What is your reasoning for what's happening with your feed ramps? > https://www.ar15.com/forums/AR-15/What-is-this-Colt-upper-/118-733761/

My problem isn't that this "polishing" is being is done, it's that it's being done so inconsistently by someone that doesn't appear to know what they are doing... It's very "hack gunsmith" looking.

Why this is being done is another question??? What qualifies one barrel to receive this "polishing" while other barrels leave the factory untouched?

Some mighty fine bubba gunsmithing at the inverted V In between the feed ramps right there, boy. And on my barrel which Cliff posted above (second pic) your monkey even cut into my chamber.  I'm a diehard Colt fan and all I buy is Colt, but if you guys can't get this shit under control I will be taking my business elsewhere. This very same extension feeds the M4A1 perfectly fine at 900 rounds per minute, but you felt the need to bubba gunsmith our barrels?

Please stop the insanity. Thank you.

I'll be 3rd.

Just stop hacking.

I have two 6920 Socoms that have the same issue. Looks like the mouth of a snaggle toothed hillbilly. Ill try to post pics when I get a chance.

I mean it is Colt... isn't their terrible QC kind of a meme at this point?

Apparently there’s some magical Colt fairy dust reasons for this! As I posted in the other thread between me and my buddy we have nine 6920’s between 6yrs old and a new 14.5” SOCOM I just got and they all have that grinding. They all run as expected but, come on Colt just tell us the why!!!

I already know why. They think its going to enhance feeding. All I want is for them to stop.

You know I'm not an unreasonable guy. If they wanted to polish my feed ramps that would be ok. But what this is on my barrel, isn't that. They are removing a ton of material, super uneven flat spots and peaks all over the place not even uniform on both sides. AND they ground into my fkin chamber from BOTH ramps. This needs to stop.

I'll have to check mine when I get home, I have two from 2012, one from 2018 and another that doesn't have a date, just a "42" where the date should be. With that said, I dont think I'd care one way or the other since they all feed just fine.

ETA: I just checked and the only one that has the Bubba job is the newest barrel, a 05/2018 marked 6933 barrel. This is also the barrel that came with the FSB canted so badly that I couldn't sight it in at 50 yards go figure.

Could it be possible that Colt sometimes uses up extra "rifle" barrel extension stock and simply hand grinds the M4 cuts into the extension? Coming from Colt, not much would surprise me.

Maybe but the only rifle they currently sell to the public comes with m4 feed ramps in it.  I don’t know about the m16a4 though.

Not likely. The hacking is up high, at the peak of the ramps.  A rifle extension would have to be hogged out low on the ramps as well.

Check out > this < video at Daniel Defense, they are doing the "polish" job at the 1:05 minute mark.

A very human error filled task from what I could see.

Looks to be a light polish/deburr, unlike the Colts.

Likely just the monkey running the tool at Colt.

Exactly.  Will look more like this bubba'ed up BCM that they tried to sell me a few years back and tell me that they were "polished".  
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THAT looks like ass.

I didn't think it was possible to get a canted FSB on something as high end as a Colt.

I guess that's why my 14.5 almost maxed out windage to the left on it's rear sight to achieve zero. Pathetic. Century shitbox WASR AKs have better aligned sights.

I'm a Colt fanboy, but I won't be buying anymore Colt firearms and I'll probably have to replace the barrel on my SOCOM because it looks like ass with that rear sight cranked almost all the way over.

It's very odd to have a canted FSB on a Colt rifle considering how they are installed.

I'm guessing the barrel extension was pressed on crooked. I installed a lo-pro gas block and the rifle runs perfectly now (I'd did originally but I couldn't sight it in).

I went looking for that pic.  

That was another Colt shit show. Too bad.

Eta: extensions are threaded on, not pressed.

It was a SOCOM barreled Expanse, but I had one that only left me 3-4 clicks of windage when sighted in.  I sent it back to Colt and they fixed it.

Fucking Colt

Shit.

You may need to make the change to Radical.

I may have to just get out of ARs altogether if it comes to that.

@Tigwelder1971 I can't help but wonder if Colt's elite unit of assembly chimpanzees have seen this thread or not. And if they have, why they won't respond.

@MILSPEC556

IF Colt even bothers to read postings here,  no response since I have joined.

The Radical joke was just hacking on you.

I used to have a CS contact at Colt, great guy and solid source of info, email comms dropped off ~ a year ago. Not sure he even works there anymore.

Colt is Colt. We buy it, things change. They're not pretty, they don't make he range crowd ohhh and ahhhh, but they work man.

The components that I'm buying now are pale in comparison to those 5 years ago.  Sad.

Interesting, I had no idea they were threaded on. Thanks for the info!

I was pretty pissed with that 6933 upper because I had to spend more money to make it right, but now that I did I absolutely love it. Went from the A2 sight and a MBUS rear to the MI free float mlok rail & lo-pro gas block and a MRO Patrol. Handy little "pistol".

Colt.  So YESTERDAY.

There are brands to spend your hard earned money on.

Both my SOCOM and IAR are like that but I might have 6-7 clicks left. No idea if it's worth sending them back to colt or not over.

