Special Ops Posted March 13, 2017 Report Share Posted March 13, 2017 From my research on the A&K STW, I'm sure it will, but I want to check from people in the know, before I order one. Will the Systema outer barrels fit on the A&K STW? I know that Systema PTW cylinders will work in this, but can one just change out the cylinder spring if they wish to reduce the high velocity of that cylinder? Since I'll most likely put a Madbull Daniel Defense MK18 9.5 rail on this PTW, I would like to know if anyone has successfully placed these rails on this PTW without any modification needed? I know they will fit on the Systema. Link to post Share on other sites
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