I prefer calling the takedown lever a "plate" that functions as a "slide lock" as Glock calls it because the "lever" is not the plate at all - but the leaf spring that contacts the plate and makes the arrangement a "lever" as in a mechanical device that outputs more work than is input.
So, it's not really a lever without the leaf spring which Glock appropriately calls, the "slide spring."
It's true that it takes very little backwards movement of the slide (at least 3mm on my slide) to get to that .59mm gap betwen the plate and the barrel notch. There is some free play here.
Glock's "slide lock" does not engage the slide - so that is a bit of a misnomer, too, since it engages the barrel. On the SDxVE, the leaf spring is not mentioned EXCEPT when swapping out the stock plate for a 4mm wider one.
The Glock does not have the stupid U-shaped spring in the SDxVE (if it is a spring since I don't see it functioning as one). IMO, it serves as a resting place for an S-shaped leaf spring where, in my case, it does not rest, but slides when you work the takedown plate/lever edges.
The takedown plate has a tendency to slide from from one side of the frame to the other - making the gripping edge nearly flush with the frame instead of sticking out far enough to get a good grip on it.
It is the reason why Galloway Precision sells a lot of wide takedown levers.
When the lever plate slides side to side, the leaf spring moves, too, from being absolutely perpendicular to the plate where it fits into the notch above it to the spring tilting when the bottom slides towards the side that was pushed inwards.
The result is, when you press down on the opposite side - the one now protruding further than the other side, you are not compressing the leaf spring fully but only partially as the bottom of the leaf spring slides to down side and makes it harder to drop the plate evenly with the other end still sticking up.
So, in effect, my takedown lever is not being moved out of the way of the barrel and allowing the recoil spring to move the slide forward simply by uncoiling and not requiring any push on the slide.
So, besides the slide only needing a minimal movement rearwards to drop the top surface of the plate below the barrel lock, and a quick release on the slide will propel it forward - especially if the front of the gun is tilted down.
Unless you swapped out the stock recoil spring, i've never had the slide fly off like I did with my Sig P250. Of course, I could work the takedown level the same way as on my Walther PPX; i.e., lock the slide back, pull the trigger, rotate the takedown lever to vertical, and release the slide catch.
Since the slide is held halfway back by the catch, if you don't hold onto the slide when you press down on the lever, you can launch it into space.
Since the Glock uses a stationary L-spring that never moves from side-to-side, it is possible to pull the entire takedown lever by only pressing down on one edge - if you do it fast enough. But, the slide removal is aided by having a wider plate, and if you look at the photos Galloway has on tis website, the wide takedown lever for the SDxVE looks identical to the Glock series 17, 19, 21, 22, etc. (Gen 1-3)
In fact, the same seems to be the case for the SS guide rod/recoil spring unit unless Galloway is using the same photos for expediency sake. I find it hard to believe that the springs and rods would be interchangeable. I hpe they are because the Glock rod/spring units sell for $18 versus $30 for the SDxVE.
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Originally Posted by cou1954
I believe the name (and function) of that bar is actually "Barrel stop". It takes a heck of a beating when the slide returns to battery after the gun is fired. You will notice that it's in a pretty hefty part of the frame.
Actually I also usually call it the "Take Down Lever", or some such name because that's what most folks call it.
The barrel only engages it by about a millimeter, maybe less, so you only have to move the slide (with barrel) back a tiny amount to release the stop. [I exaggerate . . . I measured the depth of the groove in mine and it's only .59mm deep.]
It's an important part because it positions the height of the barrel before the gun is fired.
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