Too dangerous for me - American Tactical Imports AR-15 Mag Well Adapter, 9mm, Glock

Didn't feed well. I had several double feeds per magazine with this product, and at least once the round bounced around inside the upper and ended up facing backwards. Very unreliable. The Last Round Bolt Hold Open feature was too finnicky and may or may not work in any given rifle depending on the specs of the mag well and whether the LRBHO piece of wire mates up properly with the magazine follower and the bolt catch. Mine didn't. Not recommended. One round got jammed so bad it forced the bullet so deep into the case it would have been dangerous to fire due to probable extreme high pressure. This was my experience. Your mileage may vary.