I just sent them an email but I'm impatient so I'll ask here. I just got a new max 11/15 upper, but it won't release the bolt from the under hook on the buffer mechanism when using the charging handle after installation. I've got the lage suppressor block installed in the lower. Anyone else know if that's incompatible with the 11/15? I could see how that block might prevent that hook from being able to travel down to unlatch itself from the bolt.