Action" - Para Ordnance's Double-Action-Only on a 1911 format. Carried cocked & locked. The trigger pull is fairly long, but you wouldn't believe how light & smooth it is. I have a Para C7.45, which is compact or officer size. It is really a hoot to shoot and the trigger is amazing - much lighter than the DAK trigger on my P229SAS. Unfortunately, I have had reliability problems with it and will not use it for CCW. It averages about 2 feeding failures per 50 round box of WWB. I just picked up a Wilson Combat mag for it and I will try using some different types of ammo and see if that helps. It's really a shame about these problems because if it were more reliable it would make a nice CCW gun.