1. who cares
2. the list reads "M&P 9". it's the same gun. it's already on the list. find an FFL to transfer it and congratulations. please stop inventing rules that don't exist.
^^^^^ This!
I know that some want to see SKU 121232 on the roster and some moronic mfrs have done this, it is beyond stupid and causes all sorts of problems where there should be no problems. Smart companies list the gun as Model 123, no dash numbers, no SKUs, etc. Therefore when they make minor changes that have NO affect on the safety or test results of the tested model, they are GTG!
Review the requirements (tests) to get on the EOPS Roster . . . it involves things like melt point of the steel, drop tests, etc. Changing the grips, sights, a SKU with 1 mag vs. a SKU with 2 mags, adding a rail, etc. have ZERO affect on the safety of the gun or the prior test results. I'll use the modular Sig P320 series as an example . . . no matter the size of the gun grip module, caliber, sights, color of the grip module, etc. all these models should be on the roster by "engineering evaluation" (allowed in the law) done at the same time they tested a particular model . . . none of these variations change the test results.
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To the OP's question:
It's all up to S&W. Whenever they get the guns tested and submit the results to the GCAB at one of their monthly meetings, it gets "recommended" for approval and goes to the Secretary of Public Safety for his/her final approval (it can sit on that person's desk for days/weeks/months or be dealt with immediately, Sec. of PS is in the driver's seat), once it is signed off, it waits until the publication of the next (roughly quarterly) roster in the Boston Glob and then it can be sold in MA (assuming mfr asserts that it meets AG's BS requirements as well - that is a self-certification as long as it isn't a Glock).