Gotcha, if it was me I'd let them have that one back.  You've done your due diligence, and even if you swap enough parts to get it to run, will you ever have confidence in it?

You got me there.  I'll just go enjoy my AI rifles at 1k.....

It has a recess for the recoil rod. I've taken it apart a couple times now.



I think you are right. I'm going to re-install the Zenith extractor and and take the free return / credit.

I've had great luck with ptr with a fullsize and k.  The welded optic mount is a plus(to me), mlok handguard that has proven stable for ir laser, and US made.

As I'm sitting here next to my wife, seat reclined and i have a full sized mp5 in my lap while watching tv.

I see this.
I showed it to my wife "see perfectly normal!"

I want a normal neighbor like you.  
Guys across the street: California.
Neighbor next door: green party
Other neighbor: a stupid bitch

Me:  the only normal one.

My temptation is to get a MKE AP5-P
https://atlanticfirearms.com/century-ap5-p-HG6035ab-n

Ultimately the disposable funds would be better spent on big ranch hand style bumper for my F150.
https://steelcraftautomotive.com/i-30497704-hd-replacement-front-bumper-semi-gloss-black.html

I know the pain, jeep wrangler owner and a cabin cruiser (boat) owner.

I need a windlass, and power trim tabs for the boat.
$300 to fill it with gas.
I just spent a few hundred on some towables for the boat... lol

The jeep needs to be regeared because i put 35in tires on it and a lift.
Air lockers with that, while I'm there and stuff.

So i own Break Out Another Thousand
And Just Empty Every Pocket

Last year i already put offroad bumpers and a winch on the Jeep.

I have been thinking about lots of pews i want right now, but I gotta have priority's.

I avoid going in gun stores right now.  

Lol I also own a Jeep and have a lease on a boat slip at the local Marina.

Just paid for another year on the lease - $1600.

I share a pontoon boat with a friend, we put a new / used 90HP Johnson Motor on it. My cut of that was about $1k.

I too could stand to put gears and lockers in my Jeep.

Wait until after this weekend.  I'll give you an update on mine with non-HK mags and 124 gr. Winchester ammo.

ETA:  It will be suppressed with an 80° locking piece.

This boat has my first I/O (mercruiser), outboard engines are so much simpler to deal with.
I spent way more than 2k (about 4k) this year just getting it ready for this summer.
And i still need to pull the engine once more due to an issue with the exhaust Y...


And for those going "just get a sp5", some of us have priorities.
I also like tinkering with shit, it's fun and frustrating... lol

I also like how the mkes have the front pin.

I would be happy with that bolt gap. Remember, as it wears, the bolt gap decreases. A measurement at the large end of the spec gives you more room for wear before you have to add plus rollers when it gets to .008

Buy it. I only ran 100 rounds using cheap plastic mags I bought off the EE and not a single issue.

Nice!

Another 100 flawless rounds with the AP5-P and cheap mags.  I loaded the mags with 10 rounds, 20 rounds and the full 30 on both trips out.

Only complaint is the gun gets a little warm when it is over a 100° out.  

I got one on order.

Both of mine with OE Mags (KCI) and Federal 124 FMJ
Ran perfectly well today,
I had an extractor on hand, and more Copper Springs and Black Springs
Didn't need them ran perfectly well....  

Until on the k model. I tried some of my 115 WWB... on the fuller size it just worked never tried 115 in it.
Nope... just NOPE it failed on the second round of that crap. one of them was a death sentence in the real world I would have been displacing and covering with my tried and true glock!
that round was STUCK between bolt and carrier. could not retract the bolt, had to remove the stock and to get the spring pressure off, it was VERY stuck... no idea why... pried stuck case out, and... a roll pin fell out... a small diameter very short one... like the ones in the recoil guide rod...  the FRONT of the recoil guide rod. where suddenly BOTH roll pins were missing. other end roll pins present and accounted for.

W
T
F?

So back to 124 Fed... and... stoppage halfway through mag 1, last two rounds of Mag 2....

Put in a Black spring and it ran like a champ for the record I used the book method to install it.

I tested all the mags I had with me, the OE Shiny KCI mags and a dry park KCI mag, I did not have any Hk mags handy.

Suppressed or open it ran great.

On a separate note. I had my M92 Zastava I built from a 0 kit YEARS back. with a Dead Air Wolverine, OLD Russian 122 Gr, Newer Russian 122 Gr, Heavier Russian Soft Point don't remember the weight, all steel case... Short Stroking, not even far enough to eject or pickup the next round but far enough to reset the hammer, none of it worked so I had a box of Winchester Brass. from work. and.... same issue. I need to try some of the Subsonic! LOL

Everything else ran flawlessly.

Need to get an Ejector, to swap in for no earthly reason I suppose. Maybe it would help the 115s.

Added a brace.  Still no issues.

Post a vid when you get yours!

just scored one too and had issues with the oem zenith mags and an overwatch precision mag seems to remedy the issues i was having with random rounds getting crushed

My recommendation - trash can the Zenith mag and get some MKE and HK mags.

Make sure the gun runs - blast a couple hundred rounds through it with quality mags.

So in building my SD clone on a Zenith receiver I discovered that I had massaged the Mag Well to fit snugly an Hk Mag.
ALL mags save for Polymer fit kind of sloppy (front to back)
inducing malfunctions. I massaged the magwells on my Zenith ZF-5 and ZF5-P and now both run with all mags and even 115s...