Its a 5.5M total award. IDIQ means Indefinite delivery Indefinite quantity. Its a contract vehicle that allows you to buy UP to the max award. You could also buy 0. It was a small business set aside as well, so you aren't going to get competition from Barret/Sako/beretta/KAC/ect.
I used to write and solicit these all the time. Its just an option to buy X amount at X price, and I dont see any initial award value which means that haven't bought anything yet.
My guess is $10K per rifle with a max of 500 units. That price includes training, spares and travel for factory armorers to train the trainers. These are 1 year contracts with 4 option periods for a 5 year period of performance.
They will probably buy like 20, outfit BORTAC and maybe a few for regional SWAT/CERT or whatever they call themselves. Meanwhile their training partners (US DOD) will be using SR-25 variants and MK22 Barretts. Real smart choice there cotton.