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Compare Daniel Defense DD4 RIII Upper Receiver Group vs. Rock River Arms AR-15 Varmint A4 Upper

Compare gun price, size, weight, capacity and other specifications.

	Image
Daniel Defense	Brand	Rock River Arms
Daniel Defense DD4 RIII Upper Receiver Group	Model	Rock River Arms AR-15 Varmint A4 Upper
Firearm	Category	Firearm
223/5.56	Caliber	223/5.56
12.5" RIS III Handguard, M-LOK Attachment, M16 BCG, Mid-length Gas System, Government Profile CMV Barrel, M4 Feed Ramps	Features	-
AR-15 Upper Receiver Group	Type	Upper
Semi-Automatic	Action	-
Black/ FDE	Finish	-
None, Optic-Ready	Sight	-
16"	Barrel Length	16 - 24"
Daniel Defense DD4 RIII Upper Receiver Group Eurooptic $1,259.99 Buy Daniel Defense DD4 RIII Upper Receiver Group BattleHawk Armory $1,287.99 Buy Daniel Defense DD4 RIII Upper Receiver Group Eurooptic $1,339.99 Buy Daniel Defense DD4 RIII Upper Receiver Group Eurooptic $1,339.99 Buy Daniel Defense DD4 RIII Upper Receiver Group The Modern Sportsman $1,379.00 Buy Show all	Lowest Prices Online	Rock River Arms AR-15 Varmint A4 Upper Receiver Optics Planet $609.99 Buy Rock River Arms AR-15 Varmint A4 Upper Receiver KyGunCo $612.99 Buy Rock River Arms AR-15 Varmint A4 Upper Receiver Assembly MidwayUSA $655.99 Buy Show all

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Daniel Defense DD4 RIII Upper Receiver Group

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Recent comments

Burris Co FastFire E Green-Dot Reflex Sight 1x 3.5 MOA - $169.99 + Free Shipping

How big is this chunky boy in comparison to a Holosun 407? It looks like a proper mailbox

11 min 20 sec ago Byzyang
50% off CVLIFE Soft Rifle Case Double Long Gun Bag,with Lockable Zipper and Backpack Strap,Rifle Backpack Rifle Bag Gun Case for Outdoor Hunting Shooting Range w/code FTWQOHKM - $33

Does not work fir any size or color

12 min 26 sec ago Bybello1077
50% off CVLIFE Soft Rifle Case Double Long Gun Bag,with Lockable Zipper and Backpack Strap,Rifle Backpack Rifle Bag Gun Case for Outdoor Hunting Shooting Range w/code FTWQOHKM - $33

Works for the 36" FDE and 42" FDE, but not the 46" in any color.

19 min 28 sec ago Bysjlplat
Remington 23728 UMC Full Metal Jacket FMJ 115 Grain 9mm Luger/Parabellum - 1000 Rd - $199.99

Sorry. My error. In my senility I overlooked your "lightweight" spring use. Those springs would certainly throw some codes and cause all sorts of experimentation. I'm still curious why the 124 Rem fails when the factory specs list identical velocities. Maybe the test barrel was longer. I'll have to chrono some. I have probably 15-20 9mm's on the rack, mostly alloy Sig and Beretta, some CZ and HK, Glock, S&W, FNH, etc., in hammer, striker and external extractor 1911 designs, use only duty weight springs, no subs or suppressors, no steel case, and don't shoot them as much anymore. They tend to be boringly reliable with major brands and reloads, with accuracy as the only variable. The Blazer was the only brand causing problems, and that out of a stiff M17. Oh, and a S&W SD9 which was such a POS that it became a test dummy.

1 hour 5 min ago Bynotsecretservice
Federal Champion BYOB Rimfire Ammunition 22 LR 36 gr. CPHP 1260 fps 1375/ct - $85.49 after code: DG5

Shipping is too high

2 hours 36 min ago ByJoshwilk18
34% off 1600 Lumens Rifle Light Laser IR 3-in-1 Combo, Ar Light Laser Combo Magnetic Rechargeable with Remote Switch, Aluminum Flashlight for Rifle Compatible with Picatinny and M-Rail w/code VS2PZ2KD

Code does not give 34 percent off

3 hours 36 min ago ByDonavonK
ZEROHAWK EM1 Enclosed Red Dot Sight with MOS/RMR to RMSc Adapter Plate, 2 & 32 MOA Multi Reticle System Micro Reflex Sight for Pistol, RMSc/K Footprint Compatible, Parallax-Free Sight (Black) - $149.99

Knock off osight? Idk why someone would buy this when those exist and Olight has the best warranty in the business.

5 hours 20 min ago Bybaseballplerrr
Federal Champion BYOB Rimfire Ammunition 22 LR 36 gr. CPHP 1260 fps 1375/ct - $85.49 after code: DG5

Not a good deals. Free shipping over 99$ and it doesn’t even work. Plus there is tax. Came out to 215$ lol. What a joke

5 hours 36 min ago ByThegooseman
Remington 23728 UMC Full Metal Jacket FMJ 115 Grain 9mm Luger/Parabellum - 1000 Rd - $199.99

I can get it to run in a cz. Not in any striker fired pistol with their more radical cam. As you go to lower spring weight in striker fired other problems are introduced. I've tried. I've got 5 k of it.

With the 19 with factory spring it has failures to feed. Slide does not go fully to rear. With a 16 lb spring failures to go into battery. Say every fifth round.

If you go lighter in recoil springs with a Glock you have to lighten firing pin spring...not really wanting to go further down rabbit hole. I just wanted some range ammo not to respring my guns.

PSA micro is more or less same. Bought lighter springs for it too trying to get it to run.

Same guns run like sewing machines with Speer lawman or S&B.
Here is one discussion about UMC low power factor.
I was surprised used many UMC components over the years and they were fine. Still use many rem components.
I haven't chronoed it don't really care. Does not run in my primarie

Gonna take it gun show and dump it.

Care to share the firearms it runs in for you?

https://www.glock.pro/threads/remington-umc-9mm-luger-mega-pack-good-or-bad.1425/...

5 hours 32 min ago ByUndivided
50% off CVLIFE Soft Rifle Case Double Long Gun Bag,with Lockable Zipper and Backpack Strap,Rifle Backpack Rifle Bag Gun Case for Outdoor Hunting Shooting Range w/code FTWQOHKM - $33

Code doesn't work

6 hours 52 sec ago Bydxdevoe