Which White Oak Upper

[UKMan]

Have done my research and it has come down to either:
-20" Varmint upper 1:8 Twist
-20" SPR upper 1:8 Twist

Going with the MLOK handguard and will be threaded but can't decide between the Varmint or the SPR. Will be used as a bench gun from 100-600 yards shooting factory ammo (between 55-77grain to see what it likes) and ARCA mounted on a tripod for coyotes. Thoughts?

 

[riverside jeep]

I just installed the 20" varmint, it's a heavy sucker but it shoots good. Keep in mind it has a .875? gas block so factor that into the handguard choice.

 

[UKMan]

I just installed the 20" varmint, it's a heavy sucker but it shoots good. Keep in mind it has a .875? gas block so factor that into the handguard choice.

Thanks! I was just going to purchase the completed MLOK upper they sell to make it easy.

 

[stanley_white]

I went with the SPR because I was ignorant of the capabilities and limitations of the clamp on gas block that comes with the Varmint and I trusted the research done by the military related to the SPR barrel contour.

-Stan

 

[UKMan]

I went with the SPR because I was ignorant of the capabilities and limitations of the clamp on gas block that comes with the Varmint and I trusted the research done by the military related to the SPR barrel contour.

-Stan

Thanks for the input. If you had to do it again would you still go SPR?

 

[stanley_white]

Thanks for the input. If you had to do it again would you still go SPR?

I would, but let me emphasize that is based on my military background, a PTSD-driven assumption that every firearm I own I need to be able to use to shoot / move / communicate with, and my ignorance of the clamp on gas block design.

If you are on the fence, I would examine the different barrel contours and the different gas block designs in detail prior to purchase, as these are likely the major differences between the two.

Also of note is that White Oak told me when they used to sell lowers, they got them from Aero.

-Stan

 

[UKMan]

I would, but let me emphasize that is based on my military background, a PTSD-driven assumption that every firearm I own I need to be able to use to shoot / move / communicate with, and my ignorance of the clamp on gas block design.

If you are on the fence, I would examine the different barrel contours and the different gas block designs in detail prior to purchase, as these are likely the major differences between the two.

Also of note is that White Oak told me when they used to sell lowers, they got them from Aero.

-Stan

Makes sense, thanks for the information. That’s interesting about the Aero lowers. I have a Colt lower with a larue mbt-2s trigger in it I was going to attach it too but would eventually like to get a dedicated lower for it since this upper is going to be more of a dedicated bench/coyote gun

 

[stanley_white]

Makes sense, thanks for the information. That’s interesting about the Aero lowers. I have a Colt lower with a larue mbt-2s trigger in it I was going to attach it too but would eventually like to get a dedicated lower for it since this upper is going to be more of a dedicated bench/coyote gun

I asked White Oak which receiver they used to use as I mated mine to a BCM and there was more upper to lower receiver play than I would have liked.

I got some JP oversized pins and it tightened everything up.

Had I known this prior, I would have confirmed White Oak’s statement with Aero and then bought an Aero lower assuming slightly better fit between receivers.

-Stan

 

[UKMan]

I asked White Oak which receiver they used to use as I mated mine to a BCM and there was more upper to lower receiver play than I would have liked.

I got some JP oversized pins and it tightened everything up.

Had I known this prior, I would have confirmed White Oak’s statement with Aero and then bought an Aero lower assuming slightly better fit between receivers.

-Stan

I may reach out and ask White Oak about Aero. That sure would be nice since Aero is always running fantastic sales on complete lowers.

 

[riverside jeep]

One can get a low profile regular gas block in that size about anywhere, I was able to use a small dia. handguard on my Varmint profile.

 

[owtlaw]

I have both the SPR and the Varmint. Of the 2 I prefer the SPR as it is a bit more versatile. That said, the varmint can run continuously in hot weather and it doesn't deviate much. Both are incredibly accurate to the point that they shoot better than most bolt actions.

