Want an extended slide stop release but don't like Glock's factory extended release lever? Go get a Vickers slide stop. It stands a little more proud than the standard slide stop without extending further to the rear. This keeps it clear of your thumb while still providing ample purchase for positive activation. $19 for your G17, G17L, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34 or G35.
Available from Grey Group and Net Tac.