9C1

The Star green label Pmags fit and feed perfectly in mine. G&G mids fit and feed fine. G&G highcaps fit and feed fine. KWA hicaps won't lock into place without a serious wack. MAG 190rd metal midcaps fit fine, however as with most guns, they double and triple feed unless broken in a lubed properly.

Nice review.

Thank you! Exactly what I needed to know. The batteries I have are about 20mm thick, so they should work.

Hey guys. New member here, however I've lurked here awhile. I've got a line on a BNIB Magpul ACR Masada in FDE for pretty cheap. Ive read the entire thread and am confident in buying the AEG, however one thing I haven't seen answered is the space available for a battery in the standard polymer handguard. Would it be possible for one of you guys who has one handy to post the accurate size of the battery compartment in metric sizes? Specifically the maximum thickness of a battery which will fit. I'de really like to know if the batteries I have now will fit. I'de really appreciate it! Tha