Our model DS is based on the model B action and comes with the most desired features standard, these include an adjustable trigger hanger, a roller cocking piece and a dual port setup. Also the load port is a little shorter as it is designed specifically for short case lengths that allows for a faster and smother bolt cycle. This action is 7.565” long and only comes as a 1.35 round. Weight is 32.5 oz but varies if features are excluded. Load port length is 2.80 inches and barrel tenon is 1.062 x 18 tpi.