AR-15 Uppers

[Tweety Bird]

. . . Don't forget to swap the corresponding bolt with the barrel when/if you change back.

I know you don't know me from Adam, and I did say I'm new to the AR platform. But at the risk of sounding like a smartass (not my intent), I gotta say that's a pretty common-sense thing, in my opinion.

So, no worries. I'm a fairly smart guy and know enough to keep the bolt assembly paired with the barrel extension. In the end, all I did was swap the sheetmetal with the ejection port cover and forward assist (didn't take them off the uppers, for obvious reasons). All the internals remain the same on both guns.

[Great-Kazoo]

if you choose to use a different bolt carrier assy, always check head space. you might be surprised how many different bolt assy's will fit correctly your bbl with good HS. YMMV

[legaleagle]

Jim - I am always surprised at the different bolt nad barel combo. It has worked every time. COnsidering the military measures to field on the HS, it would be difficult to find a bad combo, absent lots of use and wear.

Tweety - glad the wrench worked. Kinda like wrenching on an airplane, just alot cheaper than the annual inspection. THe other good news is you don't have the FAA doing your physical for a firearm. LOL.

[Tweety Bird]

. . .Tweety - glad the wrench worked. Kinda like wrenching on an airplane, just alot cheaper than the annual inspection. THe other good news is you don't have the FAA doing your physical for a firearm. LOL.

Andy, that's true enough, but there seem to be plenty of people warning me about the BCG. I keep trying to calm their concerns, but every time I write a response, I delete it and back out because again, I don't want to sound like a smartass when I write what I'm actually thinking.

BUT CALM DOWN, PEOPLE. I DIDN'T MIX UP THE BOLT CARRIER GROUPS! I am actually smarter than that. Even if it turnes out that it makes no difference, I wouldn't mix them up anyway, in the name of good maintenance practice if nothing else.



Sunday was a day of accomplishments. We got to have breakfast with you and your family; I got the front brakes and a leaky tire fixed on the War Wagon (that blue beater commuter car you saw us in - the one with the RAY WELLS BLOWS sticker in the rear window), and I got this work done on the ARs.

It truly was a simple job, took less than an hour. The hardest part was finding something to use in my vise so I didn't mar the barrels. An old leather glove fit the bill nicely. The gas tubes came out easily, getting the barrel nut tight and lined up for the gas tube was simple, and I didn't even lose those itty-bitty little roll pins from the FSMs!

It was actually much easier than many jobs I've done on airplanes. Replacing the auto speedbrake actuator on a 737 comes immediately to mind. Another would be replacing the keel beam overheat detector element, also on the 737. Or, changing the switch that places the DC-10 pressurization system in the manual mode. I think Douglas dangled that thing on a string and built the rest of the airplane around it. And until just now, I'd forgotten about that clockspring wire on the Convair 340 flaps drive. <UGH>

And now that I'm in the training side of the business, it could be said that ANYTHING is easier than Adult Education!

[espos1111]

I know you don't know me from Adam, and I did say I'm new to the AR platform. But at the risk of sounding like a smartass (not my intent), I gotta say that's a pretty common-sense thing, in my opinion.

So, no worries. I'm a fairly smart guy and know enough to keep the bolt assembly paired with the barrel extension. In the end, all I did was swap the sheetmetal with the ejection port cover and forward assist (didn't take them off the uppers, for obvious reasons). All the internals remain the same on both guns.

A lot of new people look to these threads as a place for help/trouble shooting. That statement was more for them than you.

[Tweety Bird]

A lot of new people look to these threads as a place for help/trouble shooting. That statement was more for them than you.

Well, I suspected that, but wish you'd actually said so, because they didn't read that way. Anyhow, that's the reason I've written, then decided not to post some of the sarcastic replies I've been tempted to put here.

[espos1111]

Well, I suspected that, but wish you'd actually said so, because they didn't read that way. Anyhow, that's the reason I've written, then decided not to post some of the sarcastic replies I've been tempted to put here.

In the first part of the post I said cool and cheers. Why would I then go on to insult you. And like you said I also do not know you from adam so telling us you are an airplane mechanic does not tell me what your knowledge base is. I know doctors that can remove your heart but can't change a car battery. It was just a friendly reminder for some nubees. I'm sure out there somewhere is somebody that didn't know about the bolt/extension mating. It doesn't always cause problems, but I have seen problems after somebody puts in a new bolt. Just to be clear: that statment was not meant for you So no hard feelings here.