I'm looking to buy or trad for the version of the B&T MP5K (BT-20151) or MP5 (BT-20155) folding stock without the retention notched area on the right rear of the stock. I'm looking for the smooth right rear buttplate style stock like pictured. I have a new in package B&T MP5K (BT-20151) with the retention notch I'd trade for either model longs as it has the smooth right rear buttplate. If you have one of these and would like to sell or trade please contact me walterf.adams@gmail.com