This is the nicest +5 on the market. - The Gun Company The Gun Co +5 Magazine Extension for Glock 19

I'm not sure if I got a newer iteration of this extension based off of the other people's reviews but mine has The Gun Co. logo prominently displayed in white on the front and the titanium bottom plate also has the logo engraved. This is the first extension I've purchased for the 19, or 17 for that matter that actually increases my capacity +5 as most other extensions usually give me +4 max. Came included with the 12 coil spring which is nice and I get perfect lockback on empty. This bad boy is easily nicer than my SLR, TyrantCnC and others I have. You won't be disappointed