Why did you do that?
Also, what ammo is that? Looks like the nose is pretty flat. That could be the feeding issue.
Finally, what mag? That isnt a pmag.
The sled is free floating and is used simply as a charging handle. The gas system is essentially an AK system with an adjustable gas block and an ar15 bolt.
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Yikesā¦
Agreedā¦ the flat noses instantly caught my eye too
Psa ammo, aac.
I read about the 300 black out feeding issues in the AR platform mags. And if you cut those notch out, it doesnāt get caught up on the lip. I had 4 different magazines From PSA all the magpul 300 blackout specific magazines and none of them run it. only the lancer magazines run it flawlessly Now the last 200 rounds. thatās my fix. Unfortunately, itās not ideal for me or everyone.
Maybe its the angle, but that doesnt look like AAC ammo. Their AMax 300blk has a point.
And what specific mag is that? It isnt a magpul.
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Sorry about all of the irritating deleted posts by author! My phone was freezing up as I was trying to reply to several, then the format would be jacked up then it would not let me edit it, etc. Iām gonna stop commenting and just read 
Also not sure psa oiled my Jakl as it was bone dry and I think friction also played a part .
Those are subsonic Hornady loads. So a flat nose and low energy, youāll definitely need to open up the gas setting. Thereās a lot going on here, but the ammo and mags youāre naming arenāt whatās in the picture.
PSA didnāt oil the gun before sending it out, at least not to the level youāll want. But they do test fire.
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Thatās not AAC ammo, and that looks like a Lancer magazine @mikegoff29
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Yes Thatās what I Mentioned. I no longer use a Aac ammo as it would not feed right, I only use hornady now. Shoots itās fine. additionally, the lanser magazine is all that would work in my jackl. The aac ammo and magpul donāt work ā¦ which makes no sense. Because AAC ammo and magpul should work just fine. It is possible. I have a lemon jackal and everyone elseās works fine. I have not done any modifications any polishing. Nothing, just shot it straight out the box.
If you think it is a dud then PSA will fix/replace for free. Call their CS, do not email.
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Good evening all. I have not had the time to get back on here and explain what I found was the issue with my Jakl. It is actually the BCG. The BCG in a Jakl is slightly different than on a regular AR and thus when cycling, it comes into contact with the feed lips of the 300 blackout specific Magpul mags. If you file down the feed lips of the mags it runs flawless. Lancer 300 specific mags run great with no mods. Those mags are used to run subs, if I use standard 5.56 P mags, lancer, PSA aluminum mags, or any other mags with supers it runs flawless. So my advice is to check feed lips on all mags with Jakl 300 blackout.
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This sounds like the issue mine was having. Thanks for sharing
Not sure if this is a dead thread at this point but I have some observations that I thought would be worth sharing.
I have a Jakl in 300blk. Iāve had it run like a top and then Iāve had it not want to run at all.
First thing to consider is lubrication. I was originally using gun oil but Iāve since swapped to lithium grease for the Jakl. The reason being that there are a lot of contact surfaces on the bolt carrier and oil tends not to stay put. If you let it sit for a while it dries out pretty quickly and youāre going to have a bad time.
The second consideration is your magazines. I have found that the gap between the feedlips on a Pmag is 0.42-0.43 inches on average where the gap on a metal stanag magazine or a Lancer is closer to 0.45 inches on relatively new magazines. This combined with the surface texture difference and the heavier spring in the 300blk specific Pmags results in considerably more drag on the bolt as it tries to strip a round off and close the bolt. Try pushing a round out of a 300blk Pmag from the rear with your finger and you may see the rear of the round catch on the nearest feedlip and nose up to the left or right depending on which side itās stripping off from. I have not been able to recreate that same behavior in a metal feed lipped magazine. I have since swapped exclusively to Lancer magazines and grease in my blackout and it is a much more enjoyable experience.
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Welcome to the forums @bitterrootbrute 
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Welcome to the forum! Totally agree with grease versus oil in an open system. It stays put. In post #10 above, i have pictures showing where mine is greased (the sled seemed to be an inhibiting friction point too). Thanks for the input on mags!
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Grease is the word
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Seems to be a known issue with the feeding problems on the 300 version. Ive been wanting to buy a Jakl but waiting for PSA to fix this issue before i buy one.
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