300blk marks ejection

[nickmoon]

Hey all, finally took my SBR 300blk out and noticed immediately these marks at ejection?
Can anyone give me some idea what is causing this? Obviously the brass is hitting here but why?

Its an AERO built by Curt's in Milwaukie. Did not have a single failure of any kind. Cycled great.

Thanks guys! I yield to your wisdom!
Nick

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[Velzey]

It's deflecting the brass just like it's designed to do.
It does look like it's doing it rather violently. I would recommend an adjustable gas block so you can bleed off some of the extra gas and lesson the impact.

 

[v0lcom13sn0w]

thats the badge of honor. means youre honoring your weapon by shooting it.

 

[bigezfosheez]

Yeah, just about had a heart attack when I saw the same marks on my POF P308.

Turns out, that hump has a purpose and it was serving it well.

 

[F2CMaDMaXX]

Yeah, i don't have Velzey's experience, but i know that area on my AR is pretty beat up, that lump is there specifically for this reason though.

 

[nickmoon]

Thanks for the input guys! It's sure fun to shoot so I'll keep on shooting it!

 

[Mikej]

My AR was denting the brass on the deflector. Not enough to affect re-loading I don't think, but still.. I took a piece of adhesive backed velcro and cut it to shape and put it on the deflector. You wouldn't even notice it's there if you didn't look right at it. Black on black, and dents no more.

 

[nickmoon]

My AR was denting the brass on the deflector. Not enough to affect re-loading I don't think, but still.. I took a piece of adhesive backed velcro and cut it to shape and put it on the deflector. You wouldn't even notice it's there if you didn't look right at it. Black on black, and dents no more.

Thats a good idea. Thanks!
Nick

 

[Caveman Jim]

What does the brass look like, is the mouth dented at all?

What Mikej said, I do the same.

 

[nickmoon]

All Brass looks good. Might be time for adjustable gas

 

[Caveman Jim]

My piston AR was slamming the brass so hard (deep dents in the cases) it was deflecting at 1 o'clock not 3 or 4 o'clock. A member here suggested a Tubbs flat wire buffer spring and it did the trick!!!!

308 said "I found with all the dinking around with my ARs I've neglected the recoil springs and buffers, so I happened on that video and ended up buying the Tubb Precision AR-15 CS Flatwire Buffer Spring and some new Spikes Tactical Buffers. I noticed my recoil springs had sagged, and the buffers were not the same. This explains some odd recoil and ejection problems I was having. I hope to test them out this weekend.

As far as your brass with the dents, it's your call but "I" probably wouldn't use them for reloading since I have plenty of others to choose from."

Tubbs:
Tubb Precision AR-15 Stainless Steel Buffer Spring (Fits both Carbine and Standard length stocks)

Buffers:
http://www.brownells.com/rifle-part...ndard-buffer-sku100-008-580-42451-100405.aspx"

Thanks 308!!!!