I've been on this board for a while. I do not recall anyone installing a Samson rail on a 15-Sport. I almost did. I know it's not a 15-Sport, but Jenna Reeves(?) a.k.a. YouTube's MissBattleborn installed one on her AR-15 and documented the process.
evolution rail will fit.
I didn't remove the gas block from the barrel to cut it down. I masked and taped the upper and carefully cut and ground the front sight. I cut the delta ring off as shown in the video. Took my time so no damage.
I love the new Daniel Defense modular....very light. Not crazy about the traditional quadrail....too much real estate IMO. I'm changing out the bulky UTG rail on my T for this below.