AR FTF issues...

[SkyHawk]

The bullet damage is from manually extracting/ejecting and would never occur during normal operation as the bullet would have left via the barrel instead of the ejection port.
The case dents are from the carrier and are normal.
Those dents get removed when the case is fired.


ATK runs the lake city ammo depot.
ATK also owns the federal brand.
Just make sure the ammo has the nato cross on the headstamp and it should be proper 5.56 ammo.

But that round sitting on top of the mag is mangled, badly. It is the first thing I noticed. That don’t look normal to me, and it aint buffing out either r

The jacket has been shaved in the forward direction, so it is happening when the bolt is closing. I am of course assuming the round on top of the mag was never chambered/extracted/ejected - I am assuming it was found like that when he dropped the mag before extracting the chambered round. But there is not enough info provided so who knows.

Never seen anything like it, that is why I wondered if the mag is sitting too high or there is some nasty burr on the bolt carrier.

[ar15barrels]

But that round sitting on top of the mag is mangled, badly. It is the first thing I noticed. That don’t look normal to me, and it aint buffing out either r

The jacket has been shaved in the forward direction, so it is happening when the bolt is closing. I am of course assuming the round on top of the mag was never chambered/extracted/ejected - I am assuming it was found like that when he dropped the mag before extracting the chambered round. But there is not enough info provided so who knows.

Never seen anything like it, that is why I wondered if the mag is sitting too high or there is some nasty burr on the bolt carrier.

That top round was put there after the bullet damage occurred.
That bullet damage did not occur while the round was IN the magazine.

The shaving of the bullet occurs while the live cartridge is extracted from the barrel extension.
The bullet catches on the sharp edges of the barrel extension's lugs.
The ejector pushes the bullet into the lugs.

This does NOT occur when a round is fired because the bullet exits the action through the bore.

[OlderThanDirt]

[OlderThanDirt]

...

[ar15barrels]

I had a Stag AR that had the same problem; deformed/dented casing and having to slam the forward assist after every round. It would not function properly with anything but good quality ammo. No wolf, no aguila, etc. After several hundred rounds of decent ammo and numerous cleanings the problem resolved itself.

That's exactly what happens when the gun gets all broken in.

[Redeyedrider]

The only FTF issue I ever had with an AR was a loose castle nut. Because it was loose, the buffer tweaked during fire and the bolt carrier dragged, creating a feeding issue. Once I tightened up the castle nut (and staked it) the problem never came back.

[Redeyedrider]

Use better ammo.

Use a different magazine.

Load your mags only half full.

liberally oil the bolt and carrier......

...... or buy an AK and don't worry about any of the above

[SkyHawk]

That top round was put there after the bullet damage occurred.

You are probably right, but who does that, and why? Who puts a janky round back in the mag (Wolf ammo buyers??)

I am confused

[ar15barrels]

Who puts a janky round back in the mag (Wolf ammo buyers??)

Asked and answered...

[SomeGuy75]

That top round was put there after the bullet damage occurred.
That bullet damage did not occur while the round was IN the magazine

[ar15barrels]

Actually, that’s exactly what the mag looked like, with that top round in that exact position, when I dropped the magazine. I’m no AR expert, but I’m not a complete retard either lol. I’d never put that round back in a magazine.
This was my third time though, using a third 10 round PMAG.

In order of events:
1. Set loaded mag and chambered a round
2. Pull trigger, round fired, spent casing ejected and next round chambered.
3. Pull trigger...nothing
4. Drop the mag and see this
5. Manually eject live round from the chamber and see it has similar damage.
6. Swear, a lot
7. Take pictures for Calguns

That bullet damage did NOT occur while the round was fully seated in the magazine.
At some time in the process, that mag was up in the action and then went back down after you removed the mag.
I note how the cartridge is overlapping the front of the magazine.
That's not possible without the round having been pushed partly out of the magazine.
The top round sits to the REAR of the magazine when a magazine is sitting in the magwell under the carrier after cycling because the carrier pulls it back while cycling.
To be forward, additional manipulations have occurred.

What did you do with every other live round that you hand ejected between firing the single shots?
Are those rounds still on the bench where they fell?

[Jimi Jah]

Looks under lubed. The charging handle is dry, I coat mine. I also manually break it in by exersizing the action.

[Redeyedrider]

I's like to see the underside of the upper and get a peak at the BCG condition.

[RamsEye]

I think under lubed too. How about the cam pin,bolt and carrier. do they slide smoothly when out of upper.
And I too manually cycle action a bunch and use snapcaps to smooth trigger, action spring and most of all the bcg.
A few mags of snap caps and manually cycling got my new build to lock up properly but at first lube and test it didn't want to lock up.