Wondering if anyone has any input on this. I've decided on building a 6.8 SPCII upper for my AR primarily for hunting purposes. I would like to keep costs below $600 minus optics, which I already have. I've decided on a 16" AR Performance scout barrel/bcg/gas tube combo and Joe Bob adjustable gas block for about $360. I'd like a recommendation on stripped upper w/parts kit, free float rail (UTG?), charging handle, forward grip and mags. It appears there aren't many companies making reliable mags for the 6.8. My plan down the road is to build a form 1 suppressor also. Thanks!