Best 3 or 4 AR15 Upper Receiver Types?

[ebb]

Looking to build 2 uppers for accuracy and i have heard that some are thicker than others and more rigid for a precision upper. Is a forward assist a waste of time and money? I don't like the side pull uppers as they need an Allen wrench to disassemble to clean. Any suggestions would be appreciated. Thanks Mark

 

[rkb21]

If you can find a Defiance Machine upper and lower you will have one of the best in my opinion they only made them for a short time.

 

[Rocketvapor]

I know you said that you didn't like the side pull uppers because of the Allen wrench required for cleaning but I think it is very strong and stable (7075 Billet).
The extra thickness of the upper (not just the threaded nose)should hold a heavy barrel better than a thinner/lighter one.

For F-Class matches I keep an Allen in the ammo box, just in case.
For cleaning at home it's a few seconds to remove.
I use several BCA side charge uppers. The Gen 2 has a new handle.
The handle can also be used as a forward assist if you wanted.
Right now the cost is low for an upper and BCG combo. Bolt is MPI marked 9310 (lot tested I'm sure).

BC-15 | .223/5.56 NATO/300 Blackout/350 Legend Right Side Charging Gen 2 Upper Receiver/BCG Combo

Drop this Bear Creek Arsenal Gen-2 AR-15 side charging upper receiver combo in your next build for superior performance and ergonomics!

www.bearcreekarsenal.com

Fit and finish of the last 3 have been great.

 

[SG4247]

LAR, MEGA, and Lantec

The first two are prolly not aval now, but Lantec should be.

I have several of each. Also have a BCA, and do not recommend it.

Lantec has the best machine work period.

 

[whatsupdoc]

IRMT-3 Upper

<p><strong>iRMT-3 Upper</strong></p> <p>Designed for extreme accuracy and durability under real-world stress, the iRMT-3 upper receiver allows your barrel to be a true free float system. With the handguard attaching directly

seekinsprecision.com

 

[Dusty Stevens]

I used to use and love mega but now i use wilde arms exclusively, but its a set upper and lower. Wilson combat makes a nice one if you dont want to get too custom

 

[Gargoyle]

I build sub MOA Aero Precision rigs. M4E1 Cerakoted uppers. Don't need bedded with the extra thickness of the Cerakote in the extension area. Aero Precision also makes a beefed up "Enhanced uppers". Have not needed to go that route though.

 

[CJ6]

Les Baer. I have a couple of his.

 

[SG4247]

One left, takes std charge handle too if you want.

Before we continue

Lantec roller burnishes the bore on these, they are smooth as glass and perfect size.

 

[WildBill3/75]

Aero.

Mega monolithic used to be amazing... To bad they sold out to Zev and now suck.

 

[SG4247]

Picked up this last year and it is fantastic.

 

[Hino895]

Mega arms HD the absolute best but no longer made (I have one Left)
DPMS Sportical slick side was and is a excellent upper receiver.

 

[65swede]

I'm very happy with the two Nordic Components Extruded Uppers I have.

 

[Ray123]

I've built quite a few Areo Precision Enhance upper recievers with good experience, ...along with a premium barrel.

 

[wbm]

I use several BCA side charge uppers. The Gen 2 has a new handle.
The handle can also be used as a forward assist if you wanted.

Got my BCA 20" Wylde, stainless, fluted heavy barrel, side charge, three weeks ago. Most accurate out of the box AR I have ever shot. Fit and finish are excellent. Range report? After setting the rifle up and firing some cheap ammunition I fired some 55gr Sierra Blitzkings that I had loaded for my other AR....10 rounds in 1"....and yes I have pics. Rifle functioned perfectly.

 

[Sandstorm]

I have used Vltor for several of mine...they are well made, and thicker.

 

[Fuj]

I use the Rock River EOP uppers for my 1" bull AR's. I use low
profile Burris extreme rings

 

[No.343]

Is a forward assist a waste of time and money?

I think so, specially with a lightened bolt carrier. I put a plug in my lowers with a lightened BCG.

 

[Rocketvapor]

I probably shouldn't have posted about BCA side charge uppers in a thread asking about the BEST.
Obviously NOT the best. They do seem to have improved lately, and the Gen 2 upper receivers are a really good fit with the X-Caliber barrel I have. Fit doesn't matter much to me as I use a true thermal fit with a spray on shim. Won't go together without heat and cold.
Not for a light weight build as the stripped receiver is 10.25 oz.
I lapped one of my new ones for a new 5.3 pound bull barrel. Will be putting it together in a few days.

Best? Nope. But still a bargain @ $100 with a BCG.

 

[karrarararararar]

The BCM blem upper is about the best deal out there. They're built slightly undersized for a tight fit on the barrel extension.

BCM® Upper Receiver - M4 Flat Top (M4 Feedramps) Complete (Unassembled) - DEMO/Scratched

Fully Assembled, with round forward assist and ejection port cover, and T-Markings laser etched into receiver. This receiver has the M4 feedramps machined in.

bravocompanyusa.com