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Yup.

Speer gold dot 124gr seems to run well in all of mine, but anything with a flat point doesn't seem to work 100% reliably in all my guns.
 

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You are having the exact issue I am having. So what ammo can we use on this thing? I haven't had any issues with FMJ at all.
I just got my second pistol back from Zenith. I hand cycled some Gold Dots through it and it seems good to go. It appears like all they need to do is some minor alteration with the magwell angle and it makes the thing feed much better.

My first pistol fed Gold Dots and Critical Defense flawlessly after having the magwell adjustment.
 

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MP5s have always had issues feed JHP ammo, that is nothing new.

I'm not sure what teams you have been on, or what your experience is with real HKs, but all of mine, including issued weapons, have fired hollow point ammunition without any problem. My Dakota Tactical builds have zero problems either.
 

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I am having similar FTE problems with my new Z5-P. This seems to be more than am "isolated" incident. I was using ZQI 125 grain ammo.
Welcome to the site. With my MKE RS I started out with a few hundred rounds of 124 S&B and she ran beautifully. I then went to 115 without a hiccup. I was using German HK mags and have not yet tried the MKE mags but will soon once the snow melts here. I suggest trying different mags, different ammo and also, make certain you are not relaxing your grip as a limp wrist situation could cause a FTE on new arms.
I will say this, I had an issue with a cracked case insert and Zenith took care of me very well and very professionally. If anyone has any real issues they will step up and take care of you. However, remember, they are made for serious, hard core use and when new out of the box, all SMGs can be stiff, at first. Clean it well, inspect the ejector, bolt and carrier and run it, run it, run it and within a few hundred or a thousand rounds, they all should run on anything, provided there is not some unseen issue.
I'm pleased enough with my MKE that I am looking forward to another, unless HK releases their unicorn soon.
 

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I am having similar problems that others(including the OP) in this thread have had that include empty casings falling into the trigger module/lower and causing jamming that requires one to disassemble the equipment to remove the shell casing. Multiple magazines,USA made(from HK Parts), MKE/Zenith and HK (both new and used), were used with similar occurrences. It seem that the majority of the earlier posters that had similar problems had to send their equipment back to have the magwell alignment corrected and/or other parts replaced.

What I am saying is that I believe that this is not an "isolated" problem. I am not saying that the Zenith is junk, but there sure seems to be more owners with issues than would account for "one bad egg." While I expect that Zenith will make the issue right, this should be inspected/corrected before shipping. It they built a "jig" to correct this, or think that simply bashing the well and damaging the finish solves the issue, then this problem is a bit more than a few weapons. I am not saying don't buy a Zenith, but be aware that you might be sending it back for work that should have been discovered during an effective QC program. If you put out a high quality product, you don't have to "step up and take care of the customer." Caveat Emptor.
 

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YewtawKid, The sarcasm isn't really needed. It is good that you are facile with guns, but sometimes folks come here with a first post and don't have much experience. estesmonkey was just trying to help. If you had included the information in your first post that was in your subsequent post, your experience level might have been more obvious. We are a community here and good manners are just that...good! :)
 

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Yo, instead of bitching on the forums, why don't you engage Zenith about the problems you are having. Their customer service is top notch and I'm sure they will remedy the problem.
 

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Yo, instead of bitching on the forums, why don't you engage Zenith about the problems you are having. Their customer service is top notch and I'm sure they will remedy the problem.
Aren't we polite today? Why don't you keep your negative feelings to yourself and not post. I didn't start a new thread because this thread had several occurrences of a similar problem. Using customer service and having to return a weapon is no excuse for poor quality control. Others should be made aware that they might have to return their weapon for it to work correctly.
 

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Aren't we polite today? Why don't you keep your negative feelings to yourself and not post. I didn't start a new thread because this thread had several occurrences of a similar problem. Using customer service and having to return a weapon is no excuse for poor quality control. Others should be made aware that they might have to return their weapon for it to work correctly.
I have to agree with chip though he may not have been absolutley politically correct, the proper order would be to contact the importer first and give them a chance to make things right. Then if if they haven't done the right thing, tear them up all you want on the boards. I admit I have jumped the gun and flamed companies without giving them a chance but it ain't right. In this case Zenith has taken care of every single issue I have heard about until the buyer was happy without fail. I had a cosmetic issue with my first one and one week later I had a replacement that was just incredible. In a way I'm glad I had to send the first one back because the replacement was sooooo nice. Perfect in every way and awesome looking welds. I am a welder myself and I even think they look perfect. Anyhow, give them a chance and you won't be disappointed.
 

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Noob question: Does the firearm still have to be shipped to your FFL after warranty work since you've already taken delivery and filled out the 4473?

I've had mine for almost a month but have yet to shoot it. I really hope mine doesn't malfunction to the extent of the OP's.
 

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Noob question: Does the firearm still have to be shipped to your FFL after warranty work since you've already taken delivery and filled out the 4473?

I've had mine for almost a month but have yet to shoot it. I really hope mine doesn't malfunction to the extent of the OP's.
No they will ship it directly to your door.

Sent from my SM-G925V using Tapatalk
 

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I am having similar problems that others(including the OP) in this thread have had that include empty casings falling into the trigger module/lower and causing jamming that requires one to disassemble the equipment to remove the shell casing. Multiple magazines,USA made(from HK Parts), MKE/Zenith and HK (both new and used), were used with similar occurrences. It seem that the majority of the earlier posters that had similar problems had to send their equipment back to have the magwell alignment corrected and/or other parts replaced.
I purchased a Z5-RS from Atlantic Firearms during the recent sale and took it to the range today. My goal was to run a few magazines through to confirm reliability prior to submitting a Form 1. Unfortunately, I also encountered the same problem with an empty shell casing falling into the trigger pack and disabling the firearm. As I was not able to disassemble the weapon on the range, it put an early end to my range session. Looks like I'll also be contacting Zenith and Atlantic in the morning...
 

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My gun does the exact same thing the OP posted when I shot aluminum cased 9mm. FTE's and smashed casings by the bolt. So far all brass 115gr works fine. I'll save the aluminum for my Glock.
 

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while i dont have the rs model, i have the z5-k and since getting it new in January from Kelly Enterprises i havent had a single issue. First day having it i ran about 500 rounds of different ammo, including tula 115gr, federal 115gr, winchester 124gr, and some other 124 gr i dont remember the brand. I didnt have any issue and still to this day about 1000 more rounds have went through her without any FTE or double feed issues. The rounds always extract. The only issue i have is that the bolt doesnt stay locked back after the last round. I only have the mke mags that came with it so i havent been able to try out other mags yet.
 

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My Z5-P has always run reliably. Never fed it steel, aluminum. Fwiw, I always break in my subgun knockoffs with NATO spec ammo for the first 300-500 rounds. Only failures have been with the straight mags and flat point ammo which is a known questionable mix.
 
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