The USMC is adopting a .45 ACP pistol for some units. The Karl Lippard Designs, Military Weapons Division, Pistol Automatic, Cal .45 CQBP Close Quarters Battle Pistol has been mentioned:
Yours for only $4,995. This pricing makes the the $995 Boberg Arms XR9-S or the $1069 Boberg Arms XR9-SO seem like a bargain! I hope that the XR45-micro will be priced a little lower than the CQBP, which appears to be an very attainable goal.
Make that XR45-micro handle the .45 ACP round and you can carry four of them for less than the cost of one CQBP. Probably not too much difference in weight, either. Those BDU pockets can hold a lot of Boberg Arms pocket pistols.
Since the CQBP is essentially a 7+1 round .45 ACP weapon, an XR design with corresponding round capacity and a 4 inch barrel should compare nicely in performance. An XR45-micro with an extended magazine and a longer barrel would be a good start.