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Ddub711

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    Davenport
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    Iowa
  1. Ddub711

    .300 Blackout Pistol Issue

    I did have the ejector apart at one time and there weren't any brass shavings in there. This was my thought the first time i had the problems with it. Thanks
  2. Ddub711

    .300 Blackout Pistol Issue

    Alright everyone, i installed the new barrel and gas block. Used a dimpling jig to set the gas block. My function check at home went better than i expected. I cycled two full mags of different brand ammo and the gun cycled perfectly. Went to the range last night and shot 125 rounds (i know its not a lot but it started to get dark since i went after work) and the gun functioned perfectly. Absolutely perfect. Thanks for everyones advice! My next step is to put all the parts from the original gun back together since now ive replaced everything. There is literally nothing on the new gun that was original to the old. It makes me sorta sick but, ive got a pretty nice AR pistol now. Ill get it back together and see how it functions. With any luck, the gun will run just fine and ill have a little beater gun. Once again, i appreciate the fast and accurate responses!
  3. Ddub711

    .300 Blackout Pistol Issue

    I absolutely appreciated your advice! Im open to everyone lol even the guy 'smarting off"
  4. Ddub711

    .300 Blackout Pistol Issue

    That's exactly the information i got, thanks for confirming! You guys have given a ton of good information! Thanks
  5. Ddub711

    .300 Blackout Pistol Issue

    I ordered a .300 blk, 7.5" Ballistic advantage performance series barrel and a new gas block and gas tube. They should be here Thursday. For the hell of it i also ordered an SBA3 brace, lol if im ordering stuff i might as well get something cool to! Ill get all the parts installed and head to the range Friday after work to see if that was the problem and keep everyone updated. I might get a barrel reamer like Rampy suggested. If nothing else i suppose that'll give me some insight on the chamber size and if its small/big. Ill see if i can get my hands on a go no-go gauge also. Thanks everyone for the input and if anyone else has any other suggestions they'd be welcome. I also think i forgot to mention that when cycling live rounds there is a small dimple on the primer of the round. It's apparently light striking each round. I did a bit of reading and what i found was its a somewhat common thing because of the firing pin/bolt design, paired with the hard primers in .300blk and .223/5.56. I've never had any issues like this with any other build or rifle so maybe you guys can shed some light on that also??? It has me a little wigged out and maybe that plays into whats going on somewhat with the rifle.
  6. Ddub711

    .300 Blackout Pistol Issue

    Unfortunately, i do not. But, for the sake of knowing, i might see if i can borrow one. Ill actually bring the rifle with me when i pick the new parts up, i'm sure he's got one. Great tip. I thought about it but like i said, i don't have a go no-go gauge. Thank you!
  7. Ddub711

    .300 Blackout Pistol Issue

    My plan was definitely to suppress. Good advice, thank you. I haven’t done a whole lot of research on it yet. Thanks again for your help. I appreciate it!
  8. Ddub711

    .300 Blackout Pistol Issue

    Just talked to my gun guy and he’s got a ballistic advantage barrel and gas block, same size and caliber in stock. I’ll probably go that route, and put the old stuff back together to see. Your right tho, I suppose I could come out with two working guns!!
  9. Ddub711

    .300 Blackout Pistol Issue

  10. Ddub711

    .300 Blackout Pistol Issue

    I definitely didn’t want to dive into switching stuff out right away but, I got a good deal on the aero receivers and decided to do it I guess. As far as I remember, the gun functioned fine. It definitely didn’t run the way it does now. Like any new build (or in my case, changing parts over haha) your first few mags, your really paying attention to how the gun fires. I honestly never thought that the barrel would have a problem running in a different receiver but that’s the only thing left on the gun. It has to be that.
  11. Ddub711

