Glock had a lot of balls and already blew thousands certifying their guns and probably thousands more on counsel fighting the shitbag AG at various levels or
another.
Also Barett can do what he does because last I knew armorers for their guns don't grow on trees. Glock stops selling to LE in MA and someone will just drive around
them, or smith will just take all the PD sales over. (they already took a bunch from Sig).
The threat is a lot less forceful when we're talking about $500 throwaway guns, most of which likely will never need service over their typical LE lifespan, vs $4000-$10,000 dollar precision rifles.
Barett also controls his distribution too... its not like there are a bunch of distis with M82A1s hanging around in stock.
-Mike