ArrDave Posted February 21, 2018 Share Posted February 21, 2018 I remember reading a post about a year ago of some guys with some high speed science equipment that seemed to suggest the battering of the slide stop happens on the slide closing. Topic says it all - would a heavier RS increase or decrease the slide stop life in the 75B (including SP01s, etc) guns? Link to comment Share on other sites More sharing options...
yigal Posted February 21, 2018 Share Posted February 21, 2018 (edited) heavier recoil spring increase the longevity of the slide stop. +1 without does - and - ? Edited February 21, 2018 by yigal Link to comment Share on other sites More sharing options...
ArrDave Posted February 21, 2018 Author Share Posted February 21, 2018 6 minutes ago, yigal said: heavier recoil spring increase the longevity of the slide stop. +1 without does - and - ? Have you observed this in your own guns? What round count are you seeing failure at? Link to comment Share on other sites More sharing options...
kneelingatlas Posted February 21, 2018 Share Posted February 21, 2018 I use very light recoil springs and have never broken a slide stop. Link to comment Share on other sites More sharing options...
thompsoncustom Posted February 21, 2018 Share Posted February 21, 2018 Same here run a 10lb recoil in both my production shadow and open shadow (major). Never broke a slide stop in any cz Link to comment Share on other sites More sharing options...
Sliv2 Posted February 21, 2018 Share Posted February 21, 2018 My practice S1 made it past 100k rounds on its original slide stop (the "cut" version from AA) with 11lb recoil springs. Link to comment Share on other sites More sharing options...
ArrDave Posted February 21, 2018 Author Share Posted February 21, 2018 I must have awful luck, I've broken a handful of those slide stops. Link to comment Share on other sites More sharing options...
IHAVEGAS Posted February 21, 2018 Share Posted February 21, 2018 26 minutes ago, ArrDave said: I must have awful luck, I've broken a handful of those slide stops. All in the same gun? I seem to be about average on CZ 75 s, last one busted at about 7500 rounds ish. Else had an STI Trojan that would bust them at something like every 4000 rounds until STI refit the gun under warranty. Link to comment Share on other sites More sharing options...
Sliv2 Posted February 21, 2018 Share Posted February 21, 2018 54 minutes ago, ArrDave said: I must have awful luck, I've broken a handful of those slide stops. Based on internet feedback, it appears we're more likely extremely likely, and in the minority, without suffering broken slide stops. Link to comment Share on other sites More sharing options...
kneelingatlas Posted February 22, 2018 Share Posted February 22, 2018 3 hours ago, ArrDave said: I must have awful luck, I've broken a handful of those slide stops. Which recoil spring are you using? Link to comment Share on other sites More sharing options...
kujo929 Posted February 22, 2018 Share Posted February 22, 2018 I use very light recoil springs and have never broken a slide stop.What weight are you using in open guns? I have a couple open Tanfo’s to dial inSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
kneelingatlas Posted February 22, 2018 Share Posted February 22, 2018 Anywhere from 8-12# Link to comment Share on other sites More sharing options...
3gunDQ Posted February 22, 2018 Share Posted February 22, 2018 (edited) 3 hours ago, IHAVEGAS said: last one busted at about 7500 rounds ish. Else had an STI Trojan that would bust them at something like every 4000 rounds until STI refit the gun under warranty. On that CZ that is like two cases of projectiles... and that is ridiculous. CZ blows. Sti blows too, but at least they repaired the shity gun they threw together one Friday afternoon. Edited February 22, 2018 by 3gunDQ Link to comment Share on other sites More sharing options...
Superpipe9 Posted February 22, 2018 Share Posted February 22, 2018 I use a 11lb recoil spring and have broken 3 of them in 12,000 rounds so far in my TSO. 172pf ammo. Link to comment Share on other sites More sharing options...
yigal Posted February 22, 2018 Share Posted February 22, 2018 8 hours ago, ArrDave said: Have you observed this in your own guns? What round count are you seeing failure at? that depends on ammo too. stronger pf ammo brake them faster. i asked from shooters in shooting club menage registration of ammo qty. they shoot in all cz guns. we use same factory ammo with pf ~135-142 9mm. in tso that used recoil springs 11-13lb. ss. breaks 5-6k regularly . in tso that used standard r.s.-16lb it holds 10-15k in shadow 1 with 16lb r.s it holds 7-9k with 13lb ~5K+ in shadow2 it never . brakes . but we don't have them any more. i install in 2 tso ss from one of tanfoglio models that have same dim. and it still works after 10k. Link to comment Share on other sites More sharing options...
Brooke Posted February 22, 2018 Share Posted February 22, 2018 No question Shadows break slide stops. I have broken one in a Shadow 1 and two in two different S2's. I'm shooting as light a load as I believe will pass chrono. About 132 PF. All the guns have 11 lb recoil springs. Where I differ from the original poster is assuming the breakage is on slide closing. You need only inspect a used stop to see the wear on the front side of the pin, not the rear. All three of my failures left the pin breakage pointed toward the grip, not towards the muzzle. Link to comment Share on other sites More sharing options...
HI5-O Posted February 22, 2018 Share Posted February 22, 2018 Do you use the recoil buffer/shock buff? Link to comment Share on other sites More sharing options...
