As far as I understand, the Akinci Drone’s maximum pay load weight is restricted to 1500kg and its MTOW is limited to 6000kg due to its structural design and it’s construction.
Akinci-A with 2 x 450HP engines,
Akinci-B with 2 x 750HP engines and
Akinci-C with 2 x 850HP engines
all have the same MTOW and 1500kg max payload capacities.
Differences lie between each model, in how quickly it can go up and how fast it can go and how high it can fly.
So, 2 x 570kg - 600kg TRG300 or 1 x 900kg IHA300-ER missile load is the limit.
Loading it with as many IHA-122 as we can and using it as an anti unmanned drone, UAV and USV shooter is a good idea.
However using it for shooting any other sea or land target with an effective range of approximately 55km for IHA-122, would put it in the targeting range of both naval and land based AD systems.
Really, Baykar should improve the structure of the Akinci to accommodate heavier payloads.
MQ-9 Reaper has a single 900HP turboprop engine and :
MQ9-A version can handle 1740kg of payload.
MQ9-B Skyguardian version can manage 2720kg.