It's a Pmag that should say it all. I have a dedicated Sharps ar 15 with magpul furniture so this is a nice fit for my rifle. I would have given 5 stars but I had to go with 4 because there is no choice of color options and no choice of logo. My ar has the old SRC logo and the only SRC mags have the 25-44 under the logo. Also I wish I could have changed the color of the engraving to magpul foliage green. I like to be color coded lol. All in all I love my custom Sharps Ar 15