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View Full Version : Is 20" barrel AR-15 worth it?


jackliu239
10-29-2010, 4:59 PM
I know the original M-16 is 18" But is 20" barrel kinda overkill?

i1800collect
10-29-2010, 5:01 PM
It depends purely on what you intend on using that AR-15 for.

tomd1584
10-29-2010, 5:03 PM
compared to what, a 16"? I like 20" builds personally:


http://img.photobucket.com/albums/v445/bravocompanyusa/BCM%20Complete%20Rifles/IMG_0384001_.jpg

jackliu239
10-29-2010, 5:05 PM
Well I plan to use it for precision shooting. But my understanding is that 5.56 don't need that long of a barrel of stabilize the bullet.

And this caught my eye
http://www.bravocompanyusa.com/BCM-20-Rifle-Upper-Receiver-MI-p/bcm-urg-std%2020%20mi%20ss15.htm

Maltese Falcon
10-29-2010, 5:06 PM
If this is your first AR, I would go with the 16". I like it better as an all around carbine. (I have a 14.5, two 16s and a bi-podded bull 20") .

jackliu239
10-29-2010, 5:10 PM
Oh this will be my 2nd AR. How do you like your bi-pod 20". What you think is the major differences between that and your 16" (beside the weight :D)

Donk310
10-29-2010, 5:10 PM
Is it overkill? Of course not. 24" may be... . Is it worth it? Absolutely

Maltese Falcon
10-29-2010, 5:17 PM
Oh this will be my 2nd AR. How do you like your bi-pod 20". What you think is the major differences between that and your 16" (beside the weight :D)

Well my 16s are meant to be carry firearms, slings and quick optics (Eotech and ACOG). The 20 is a bench or prone precision rifle (PRS stock and 6-20x scope). Really two different activities. .

Dreaded Claymore
10-29-2010, 5:20 PM
I've never understood: What are the things you can do with a carbine-length AR that you can't do with those extra four (or 5.5) inches?

Merc1138
10-29-2010, 5:26 PM
I've never understood: What are the things you can do with a carbine-length AR that you can't do with those extra four (or 5.5) inches?

Walk through doorways and maneuver down hallways easier. It's a maneuverability thing, plus you probably don't need the extra velocity you'd get with the few extra inches of barrel length in those distances.

kendog4570
10-29-2010, 5:28 PM
I know the original M-16 is 18" But is 20" barrel kinda overkill?

???????????

Original barrel length is 20" for the M16-A1 and A2.

jackliu239
10-29-2010, 5:30 PM
Well my 16s are meant to be carry firearms, slings and quick optics (Eotech and ACOG). The 20 is a bench or prone precision rifle (PRS stock and 6-20x scope). Really two different activities. .

And are you completely satisfied with your 20" as precision rifle.

3GunFunShooter
10-29-2010, 5:31 PM
Split the difference and get a 18" with the rife gas system.
That is what I run in 3 gun competition and so do most other shooters. My HD rifle is a 16" but I am not shooting that one out to 350 yds.

Maltese Falcon
10-29-2010, 5:43 PM
And are you completely satisfied with your 20" as precision rifle.

It is fairly new, so I don't have much range time on it, still breaking in the barrel. But after about 70 rounds I am getting 1" center to center 3 shot groups at 100 yds with just normal 62 gr run of the mill ammo. Haven't tried any of the heavier match stuff yet (1:9 twist)...I like it.... .

biker777
10-29-2010, 5:47 PM
compared to what, a 16"? I like 20" builds personally:


http://img.photobucket.com/albums/v445/bravocompanyusa/BCM%20Complete%20Rifles/IMG_0384001_.jpg


^^^^^^^^^

this

WW2Buff
10-29-2010, 5:51 PM
???????????

Original barrel length is 20" for the M16-A1 and A2.

That took much longer than it should have.

ETA: Four inches guys. I can do everything with my A4 clone than can be done with a 16, maybe more. 3GunFunShooter, your 16 should be more than capable out to 350 yards.

Sniper3142
10-29-2010, 5:54 PM
Different tools for different jobs.

I have an AR15 with a 16 inch barrel. I use it for general plinking, CQB type training, and possible HD among other uses.

I have an AR15 with a 20 inch barrel. I use it for varmit shooting, plinking, and general range use.

I have an AR15 with a 24 incg barrel. I use it for varmit shooting, plinking, range use, and medium to long range precision work.

There is no ONE RIGHT barrel length for an AR15 type rifle. It ALL depends on where and how you plan on using it.

r6raff
10-29-2010, 6:28 PM
That took much longer than it should have.


As I was going through the replies i was thinking the same thing...

bjl333
10-29-2010, 7:02 PM
Jack, Do you remember my scope AR? Thats a 18" barrel SPR rifle. Its very similar to the one in my sigline. Or build a 20" Varmint gun, just to have a different flavor.

killshot44
10-29-2010, 8:11 PM
20" should be preferable, unless you have visions of egressing APCs, clearing rooms and CQB....

If it is really precision shooting you want to do, skip BCM and go to White Oak Armament. 20" to 26".

halon101
10-29-2010, 8:24 PM
dont really like my 16, i have a 20" lilja med weight bull barrel. i am 6'3" and the 20 fits me. its not too heavy. and it shoots like a dream.

i have been thinking about building an 18 however.

U5512
10-29-2010, 8:38 PM
Gotta love those 20 inchers.....and the original M16 was and is still 20" (you said 18").

<><><><><><><><><><><><><><><><><><><><><><><><><><><><>
http://i884.photobucket.com/albums/ac47/U5512/AR15/Picture1207.jpg

jackliu239
10-29-2010, 9:01 PM
So I am wondering, can 20" AR good enough for hunting? How close is its accuracy compare to Remington 700 series.

GUNFREAK
10-29-2010, 9:04 PM
Gotta love those 20 inchers.....and the original M16 was and is still 20" (you said 18").

<><><><><><><><><><><><><><><><><><><><><><><><><><><><>
http://i884.photobucket.com/albums/ac47/U5512/AR15/Picture1207.jpg

I got a soft spot for the standard 20" M-16 rifle I carried in the Marine Corps. In my experience I don't think it's overkill. We shot out to 500 yards (iron sites) during our qualifications in the prone slow fire portion. I take comfort in knowing I can engage a target at that distance with a 5.56

I came from the generation just before red dot sights and M-4 carbines. The 20" barrel isn't as compact but its not a trapdoor springfield either.

MrPlink
10-29-2010, 9:11 PM
you can clear rooms with a M16 style...
my best friend had to do it several times in Iraq.
On the other hand, if you ask him he prefers the M4, and since being discharged has built himself a carbine :D

bjl333
10-29-2010, 9:14 PM
So I am wondering, can 20" AR good enough for hunting? How close is its accuracy compare to Remington 700 series.

I think the 700 Varmint might have a slight edge compared to a similarly priced AR. But the AR platform can be made plenty accurate.

jackliu239
10-29-2010, 9:18 PM
Great, thanks for the quick response.

bjl333
10-29-2010, 9:38 PM
I thought you wanted to build an AK ??

jackliu239
10-29-2010, 9:53 PM
Already got the AK a month ago :D

bjl333
10-29-2010, 9:55 PM
Dang you're fast !!! :eek:

Afterburnt
10-29-2010, 10:05 PM
Work up loads if you have the time and the space. But I dont bother with that with an AR platform, I got a Rem 700 for that.

WW2Buff
10-30-2010, 9:01 AM
The 20" barrel isn't as compact but its not a trapdoor springfield either.

That's kind of how I see it.