Without having ammo during the gun or inside the place…operate by some basic safety checks. Better still…get it checked out by an experienced gunsmith in advance of capturing for real. A little grittiness is ok since it’s a whole new build and items will get smoothed out with use. But https://bookmarkingdepot.com/story18568914/helping-the-others-realize-the-advantages-of-glock-43-p80