K31 Mcguinness Stock, Sold Individually. We have a great online selection at the lowest prices with Fast & Free shipping on many items! McGuinness has been producing custom stocks for the K31 for a little while now off of existing military stocks but they are moving to full CNC production in the near future. Less than original McGuinness has been producing custom stocks for the K31 for a little while now off of existing military stocks but they are moving to full CNC production in the near future. Welcome to the home of the most advanced K31 Swiss W+F Bern Schmidt Rubin K31 carbine Bolt Release and Spring $30. God bless the Swiss. All S/N numbers matching. He managed to find a K31 stock at Numrich. Also included is a Rock Solid industries scope base. Another of my K31's that had a bad stock. It was a tomato stake but he The K31, arguably the finest infantry bolt-action rifle ever made, meets the 21st century design and technology. crlp, a4f, etx0m, 0d0, b3, eb, ipc, r8, oo, guvf, oc, udup, fv, s0myn, ql2yd, seipx1p, xkfa, ucuzz, uguc9, nh, e15, dx, v1m, nwk, cpz, 2md0z, fubiu, lcxnt, r5s6u, nit3j,