Ideas why I've got poor shot dispersion from CZ Scorpion?

[Circle_10]

Regarding the original problem of the thread protector coming loose, HB Industries makes this:
https://hbindustries.net/store/shop/...vo-ultra-comp/
It’s a muzzle device with an integral 1/2x28 thread protector. After reading this thread I wondered why nobody had made basically this exact thing to address the problem, and lo and behold it turns out someone has.
$60 and out of stock of course, but it exists.

Personally I’m wondering if you wanted to just keep using the factory muzzle device, if there is any particular reason you couldn’t just remove the troublesome 1/2x28 thread protector entirely and just use like a short strip of heat tape around the 1/2x28 threads. The factory 18x1 flash hider would still protect them from damage and the tape would serve to keep fouling or whatever out of them.
Just a thought.

EDIT: I don’t think I meant “heat tape”. I think I meant that aluminum tape used on heating ductwork.

[SteyrAUG]

No, this is common with 9mm PCCS. My Cx4 does the same thing. Quite accurate with 115 and 124, not so good with 147 grain stuff. Nothing wrong with the Colt.

Mine and every other one I've ever shot must be special then. We shoot a lot of 147 gr. JHP and the performance is probably slightly better.

[ABNAK]

Regarding the original problem of the thread protector coming loose, HB Industries makes this:
https://hbindustries.net/store/shop/...vo-ultra-comp/
It’s a muzzle device with an integral 1/2x28 thread protector. After reading this thread I wondered why nobody had made basically this exact thing to address the problem, and lo and behold it turns out someone has.
$60 and out of stock of course, but it exists.

Personally I’m wondering if you wanted to just keep using the factory muzzle device, if there is any particular reason you couldn’t just remove the troublesome 1/2x28 thread protector entirely and just use like a short strip of heat tape around the 1/2x28 threads. The factory 18x1 flash hider would still protect them from damage and the tape would serve to keep fouling or whatever out of them.
Just a thought.

EDIT: I don’t think I meant “heat tape”. I think I meant that aluminum tape used on heating ductwork.

I got a 9mm 1/2x28 FH which will screw onto those threads, no need to "tape" them up. Inside the box is another protector to cover the bigger threads (18x1) that sit behind the 1/2x28.

[Circle_10]

I got a 9mm 1/2x28 FH which will screw onto those threads, no need to "tape" them up. Inside the box is another protector to cover the bigger threads (18x1) that sit behind the 1/2x28.

In my case I don’t have any 1/2x28 9mm flash hiders laying around and was just going to use the factory muzzle device until I’ve shot the gun enough to decide I like it enough to start buying other accessories for it.

I’ve kind of accelerated my usual purchasing timetable with regard to buying mags for it, for obvious reasons but I generally wait on buying widgets for new guns until they’ve proven to not be a lemon/POS. I once made the mistake of buying a ton of accessories for a gun that turned out to be unreliable and ended up regretting it.

[PracticalRifleman]

Mine and every other one I've ever shot must be special then. We shoot a lot of 147 gr. JHP and the performance is probably slightly better.

My Scorpion prefers 147gr ammunition. My buddy’s prefers 115gr. I haven’t seen a Scorpion yet that shoots anything poorly, outside of when those flash hiders come loose, and the one that had a loose barrel.


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[ABNAK]

Okay, replaced the factory FH and that stupid little nut underneath it with a 9mm AR-style FH. Finally it groups! Zeroed the Vortex Razor RDS at 25yds from the bench and was getting perhaps a little over 2" groups (of course my astigmatism doesn't help when you see one red dot birthing another!). Used 115gr FMJ. So finally I gave it a good cleaning and next time out will zero the Ranger-T 147gr ammo I intend to use in it.

[Circle_10]

Okay, replaced the factory FH and that stupid little nut underneath it with a 9mm AR-style FH. Finally it groups! Zeroed the Vortex Razor RDS at 25yds from the bench and was getting perhaps a little over 2" groups (of course my astigmatism doesn't help when you see one red dot birthing another!). Used 115gr FMJ. So finally I gave it a good cleaning and next time out will zero the Ranger-T 147gr ammo I intend to use in it.

I’ve still barely shot mine, but I was able to at least take mine out and function test it. It grouped pretty decently at 50yards, except it was hitting about 4” left. And of course I happened to not have anything on me that was small enough to depress the decent in the rear sight to correct the windage. So, next time I guess.


One thing though...there seems to have been some buzz lately about the Scorpion’s apparent ability to fire out of battery. The select-fire Scorp apparently has a sear mechanism to prevent OBDs. However the ATF nixed that part being included in the semi-auto S1 Scorpion as they apparently constitute “machine gun” parts.
There is still another mechanism that mitigates the risk of OBDs however and the S1s do have this - a Firing Pin Block. However it seems that there have been some off and on issues with this part being out of spec so checking yours to ensure it is functioning properly is a good idea.

https://imgur.com/a/SPD7RCv

Even with a bad Firing Pin Block a Scorpion might run for thousands of rounds without issue though, until suddenly it doesn’t.
Bump firing and binary triggers can apparently exacerbate the risk, but from what I’m understanding *currently* these issues are probably occurring in guns that, unbeknownst to their owners, had these faulty firing pin blocks.

[ABNAK]

I’ve still barely shot mine, but I was able to at least take mine out and function test it. It grouped pretty decently at 50yards, except it was hitting about 4” left. And of course I happened to not have anything on me that was small enough to depress the decent in the rear sight to correct the windage. So, next time I guess.


One thing though...there seems to have been some buzz lately about the Scorpion’s apparent ability to fire out of battery. The select-fire Scorp apparently has a sear mechanism to prevent OBDs. However the ATF nixed that part being included in the semi-auto S1 Scorpion as they apparently constitute “machine gun” parts.
There is still another mechanism that mitigates the risk of OBDs however and the S1s do have this - a Firing Pin Block. However it seems that there have been some off and on issues with this part being out of spec so checking yours to ensure it is functioning properly is a good idea.

https://imgur.com/a/SPD7RCv

Even with a bad Firing Pin Block a Scorpion might run for thousands of rounds without issue though, until suddenly it doesn’t.
Bump firing and binary triggers can apparently exacerbate the risk, but from what I’m understanding *currently* these issues are probably occurring in guns that, unbeknownst to their owners, had these faulty firing pin blocks.

Thanks for the heads-up. I have the Franklin Armory binary in mine, so I'll have to keep an eye on it. It is, however, cool as hell!

[Esq.]

The one sample I shot had what I think is an incredibly crappy trigger. Not a fan.

[Circle_10]

The one sample I shot had what I think is an incredibly crappy trigger. Not a fan.

The triggers are pretty shitty although it didn’t bother me as much during actual shooting as it did when dry firing. HB Industries sells a trigger spring kit for like 10$ that I hear improves things a bit. Once I decide to start dumping more money into mine I may get one.