SOLGW has A5 buffer kits in stock. Definitely a worthwhile upgrade if you're not already invested in some other AR buffer system (Geissele Super 42 is what I'm playing with for the near future, but the A5 is perpetually tempting).
https://sonsoflibertygunworks.com/co...ant=3084170945
Lots of other goods on there that are worth a look. Their BCGs are a steal at the current price.