Hi David and welcome. Not factory. Only Magazine Blocks are available until Springfield or 3rd Party makes some compliant magazines. magazineblocks.com/magento/products/magblock-kits/pistols/sti-limiters/springfield-1911-ds-prodigy-magblock-9mm-10-15-round-limiter.html

David, unfortunately at the moment Springfield doesn't make any 10 round magazines or new jersey compliant versions of this. It has been pretty popular so could definitely see them doing so in the near future. Sorry but hope this helps some.