Castellan brand mid caps M4

[E21A]

Are they any good? Has anyone used them in a combat machine? Feed ok? 

http://www.taiwangun.com/en/aeg-mid-cap/120rd-polymer-mid-cap-magazine-for-m4-ar-15-series-black-castellan?from=listing&campaign-id=19

im trying to plan ahead and budget as i’ll Have my UKARA number soon. I’m looking for something that looks a bit different and will suit a CM16 SR series. 

Any other suggestions welcome. 

 

[DucksLovePancakes]

I have been using the other style Castellan mags for years and they are absolutely spot on! Never had any feeding problems with my Krytac or any previous guns (g&g, Ares) they are still going to this day!