Angled to match the stock, with a bias towards the butt pad closer to the side of the case because, well, it's a butt pad. I wouldn't say it's comfortable but it's definitely possible. Probably more so if you angled it completely from corner to corner. So, FWIW this will fit a collapsed M4 and you won't have to pay extra airline fees because the 1700 is just within the limits for large bags for air travel. (62 linear inches) @bigoo7e