MoRivera

I used one for a while and didn't have any problems with the mag release once I got used to it. But I like the concept of a larger one like that, anything that makes its quicker and more definite...especially for a lefty shooter. I'd also like to see a Stern Adapter that works with a CMMG Radial Delayed Blowback upper.

Weight to his frame a la a deactivated light I think.

I'm betting on Halley's Comet coming back first.

Mine are the Gen 2's from what I can tell, and so far they've worked great. But have only run factory 155's.

I ordered a CZ round-spur hammer that comes on the 'standard' TS, and I tried it in one of my Shadows. that hammer has notes that tare so tiny the the resulting SA break must have been less than a pound! It actually scared me a bit it was also light and I took sth hammer out, login with a CGW competition hammer instead. I know some TS's come with stock trigger-breaks that are crazy light, and I can see why. This just felt unsafe to me, even with a 16-lb hammer spring. I was thinking that perhaps since the sear cage in an SP01 can move a bit...as opposed to in a TS that has two tiny springs securing it in place more....that may have something to do with it. In which case I'm glad that it can have at least some leeway of safe engagement with the other competition hammers. Edit: actually scratch that being a TS hammer, because it had to be a Shadow hammer to work double-action in the Shadow, so wow was it light!

I 'semi-short-stroked' one of mine because I still wanted the LRBHO, but didn't want the bolt going back so far that it would shear the bolt catch on return (which it did once). Measured with the number of quarters needed and had a friend make a spacer out of nylon dowel. This was in a system with an A5 tube, a Blitzkrieg hydraulic buffer and a wave spring in it. I put the spacer at the back of the tube, had it between the main buffer spring and wave spring first.

Yeah...gotta be careful, I've known some guys who had felt they honed away a small amount, but ended up wearing through the surface hardness treatment, so it ended up wearing away more as he shot it On one, after some time shooting (several matches) the gun started going full-auto....at a match!

That decocker sear cage is a pain though, with the slave pin, etc. The little lifter spring is the cherry on top.

Right which is why I mentioned " ...assuming that he wouldn't take it out of a regular SP01." and wanted to keep a Shadow a Shadow, or a 75B a 75B. I have also built a Shadow in the past from what was originally a regular SP01 frame and a Shadow slide (since I now have multiples), using both a CGW adjustable sear as well as the spacer in place of the firing pin block lifter. That's simple, but the other way around.....a Shadow frame and a regular SP01 slide, you'd have to take out the firing pin block plunger which some have done, but is more specifically removing a safety feature specific to that slide/model and would technically make it an illegal gun for competition I believe, if that matters. Also, if (as discussed) one was looking to have two interchgangeable slides for the same frame...probably preferable that they're both for the same type of gun rather than having to switch a lifter/spacer each time you switch slides form irons to optics, or again having to remove a firing pin plunger and making it illegal for competition, if applicable. And yes, decocker model sear cages are a pain in the ass to work on from my experiences...mostly because of the slave pin et al getting it back into the frame, not necessarily because of the lifter. Maybe it gets easier over time, but after a few times it's easy to never want to do it again. I actually don't even think the decocker models can function without the firing pin block lifter, but I've never tried doing that and can't imagine why anyone would....seeing the the whole idea of having a decocker (even though the CZs decock to half-cock) is to lower the hammer without lifting a firing pin block out of the way.

The person I was responding to seemed to get the context just fine.

I ordered a couple titanium pins from Iron City since they were having a sale. We'll see how they hold up. Probably really well for at least the foreseeable future since I'm not shooting as much while trying to conserve ammo these days.

I definitely like my red dot as 'buried' as can be and low to slide since it matches up the best with how I line up iron sights, especially since I still shoot a lot of iron sights. For my Shadow with a TS slide, I originally tried a dovetail adapter plate and it wasn't bad since the rear sight cut is already rather buried for an LPA adjustable. But I still didn't like how the plate coupled to the slide (just in the dovetail area with everything else kind of 'suspended' up over the slide) and wanted it lower. So like with my normal CZ Shadow, I ordered another TS slide (already fitted to use on SP01 frame) milled for a Vortex Viper.....a red dot which itself sits pretty low as well. Thing is...when I got it, this is how low it sat...... Which is REALLY low. So low in fact that....because the bores/sightlines on CZ's actually point a bit down as opposed to exactly parallel with rails...the dot was actually a little below the muzzle when lined up...even without a front sight post! Why so low? Because they had to mill down to the bottom level of the original dovetail, which is already really down there on that buried LPA cut. I didn't really consider this when I requested the milling for this specific red dot unit, as it wasn't the case on my 'regular' Shadow slide with less of a 'buried' rear sight. So I was at first pretty bummed, but a mechanical engineer that I shoot with offered to fabricate a 1/8" riser plate that would fit that original cut and that I could screw through with longer mount screws. And then I added the four corner 'pins' so I ended up making a mounting plate anyway but only to make up for the extreme depth of the cut. The riser plate put the red dot at the perfect height where the housing is still nice and low but the red dot is right about at the level of normal iron sights and clears the muzzle fine. It's super stable since the bottom off the plate is contoured to couple/fit snug like the Viper did (and like plate systems on other guns), and the top of the plate has the four registration pins....keeping all the stress and risk of shearing off the mounting screws. And the height is perfect. So just a word of caution to others, make sure you're going to have the kind of height and clearance you want when doing a direct-mill-job on a slide for a specific model or optic...ESPECIALLY on a CZ. I was actually lucky in this case, because I couldn't have just swapped out another red dot in the original milling since the Venom and Fastfire have slightly different body dimensions than the Viper for which it was cut for.

