Here's my S&W 15 Sport. I just put the MI 2 piece free float handguards on a month ago. I really like them and they are rock solid, no movement what so ever. The scope is an old Bushnell Sportview 4-12X40 from 20 years ago. I wanted to do some 100 yard accuracy testing and it did the job just fine. I usually have a Primary Arms M3 red dot sight on it. They are the best budget ARs on the market today, bar none.
When I did my part the Sport did just great at 100 yards. These were all 3 shot groups. At 64 my shooting is not what it used to be but good enough for zombies of any type!!!!!