    .300 Blackout Pistol Issue

    Ok so that was my next question. I don’t need the best barrel ever, but if a psa barrel is $80, would it be worth it to spend a couple bucks more for a faxon? I’m considering a new gas block and tube also. Worth it? It seems super odd that this issue would come up after switching receivers. Are there actually barrels out there that are specific to polymer receivers? Has that been the issue this whole time? I suppose American tactical could very well have produced a barrel specific to their receiver. Just seems weird they’d do that I guess.
  12. Ddub711

    .300 Blackout Pistol Issue

    I used a red, brush on sharpie and hit the contact points. Honestly, everything seems in order. None of the marker is rubbed off any more than anywhere else on the lugs. Im seeing everywhere it contacts the extension and inside the chamber. I cycled 6 rounds through the gun with the marker on there and at 6 rounds (with a full mag) i had to pull SUPER hard on the charging handle to get the BCG to pull back. Once again tho, none of the marker is rubbed off hardly at all. It cycled fine until the 6th round, once i got it pulled back, i locked the BCG back, pulled the mag and opened the gun up. Nothing looks out of the ordinary... It has to be the chamber on the barrel, somehow, right???
  13. Ddub711

    .300 Blackout Pistol Issue

    Well, I feel a bit better. I was sensing a bit of sarcasm and rudeness and i stand corrected. Thank you for clearing that up.I was told this forum is one of the best and there are no judgmental people, just people giving good advice. This is my first post on here and i totally mis-judged the responses. My bad. Anyway, I absolutely did NOT expect to have these issues or i definitely wouldnt have bought it. Especially since, ive basically built a new gun since the barrel, gas system and BCG are the only original parts... I had the gas block and tube off this afternoon after the range. There was greenish white oxidizing under the gas block, similar to the color i saw on the bolt after the first time i cleaned it, after the receiver swap. It is a 7.5" barrel with pistol length gas system. The gas block is two set screws, with a dimple in the barrel, aaaaaand its got a drilled taper pin that is also notched on the barrel. It is very unlikely that the gas port isnt lining up with the gas block. I do have an entire drill index to check port size. The port on both the gas block and barrel were clear of any obstructions. But it is quite suspicious that there was any build up of carbon under the gas block. The gas tube was also clean. I agree it definitely sounds like a gas issue but, correct me if im wrong, gas issues wouldnt have anything to do with cycling the gun in my basement without shooting it, right? haha im usually good at figuring these things out but this gun has given me nothing but troubles and i think im starting to get a little burned out. I had to really hold my composure at the range today when it was pulling this crap...
  14. Ddub711

    .300 Blackout Pistol Issue

    Everything except the barrel and bolt carrier group has been replaced. Im not getting any brass shavings anymore after removing the o-ring. Im fully aware that the o-ring has nothing to do with the gas rings, i guess i should have put a period or comma between those statements. I shot the gun after removing that o-ring and thats when the brass shavings stopped, so when i said its not a big concern anymore, thats because it isnt doing it anymore. A small amount of brass shavings is not a major malfunction, its common with new guns. Even though this is the first time its happened to me, ive talked to many people who've had that problem and its never been an issue. Like i said, the o-ring in the extractor was putting to much pressure on the casing, making brass shavings. Every spent casing i picked up had a burr on the rim, once the o-ring was removed, no more burrs. Most of the expensive BCG's ive bought, dont even come with an o-ring in the extractor..... As far as head spacing issues or an out of spec chamber, thats where i was leaning. It is possible that the barrel is meant to only be used with a polymer receiver, i was just coming on here, like i said, for a fresh perspective. I know the gun was cheap, its a budget build. I got a good deal on a gun and im trying to make a beater out of it. I dont need to be reminded that its a cheap gun, ive got plenty of high end ones, bud.
  15. Ddub711

    .300 Blackout Pistol Issue

    Its also my opinion that the brass shavings are of no concern now. Just getting the full story out there. It seems like the BCG isnt fully seating around the casing. Also, ive tried multiple different BCG's and the problem seems the same. Its almost like the round is getting stuck in the chamber or the bolt is hanging up inside the chamber every once in awhile..
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