The B&C ADL stock takes a ton of work to fit properly. I have installed several and really like them, but it will take a lot of fitting. I really don’t know how they sell this stock as anything but a gunsmith product, it absolutely will not be a drop in fit. In fact, stockys stocks online stopped selling this stock because they had so many returned (this is before they essentially stopped selling B&C altogether).
1. If you have a standard sporter barrel (which is what comes on the ADL and SPS), you will have to open up the barrel channel a ton. You will have to open it so much that you will also need to trim the front swivel stud shorter or it will be touching the barrel. If you don’t open the barrel channel then the barrel will be hitting the stock so hard that the front of the action will not be in contact with the bedding block.
2. One of the most annoying things about this particular model is that the front action screw block and escutcheon are not perpendicular to the barrel. In most cases the front screw will be 10 degrees or more off perpendicular, and sometimes won’t even go into the hole on the action. You have to drive out the escutcheon and mill the block underneath square so the screw is perpendicular.
3. The bolt handle always hits the stock, messing with the action timing unless you clearance the bolt.
Unless you want to do those things, convert to a BDL and pick one of their BDL stocks. They are much, much closer to being drop in fit.
I can post some photos later if it’s helpful. I’ve got 2 of these on rifles at the moment.