Works great - Stern Defense MAG-AD9 AR-15 Glock 9mm/.40 Magazine Conversion Adapter

Worked just fine, just make sure you read the instructions Doesn’t drop the mags free but it’s a fun fun. Component list: Faxon bolt and barrel 9mm, spikes tactical 7.7 oz buffer. All worked well together or well it’s what worked for me but you know how these builds are. Rough recoil but a fun time.