The Original CZ Forum
CZ LONG ARMS => CZ Scorpion EVO => Topic started by: steele6599 on February 25, 2016, 11:58:16 AM
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So just curious not that I would consider changing anything on mine... Like the 3 round burst selection how is that done? I would love to see some pics or explained...
Thanks.
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Different hammer, auto sear,cam, and disconnector, I would bet. Cz literally has 2 different trigger packs civilian and leo military. Though I have never set them side by side this is what I've seen in many other rifles unless I'm forgetting something. Maybe some LEO can help us on what CZ used specifically.
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A= Army
S= Semiauto
1= 9mm
2= 40sw
Differences in the Army model are the select fire trigger pack, the markings on the receiver sides, and to the best of my knowledge, there is a cooling shroud over the barrel in at least some models.
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(http://imageshack.com/a/img921/5119/yl5r3a.jpg)
(http://imageshack.com/a/img924/5875/HaIjHP.jpg)
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Where can I get part #39? I'm a fan of the "wings"
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You might be able to get one at CZ-USA.
The S1 is unable to be changed to the A1 by design, and attempting to do so would be a federal offense. Discussing how it could be done can be prosecuted as conspiracy to violate NFA '34 - ATFE has absolutely zero sense of humor.
Now if you would just like to see how the A-1 design works, there might be a video around somewhere of it, probably narrated in Czech. Considering no police agency or military in the United States has adopted the Scorpion A1, I doubt there would be any video in English.
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There are a lot of moving parts in the auto version's trigger pack.
Very interesting. Some of the stuff is pretty obvious how it works and not very different from other autos, like the sear trip (55), but there are some weird parts in there, specifically part numbers 50 and 53. What does a "hammer lever pin" do? Part 59 is a weird one, too.
Looks like every part in the trigger pack is different, to include the metal trigger case. I would not be surprised if the plastic housing and receiver are also different. The bolt probably also has a ramp to trip part number 55, though the ramp isn't visible in the drawing.
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Looks like every part in the trigger pack is different, to include the metal trigger case. I would not be surprised if the plastic housing and receiver are also different. The bolt probably also has a ramp to trip part number 55, though the ramp isn't visible in the drawing.
Yep - I would bet to keep it from being "easily convertible" there were some changes made to the bolt and possibly trigger pack dimensions so that the A1 lower won't just drop into a S1.
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Wondering what the cost and availability of part 74 is?
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with a burst cam, if you pull the trigger and release it after only 1 or 2 shots were fired (pulling a single or double), the next time you pull the trigger, you will only get the third shot and you'll have to reset the trigger and pull again
That's true with the M16 style burst mechanism, but others, notably HK, have figured out how to make the burst mechanism reset with the release of the trigger. I'm guessing, since the ratchet has pawls on one side only, the A1 resets regardless of the number of shots fired in a burst.
That being said, burst seems like an unnecessary mode.
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I didn't notice this topic was months old until I had a reply typed up, so I'm not just going to delete it now.
Sorry about that. I have a habit of refreshing older threads that leave me with questions. Like where can one find part 39? As far as I know, CZ-USA only sells the S-1 version and not the A-1 version. I don't even know why they even made the change in the 2016 (gen2) models. It's not as if it's a 922r compliance part.
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Hi
Sorry to drag up and old topic. However I'm curious as to know the internal difference between an S1 & an A1.
I own an EVO 3 A1. So can provide some internal photos if anyone is interested?
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(http://behllc.drivehq.com/~buckshotbarry/images/FA%20Scorpion.jpg)
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(https://imgur.com/a/A2lzM)
(https://imgur.com/a/WnACn)
(https://imgur.com/a/zw0KO)
https://imgur.com/a/A2lzM (https://imgur.com/a/A2lzM)
https://imgur.com/a/WnACn (https://imgur.com/a/WnACn)
https://imgur.com/a/zw0KO (https://imgur.com/a/zw0KO)
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Thanks for that photo. I've searched high and low for one.
Is the bolt different too? I was under the impression that they were.
I'm not sure, I just ran across it when saving the A1 parts diagram. I REALLY like czevo3a1 photos!
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Your welcome guys
Now can someone please show me the trigger group and bolt of their S1 Please
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Thanks John
Surely the trigger group and bolt must be different sizes too? Otherwise you could swap them out easily.
Finding them however would be difficult
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Necro posting...
I started researching this to try and determine if the relatively few OOB detonations resulting destroyed receivers were related to the batch of bad Firing Pin Blocks (see here (https://www.reddit.com/r/czscorpion/comments/gzdgo2/out_of_battery_cz_scorpion_bolt_strip_and_fpb_fix/) and here (https://www.reddit.com/r/czscorpion/comments/h0m887/defective_firing_pin_blocks_what_it_is_how_to/)) or perhaps some fundamental flaw in the effort to make the S1 difficult/impossible to convert to an A1.
Based on what I've seen here and in other forums, the key differences between the A1 and the S1 are almost exclusively in the fire controls contained in the Trigger Unit Casing, however in see these two images of the bolt, even without getting a micrometer and measuring everything, the bolt is different as well:
(https://imgur.com/3CpTeoJ.jpg)
(https://imgur.com/svR7HlM.jpg)
While I am still very much inclined to believe that the issue was the defective FPBs, it is still worth noting that the differences are not exclusive to the Trigger Unit Casing.