No. Michael (from my squad) had them and they misfeed with 0.25g or above, jam, feel like trash and look glossy.
We tried them in his KWA M4 first, then my G&G TR4-18, then my friends VFC Scar-L, then finally an M249 MK2 just to see annnnd the same old jamming, misfeeding, not pushing BBC's into the hop and being crap.