I was referring to if he wanted to get an additional complete slide milled for optic, like I did. Depending on if you're getting one for an SP01 Shadow or a regular SP01/SP01 Tactical, there is a difference as to which slide will work when interchanging with your lower, since the Shadow models don't incorporate a firing pin block...assuming that he wouldn't take it out of a regular SP01. I was responding to the poster immediately above, with whom I was discussing interchanging complete slides just a few posts before.

Yeah that's what I mean, I'm trying to remember when I had a TS Blue, I don't think it had a lifter spring since it's not double-action. So that's why it was strange to see it in these CG-animated exploded views. Here's the older TS schematic.... As Tok36 alluded to, perhaps this new trigger bar does not ride in a slot in the frame like the older ones, hence the need for the lifter spring.

Might be a mistake on the animation, too.

Good catch. Yeah that is odd....wonder if new part or whether the CZ75/Shadow 2 one now fits in that frame/well.

Looks nice.

I'm trying to look up straight-blowback examples, so far the Grease Gun and Thompson, and how those designs avoided firing-pin breakage. From what I can tell they don't have as massive a hammer striking them from behind like an AR, and maybe they also rely on the forward momentum of the entire bolt more seeing as they both fire from an open bolt. Maybe a redesign of the pin profile like Les mentions above might be all that's needed. Also, don't know how related this would be, but when the Sig P365 first came out it was breaking the tip off the striker for some, and they later redesigned it to resist it better. In the case of the Sig, it seemed that the cartridges were being 'sideswiped' a little by the firing pin as they ejected, as evidenced by some smeared indentations on ejected case primers, which may have applied some lateral force to the striker pin upon firing/cycling and contributed to them being snapped off. I don't remember looking at any ejected case primers for my blowback AR9's, so I can't compare. Here is a comparison of the old vs. newer striker tips... Additionally, it would seem that the longer pin section could maybe avoid the base from making contact with the breech? Anyway, just some more thoughts.

Need be clear though as to whether your gun is a 'regular' SP01 (with internal firing pin block), or a Shadow.

Stuart sometimes has them up in the classifieds in the CZ Forum, but you can also just ask him via PM if he has any. I did the same with long slides that I have another Shadow frame....essentially Tactical Sport slides that fit SP01 frames. One with irons, another with optic.

I ended up getting an extra slide for my SP01 Shadow from Stuart at CZ Custom and having it milled for a red dot (Vortex in my case). That way it's a pretty simple switch of slides between Production and Carry Optics. Not the cheapest option but so much easier than switching plates and re-zeroing, etc.

Agreed, but again we're talking a system that was designed to have the rear of the bolt be pushed against while stationary (well, it rotates at first) by gasses, and then pulled away by the reciprocating carrier. In comparison in an AR9 with no separate bolt, there's no delay after striking and it's being moved back at a generally higher velocity. So in that respect it's under a higher degree of impact. The reason why I look at it this way is that those of us with the CMMG Radial Delayed Blowback have noticed very premature extractor spring wear as they come stock and have had to replace with an extra-power spring. And that system is even more similar to an AR15's gas impingement except that it too is being forced back by recoil of the round, and from conversations and analyses it seems that has something to do with the forces that the spring is under as opposed to the original gas-piston/impingement action. So perhaps the answer might somehow lie in making a smaller firing pin? Like one used in a pistol that doesn't have as much mass behind it when slamming forward and then immediately back, maybe use a transfer bar that somehow won't stay on the pin when the bolt recoils? That way less inertia stressing out that little tip area, I guess. Whatever the options may be, I think it's the lack of delay in the blowback that's the key hurdle.

As I mentioned above, the .40 extractor can be slightly shaped so that it has a more reliable 'grab' on the 9mm rims, but from the sound of it it isn't crucial. I just like having the extra assurance.

Yeah, I'd say it's placebo and/or your fixating on the pull somehow. As has been pointed out, the FP doesn't have any contact with the hammer or trigger mechanism until the hammer falls and strikes it. And frankly, if it's only a 1/4-lb in difference you feel....maybe it's a cleaning/lube issue.

I believe the disclaimer I added to clarify should be more than enough, that it is no way meant too imply that it may be the case. Should be plenty for anyone who bothers to even read it to ignore it. Besides, I can't edit that post anymore even if I wanted to as the function is no longer available after such-and-such time. And I fully agreed and acknowledged that speculation adds no value as Sarge mentioned, he just didn't need to be an ass about it. But by now it's a non-issue and not being brought up anywhere else.