The ones that I have on my two 52s are the extended slide type. In my opinion, those are the strongest . Don`t forget to get also the adjustable slide pivot pin , also from the same store ($6.00) . it will make very easy the adjust and install of the slide release. The install of the release is very simple , just when you slide the pin out, keep the punch in the hole to avoid the takedown latch to jump at you . If you like , take it off slowly, clean the spring and lube it , and put it back again when you install the new pin . It has a channel carved in so there is no mistake. To adjust it, simply tight the nut slowly and carefully until the slide stop would not move freely up and down , then back off a little until it does . I personally put a little loctite blue on the pin treads , to make sure it would not get loose with use.