Ludde Posted February 22, 2018 Share Posted February 22, 2018 If you look at the design. When is the slide stop stressed? According to my observation the slide stop is mechanically stressed when the gun goes back into battery (i.e. when the slide travels forward after picking up a new round). The slide travel forward is essentially stopped by the slide stop pin. Without the pin the slide and barrel would continue forward towards the berm. When slide is moving rearwards during recoil the slide hits the frame and is stopped without slide stop having any effect in the scenario. You increase the level of stress if you have a strong recoil spring (increase in slide travel speed in that direction) and most definitely if you let the slide slam forward on an empty gun, i.e. without any rounds in the magazine, using e.g. the slide stop release letting the slide slam forward without having any new round being chambered and thus slowing down the action a bit. Weaker recoil spring and don't slam the slide forward on an empty gun will prolong slide stop life. Link to comment Share on other sites More sharing options...
yigal Posted February 22, 2018 Share Posted February 22, 2018 check all cz broken ss and u will see that starting breakage point is rear (close to mag. ) and not from front side. => impact from recoil much stronger than forward impact. ss has complex forces in 4 different vector directions not only back and forward . cz use wrong tech .producing this part. u can always take ss from tanfoglio that made it correct. they have few types: one fit sh1 and other for ts Link to comment Share on other sites More sharing options...
coolcw1987 Posted February 22, 2018 Share Posted February 22, 2018 18 hours ago, kneelingatlas said: I use very light recoil springs and have never broken a slide stop. 18 hours ago, thompsoncustom said: Same here run a 10lb recoil in both my production shadow and open shadow (major). Never broke a slide stop in any cz I find it strange that "kneelingatlas" and "thompsoncustom" (which have probably owned more cz's then everyone else in this thread combined) havent broke a single slide stop and there running both ends of the extreme minor and major. So what is the difference between what these guys are doing and everyone else? Link to comment Share on other sites More sharing options...
Sliv2 Posted February 22, 2018 Share Posted February 22, 2018 2 minutes ago, coolcw1987 said: I find it strange that "kneelingatlas" and "thompsoncustom" (which have probably owned more cz's then everyone else in this thread combined) havent broke a single slide stop and there running both ends of the extreme minor and major. So what is the difference between what these guys are doing and everyone else? Probably just regular maintenance, namely changing out recoil springs, if I'm permitted to speculate. Or, as troll master yigal says, they used Tanfo slide stops instead Link to comment Share on other sites More sharing options...
yigal Posted February 22, 2018 Share Posted February 22, 2018 18 minutes ago, Sliv2 said: Probably just regular maintenance, namely changing out recoil springs, if I'm permitted to speculate. Or, as troll master yigal says, they used Tanfo slide stops instead sorry i break 2 ss on cz75 in 1986 since i made them by myself . in tanfoglio i shoot 70k 9minor with light compensator without breaking it with 13lb rs. Link to comment Share on other sites More sharing options...
kneelingatlas Posted February 22, 2018 Share Posted February 22, 2018 2 hours ago, Sliv2 said: regular maintenance, namely changing out recoil springs Who me?!? I have so many recoil springs God only know how old they are I just dig around in the box, pull out a long one, feel the flex, and roll with it ? Link to comment Share on other sites More sharing options...
Tommytwogunz Posted February 22, 2018 Share Posted February 22, 2018 (edited) 1 hour ago, kneelingatlas said: Who me?!? I have so many recoil springs God only know how old they are I just dig around in the box, pull out a long one, feel the flex, and roll with it ? Well I am just starting out, but with a bang as I have recently bought two Parrots, one CM, and already had a TS and a Shadow; plus other light weight CZs. So I am now in the market for some springs. For the first time I took my Parrots and CM to the range and tried shooting stock off the shelf ammo. The CM would seldom cycle and I had to manually clear the spent round and chamber a new one. The Parrots never cycled. On the advice of posts here which I followed I was told to try and see if the Parrot/CM would cycle with the stock spring and if not get a lighter one. Not everyone agreed about how light and 11# seemed to be the average; but maybe not the best choice. I am looking at going to CZ Custom and getting several 10# and 11# springs for the three weapons. Cost does not seem to be an issue with these items but I would like to avoid having to dig around in a box to get the right one. Any advice on what weight you suggest. I am also fairly sure that the Parrot needs a lighter spring than the CM based on what happened at the range since I was able to get it to cycle several times while the Parrot never cycled. So maybe I need different weight springs for different weapons. This CZ stuff is hard to figure out. At least for me. The Parrot had the compensator on it while the CM did not. Edited February 22, 2018 by Tommytwogunz Link to comment Share on other sites More sharing options...
NoKimberDave Posted February 22, 2018 Share Posted February 22, 2018 I broke one in a CZ75 that had thousands on a stock heavy recoil spring. Went to a 10lb spring and shot more rounds than that and it hasn't broke another. If it is hitting pin on closing, than a heavy spring is gonna slam it harder. On a 9mm TSO, I went to just a pin and have well over 10g rounds thru it and the pin doesn't show much wear. 9lb spring in that gun. But I do use a buffer in it. Link to comment Share on other sites More sharing options...
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