OOPS! You removed what from that stock delrin bolt.....the bolt pin? Now you're searching all over the place for the detent and spring you didn't know would pop out? Look no further, SPPS has all the Spyder parts you're looking for. This kit includes (1) ball detent and (1) detent spring for the stock VS/RS marker delrin bolt at one convenient price. You might just pick up 2 kits just in case.