BUmmedic

It's been all quiet for a bit now... I have an open ticket without response regarding the BCG and receiver wear. I have a Tubb spring coming this week, but it'll be a bit before I have a chance to test it out. I'm hoping that helps. As others have said, it seems to run fine, and maybe I'm making a mountain out of a mole hill.

Here are some additional pics. First are buffer and spring, now that I look at it, maybe 26 coils (if I'm even counting correctly). 11.25" long. Buffer 2.5" and 3.8 oz. Other pics show spring out, buffer in, and carrier placed on top and bottomed out. Shows clearance between carrier and receiver. So unless the buffer end is impacting the tube and compressing, there shouldn't be impact between the carrier and lower.

Read up on them... will probably be the first thing I'll try once I hear back from Aero. Thanks!

Honestly, for the price I paid for all the parts, I can't complain, but I guess for extra I could have tried to get the peace of mind of a factory build, but I've seen bad stuff happen with those, too. At least I'm learning a ton by riding this wave...

What have I gotten myself into? :-P

Well, due to the abnormal wear on the lower and upper, it looks like Aero may want it back for warranty/repair, so I'll let you all know what they say. I'm waiting for CS to respond to my open ticket.

Thanks for all of the excellent info... I will post a pic of my spring the next chance I get. I may very well be counting the coils incorrectly, but from what I have read about coil counting (yes, I looked it up), then it may actually be less than 27. Does the material at the end of the buffer actually compress? Read somewhere about Sprinco springs (the ORANGE one, in particular)... found a couple forum threads that made me question its utility... "flavor of the month" was a term I read. Oh well, I'll post a pic of my spring and maybe it really is a couple coils short despite the length being ok.

Best as I can measure: 1. 7" 2. 2.5" and 3.8 oz 3. 11.25" and 27 coils

But if the carrier doesn't contact the lower with only the buffer sitting in the tube, I don't see how live fire would allow it to go further and make contact unless every shot is allowing the buffer or tube to compress or elongate and plastically deform and rebound (I'm not a physics or engineering major, but something tells me a 7075 mil-spec tube won't do that). If it will, please someone school me... I've always been a good student.

Maybe I spoke too soon?

Saw these peening marks on the rear of the lower also on either side of the buffer. Cerakote is being stripped away a bit. Definitely impact marks. No noticeable damage to carrier body.

Thanks! Can't wait to get it back out there again!

Ha ha! Love it!

I don't care so much about the port, it's the case head/ejector swipes and forward ejection pattern that initially got me questioning. The port wear was just an after-the-fact finding. I get that the cases are striking there and the deflector, which is what I expect them to do.