I changed out the tapered barrel that was on the rifle to a MDL12 .223 heavy barrel. I wanted to add an accustock so I checked with savage as to what I needed. I had to swap out the barrel lug when I put the new barrel on and I had to add the bottom "metal" . My mdl11 had the one piece tupperware stock and the mags have the clip as part of mag. (new style) so I needed the part that holds the mag in. Most people say its the part 106705 for $78 but it is not. The part is "frame,short,Syn,Matt(DBM) item code 109400. Number listed on part is 108655. Price is $14 . Much cheaper and made me happy after spending $150 on the stock.