I've bought two of these from Markl. (I haven't gotten around to shooting the second one, yet!) I'm fairly new to shooting so I can't really give a good review of the performance of the 37. However, I have no complaints at this point in time.
After I purchased the first 37, I sent an e-mail (September 1, 2011) to Ryan Castor of Markl Supply...
++++++++++++++++++++++++++++++
Hello Ryan,
Looking forward to receiving the Glock. I'm just curious... I "assume" these Glocks became available due to a Law Enforcement "change out/upgrade?" Any thoughts on "why" they changed out? Again, just curious.
Thanks!
Bill
++++++++++++++++++++++++++++++
Ryan's reply, 8 minutes later...
++++++++++++++++++++++++++++++
[FONT="]Hi Bill,[/FONT]
[FONT="]These guns are actually PA State Police trade-ins. Each new recruit with the PA State Police receives a brand new Glock service weapon. Each weapon that belonged to a retiring officer is sold back for credit towards the new service weapons. In general, those officers retiring tend to fire their service weapons less, which, in the end gives us some really nice weapons to pick from for our customers.[/FONT]
[FONT="]The department has not decided to transition out of the Glock 37 at alltheyre just very adamant about having a brand new service pistol for each brand new recruit.[/FONT]
[FONT="]Hope this helps.[/FONT]
++++++++++++++++++++++++++++++
Anyway, you may want to call Markl's and see what they have to say - 412-358-9660.