I've A-B'd my MP5 and a CMMG, no comparison. Have not A-B'd the CMMG and a standard blowback AR9.

Have many thousands of rounds on my semi MP5. As much as I like it, the ergos, ability to hang a light/switch/optics and trigger is lacking for sure. If the JP5 shoots similiar to my MP5, will sell the MP5 to fund the JP5.

From the conversation I had with JP last week, the JP5 will be available on their "Rifle Builder" sometime in the future. When that is, who knows.