Hey gang, just wanted to post this up here for reference. I researched which Limbsaver pads work on the Magpul SGA OEM Adapter and found out that Limbsaver Model 10100 is apparently the one best suited for it, but ... I ordered the 10101 and it fits fine, down to and including the screws working. The key to getting the screws in is to put oil on and in the holes in the Limbsaver pad and the screws, then push the screws through the pad *before* you put the pad on the Adapter, then get it all lined up properly and set the pad on a hard surface and give the adapter a few whacks with a rubber mallet (the larger the better). It seats it all in place and from there, I was able to screw it on tightly. So, get the Limbsaver 10101 and you are good to go.