The FSBs on both rifles are dead center to the rails and level. IDK what's wrong and I won't be able to get back to the range to try shooting them again for a while thanks to surgery.

Wow... I was a Colt fan-boy with numerous older AR-15s and four Colt M4 carbines and two of their AR-15A4.   I always knew Colt basically sucked in the QC department, as well as their CS and this goes back into the mid 90s when I had to return one of their brand new "Match" Target rifles for some minor work, which they didn't do since it was within "Specs."

As for my M4a and AR-15A4s, I purchased them between 2010 and 2015.  The last Colt Product I bought was in 2016, which was one of their 9mm carbines.   There were some serious uneven tooling marks on the left-side of the upper receiver.  I sent it back to Colt hoping that they would simply swap out the upper receiver, but they didn't because, again, it was within "specs."  Basically costing me another $200 to buy a new Colt 9mm upper receiver, but I forgave Colt for that.

It's sad, but after reading this, I basically desided not to buy one of their new "2018" production M4 SOCOM carbines with the pinned 14.5" barrels as a Christmas gift for myself, but I'll spend my money elsewhere since I'm not feeling the love from Colt or having that love... For Colt that I once had in the past, like back in the 80s.  The sad thing is that this even goes to their new 1911 series of pistols.  I was wanting to add a Rail Gun and an all steel Commander to my collection, but the ones I've seen had minor QC issues that shouldn't be on a $1,000 pistol.

The sad thing about this is that Colt doesn't care at all about their loyal customers since both their QC and CS departments have sucked for more than twenty-five years now...  Hell!!  I was going to buy one of their "M16A1" reproduction rifles earlier this year, but after inspecting it, I passed....  Even at the discounted price of $2100.  Even at that price, there where some factory visual issues like a non-Colt upper receiver.

Thank you all for posting this valuable information since its a very good reminder how "blind loyalty" really sucks.  And the sad thing is that Colt could "save itsself" by becoming Colt "again," which use to mean something, but I guess after twenty-five years of sucking, that has become their new normal business model.  Where I work, we're not buying anymore Colt M4s, but selected the Sig platform as a replacement since it's a better product and Sig ready wanted our business and worked for it...  In the old fashion way.

How is that fsb canted? I can't tell

This is a funny post because I remember people saying colt sucked in the 80’s and here you are praising that era..lmao.  People just love bashing Colt. Always have.  Also what’s with Calling people “Monkeys, Bubbas and Hillbillies”?  Damn people..

PLAINLY leans to the right.

Thanks had to look at it a second time. But this is the thread i was talking about and it's making me lean towards a bcm

Looked for the exact work on an Academy M4 rifle- screwed up feed ramps, serial number started with a CR- passed on it, bought another ARX instead.

The issue is not a Colt exclusive.

Probably the Russians sabotaging Colt's good name.

Then what issue is it

BCM are having plenty of their own issues.

Many AR companies have had the same issue.
PSA and Bushmaster are 2 that stand out.

It could happen with any. I can't think of one that would not fix it.

Out of 9 Colts now,  I've not had an issue.

BCM didn't want to fix my issue with the above posted upper.  They kept it, would not replace it, and wanted to charge me a restocking fee.  The issue was referred to my credit card company for a chargeback.  I will never use BCM again bacause of this.

What issues do they have? More than colts? I'm not aware of bcm having alot of issues like colt

That's unfortunate to hear

That’s Colt edgebreaking the feedramp, not polishing. Now how some of them missed entirely is a whole seperate question....

A lot of rifles lately that won't run, or won't run right.

Why do people keep buying colt when they have so many issues?  I've got an FBI bbl on order, hoping its not Bubba'd.  That will most likely be my last colt purchase.

Just got a 14.5" today with the "magic touch".  11-08 dated. At least it's minor...

Yeah, certainly uneven, but at least they barely touched it.

Yeah, I can live with it.

My recently acquired AR15A4 and 6920HBPW had been touched up, but only lightly.  The original "countours" of the ramps were still plainly intact.

However, only today after BRN-180s post did I get around to looking at my recently acquired SOCOM's BE. The barrel is dated 5/19, so it is pretty recent.  Well, it got hit by the "dremel monkeys" alright:

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It is hard to capture just how bad it is on the right hand (as you look into it from the rear of the receiver) side, inner portion because too much light will reflect back and "white out" the picture and not enough makes it hard to see.  I don't really care for cosmetics (there are some nicks on the delta ring where they obviously use some tool to compress it to install the RAS) but when you look at this "polish job" they created waves/ripples in that area altering the original machined-in contour.  I can't see how that can possibly facilitate feeding.  I've seen some ugly ass dremel monkey shit in the review section on the PSA website but c'mon Colt, you're better than this.

What the hell is the purpose of this? I gotta check out my HBPW upper.

It seems that colt barrels bought stripped are not monkeyed up, only assembled uppers. Was doing some cleaning and came across my stash of barrels. 2 14.5’s, and 3 10.3’s and none are touched. Seems to me this is part of the assembly process.

I guess if you want virgin feed ramps then build the upper.