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Posted: 7/24/2016 6:00:08 PM EDT
Im thinking of adding a 9mm AR SBR and I have a SBR KAC lower, whats the process to convert it to 9mm? What do I need?
Link Posted: 7/24/2016 6:19:55 PM EDT
[#1]
An existing lower needs a magazine block to take 9mm magazines for the desired platform.  In some cases, a different bolt hold-open may be required, as well.
Link Posted: 7/25/2016 2:17:00 AM EDT
[#2]
IM sent.
Link Posted: 7/25/2016 3:49:35 AM EDT
[#3]
You also gonna need a 9mm bcg

Either it needs to be ramped or you will need a 9mm hammer

Also will need a "correct" buffer assembly. I say correct because it's something you may need to play with to get it working right. Have a few extra bolt catches handy cuz I'm sure you will break a few in trial and error.

Need a 9mm barrel too and comp/brake etc to match

Also I recommend a dedicated lower. I tried the whole mag block setup and it was just more hassle. Esp cuz also the dedicated Glock lowers have dropped in price and made pretty nice with set screws and such.
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