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Thanks for the reply. I'm leaning towards getting one. They say this is a Gen 3 model and I'm seeing them for $90 which seems like a good deal. So, it feeds and functions reliably?
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At the time I bought the one I have, Torx and Stern were the only other Glock magwell adapters - ATI hadn't released their version yet - so I paid the same as what the Stern adapters were selling for at the time. I have no idea what "Gen 3" is, how their Gens differ, or what Gen the adapter I have is.
As for feeding, that depends on several factors including, but not necessarily limited to: ones barrel chamber entry configuration, the geometry of the magwell (for dedicated lowers) or the adapter geometry, the magazine, and the ammo geometry. As well as the SA adapter, I have a dedicated Glock mag AR lower. And I have two 9mm AR uppers. No combination of uppers and lowers feeds flat point ammo very well. As I only shoot 9mm round nose ("ball ammo") in the AR pattern rifles, I've no problem with leaving hollow point and flat nose defense type ammo to a Glock pistol only application.
Best of luck whatever you pursue.
MHO, YMMV, etc. Be powerful; be well.