BudsGunShop.com - compatible with smith and wesson mp-15 sport two

Kevin, yes Sir it is universal. Since it is a ProMag, it may be hit or miss with reliability. The Magpul 40rd is surely a hit when it comes to reliability (out of stock at Buds currently): budsgunshop.com/product_info.php/products_id/714007715/magpul+pmag+m3+223rem+40rd+blk -------------- But can be found here : https://gun.deals/search/apachesolr_search/873750009698

Kevin, Yes this magazine fits all AR 15 platforms, but stay clear of these.

Hi,
This magazine will pretty much work on all AR15 in 5.56. That being said, ProMag (The maker of Rollermag) has mixed reputation for quality of their magazine. I recommend looking at other option such as magpul instead. I hope this helps.