Stripped uppers?

[Ncvarmint]

I am building a new 14.5” upper with P/W muzzle devise, i have went with a Ballistic advantage barrel. Going to pick up my Aero M4E1 lower today. My question is i can get a Aero upper with dust cover and forward already installed or a Blemished BCM upper with dust cover and forward assist included. Is the bcm worth the $8 higher price tag than the aero? I was thinking of going with the aero to keep the lower and upper from the same company. But if the BCM is better I’ll go that route. I know most are made from a handful of forging companies.
Thanks

 

[Jerzsubbie]

I’d say it’s purely preference. I have both but tend to keep Aero M4E1 builds all Aero.

 

[Squanchy]

BCM has a thermal fit barrel extension. Some aeros are tight but I don't think it's a design feature. Thermal fit is supposed to be more accurate, no idea if that's true.

Aero/aero will ensure the tightest fit between upper and lower.

Edit: if you don't own a torch or a heat gun don't buy the BCM. I run SOLGW uppers because I'm based AF. I took a propane torch to get the barrel in on my upper. It's TIGHT.

 

[1075tech]

I'm cheap so I'd probably go the AP with the FA and DC already installed if those were my two choices.

I square the face of uppers and bed the barrel extension regardless of brand.

 

[papa_smurf]

I'd keep it aero.

I have the M4E1 lower and M4E1 enhanced upper. The fit between the two is perfect.

 

[Ncvarmint]

Thanks
I just figured since this isn’t a precision rifle I don’t need to worry too much about how tight the barrel fits in the upper.

 

[1075tech]

Thanks
I just figured since this isn’t a precision rifle I don’t need to worry too much about how tight the barrel fits in the upper.

Even if you're not building it for "precision", it only takes a few seconds to square the receiver face. I usually use a little blue loc-tite for bedding the barrel.

Even my blaster builds are pretty accurate

 

[Ncvarmint]

Don’t you have to have a tool to square the receiver face?
Any good links to a video on how to do it

 

[Cape Fear]

Don’t you have to have a tool to square the receiver face?
Any good links to a video on how to do it

Sub'd for the answer to this. @1075tech

 

[Leadchunker]

Sub'd for the answer to this. @1075tech

Yea, what he said.

 

[Squanchy]

You'd need a drill, lapping compound ,and an upper receiver lapping tool.

 

[Squanchy]

@1075tech please make an instructional video with crocs on

 

[1075tech]

@1075tech please make an instructional video with crocs on

I've never had Crocs but seeing as they're all the rage here with the cool people, I might have to get some.

You know, for pictures and stuff

 

[Lucky63]

Be careful with a drill. I use vise grips on the extension that would go in the drill. Slower but better IMO.

 

[1075tech]

Don’t you have to have a tool to square the receiver face?
Any good links to a video on how to do it

This is what I've used
Amazon product ASIN B00AUEHRBQ

 

[Ncvarmint]

I watch the video and it looks fairly simple so I may do that to all mine. Brownells has a tool for $20 and I have lapping compound from my wheelers scope mounting kit

 

[Lucky63]

Be careful with a drill. I use vise grips on the extension that would go in the drill. Slower but better IMO.

Aero Precision


Stop and check your progress. Just remove a little at a time.

 

[Lucky63]

Obviously be sure to clean the threads on the receiver when you’re done. Don’t want that barrel nut to turn into a lapping tool 😉