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John, yes Sir, it will fit both no issue Sir. Welcome and stay safe!
Will it fit? Yes. AR15 mags are pretty universal. But not all brands are made the same, if you buy A promag only buy one at 1st to see how well it functions ( promags have a tendency to break rather quickly) I highly recommend The Magpul P-Mag as this is the exact magazine used by the US marine Corp 10 rounders can be found here https://magpul.com/firearm-accessories/pmags/pmag10ar-m4genm3-5-56x45.html?mp_global_color=118 Lancer Brand Mags are solid too https://www.larue.com/products/lancer-l5awm-5-56-10-round-magazines/ Magazines in firearms are one the biggest causes of misfeeds and malfunctions ( the other big one is bad ammo) With high quality mags only costing a couple bucks more its highly advisable to get the higher quality ones so they'll function when you need them most
WILL FIT, but DON'T BUY bc promag roller mag has really reliability issue. I hope this helps.
yes they will fit however being promag the function will be hit or miss