 

[Huskydriver]

Why buy a barrel mounted in a receiver that may or may not have slop in it? F that noise life is too short for sloppy receivers. Adm4 American defense mfg and don't look back

 

[stanley_white]

Why buy a barrel mounted in a receiver that may or may not have slop in it? F that noise life is too short for sloppy receivers. Adm4 American defense mfg and don't look back

Which specific product on ADM’s website are you referring to?

-Stan

 

[Shoreglide]

Pretty sure he’s talking about this-

ADM4 Builder Set

The ADM4 7075-T6 AR-15 Builder Set for lower / upper receivers boasts ambidextrous controls, durable finish, and classic AR15 aesthetics. Order. . .

www.admmfg.com

I have several ADM UIC builds. Really like the ambi lowers, and fit is excellent on all of them.

 

[stanley_white]

Pretty sure he’s talking about this-

ADM4 Builder Set

The ADM4 7075-T6 AR-15 Builder Set for lower / upper receivers boasts ambidextrous controls, durable finish, and classic AR15 aesthetics. Order. . .

www.admmfg.com

I have several ADM UIC builds. Really like the ambi lowers, and fit is excellent on all of them.

Thank you, but what does that do that the White Oak upper doesn’t besides the ambidextrous part?

-Stan

 

[Shoreglide]

Barrel extension to receiver fit tends to be tighter than most with ADM. While they don’t claim thermal fit, all of mine were tight enough that I used my heat gun to make assembly easier.

 

[stanley_white]

Barrel extension to receiver fit tends to be tighter than most with ADM. While they don’t claim thermal fit, all of mine were tight enough that I used my heat gun to make assembly easier.

Thank you!

-Stan

 

[Huskydriver]

Thank you!

-Stan

That and there is 0 wondering if the upper is going to fit tightly with the lower and have slop

 

[stanley_white]

That and there is 0 wondering if the upper is going to fit tightly with the lower and have slop

With an ADM lower or with any lower?

-Stan

 

[Huskydriver]

With an ADM lower or with any lower?

-Stan

If you buy an adm upper and lower matched set they are tight....I only buy matched sets these days lifes to short for crappy fitting ar parts

 

[stanley_white]

If you buy an adm upper and lower matched set they are tight....I only buy matched sets these days lifes to short for crappy fitting ar parts

Understood.

Thank you.

-Stan

 

[TheBigCountry]

Why buy a barrel mounted in a receiver that may or may not have slop in it? F that noise life is too short for sloppy receivers. Adm4 American defense mfg and don't look back

Your Boujie as hell

 

[Trigger Monkey]

Your Boujie as hell

"You're bougie as hell"

For VeerG

 

[Huskydriver]

Your Boujie as hell

Lifes to short man for sloppy ar receivers... And non ambi? How else can I drop the bolt with my pinky out

 

[Kangbeef]

I just installed the 20" varmint, it's a heavy sucker but it shoots good. Keep in mind it has a .875? gas block so factor that into the handguard choice.

I did as well but man so far its performing well still working on what combos it likes best. It is heavy but hope it does well with 60gr v max for yotes.

 

[riverside jeep]

I did as well but man so far its performing well still working on what combos it likes best. It is heavy but hope it does well with 60gr v max for yotes.

I'm having good results with the 77 SMK with both Varget and CFE223 , 50 Barnes Varmint Grenade with Varget, 43 Speer TNT Green and H335. I'm stuck in California so I have to stick with unleaded projectiles for critters. I would bet the 60 Vmax will be great.

 

[Kangbeef]

I'm having good results with the 77 SMK with both Varget and CFE223 , 50 Barnes Varmint Grenade with Varget, 43 Speer TNT Green and H335. I'm stuck in California so I have to stick with unleaded projectiles for critters. I would bet the 60 Vmax will be great.

Man that gives me good insight on light weight bullets. I was worried they wouldnt work well. I have many powders to use CFE233 Tac, varget, 4198, H322, H335,
Blc-2, SW ar plus, staball match. Want to try some VV140/135 and benchmark.

 

[faylix]

I like how my ADM lower has that little pusher that presses against the upper receiver to make an extra tight fit.

I feel like most people don't use them. I guess not all grips have the extra hole to adjust them and doing it without the grip sucks.

At this point I go for every extra bit of love I can get.