You only need the 2 action screws for this to be functional, those are included. There are multiple screws for things like sling swivel, or other mlok accessories they sell seperately. They included something like 8 screws with mlok nuts. Some of those are missing, everything you see in the box is included. The additional screws you see in pic #2 are for the buttplate spacers.
The Bravo takes AICS Mags.
Per the KRG Website: *The Tikka inlet accepts T3, T3x, and CTR versions, however slight mods may be required on the trigger-guard for the T3 TAC A1 to function properly. Tikka rifles accept AICS pattern mags with the exception of the Magpul AICS polymer mags.*All of our chassis take AICS magazines with nothing extra needed, the magazine is not included.