OP must work for the Guberment. The government and corporations purchase COTS to save Research, Development, Test, Evaluation, and Logistics costs.
Over 90% of anything you can think of that the Gov or a corporation uses there is usually a Commercial version that will do the job. Training, support, parts, infrastructure to supply & support already exist with an established price structure.
Need a buldozer? Buying one of many manufacturers dozers is quicker and more cost efficient than designing and constructing your own.
Hence, OP wants a Tikka, Remington, Sako, Ruger, Winchester, Savage, etc you can go buy in the store vice a custom that will be special order and cost magnitudes more.