Best Caliber AR in your opinion is......

[Wingnut]

I'm a HUGE fan of 6.5 Grendel when I'm shooting it. I hate that crap when I have to buy more of it though.

 

[exhumed]

Yeah the .223 is a great platform,I love all my ar's but i do love my ar-10 in 308..It gives me wood...

 

[Onua]

My .223 Ar runs steel cased ammo just fine, really like shooting the 458 Socom but it does get pricey.
Would love to get a 5.7 upper

 

[midcountyg]

Don't put a slide fire on a 9mm AR. You are going to experience out of battery fire. If you are lucky, you will just blow the mag out of the gun and feel stuff bounce off your safety glasses. I have seen this happen twice, and would never attempt it.

 

[FIREHAWK]

Don't put a slide fire on a 9mm AR. You are going to experience out of battery fire. If you are lucky, you will just blow the mag out of the gun and feel stuff bounce off your safety glasses. I have seen this happen twice, and would never attempt it.

i don't think enough people know about this, it may be thread worthy.

 

[DarthZed]

Don't put a slide fire on a 9mm AR. You are going to experience out of battery fire. If you are lucky, you will just blow the mag out of the gun and feel stuff bounce off your safety glasses. I have seen this happen twice, and would never attempt it.

Why does this happen to 9mm ARs? If you don't mind me asking.

 

[sykesville]

There's no 6.8 SPC fans in here yet?

some COOL teeshirts being sold over on 68forums.com, 15 bucks (cause of AR-15?), free shipping. Don't think you have to necessarily be a 6.8mm fan to wear these.

http://68forums.com/forums/showthread.php?26158-T-shirt-Apparel-Design-Poll

ps: just passing on the info, I have no part of it, but I did buy one

 

[midcountyg]

Why does this happen to 9mm ARs? If you don't mind me asking.

The design of the bolt assembly does this. The pistol calibers do not have a rotating bolt and do not have a shrouded firing pin. When the hammer releases out of time on a rifle caliber AR, the firing pin is shrouded preventing a strike to the pin, until the bolt is at least partially engaged in the barrel lugs. The slide fire, or any other means of bump firing, can easily release the hammer before the action is in battery. With a rifle caliber, that will normally just mean a light strike and misfire. With a pistol caliber it fires before the bolt is fully forward. I have since thrown them away, but I had some casings in the shop I saved from a bump firing 9mm AR, and it was scary. I honestly don't like the bump firing idea, as even a 5.56 can fire before fully engaged. It isn't as likely, but could result in damage to the bolt and barrel extension. It could also result in injury.

 

[FIREHAWK]

I honestly don't like the bump firing ideaQUOTE]

i wouldn't either if i were you im saving for a krink

 

[Markp]

The design of the bolt assembly does this. The pistol calibers do not have a rotating bolt and do not have a shrouded firing pin. When the hammer releases out of time on a rifle caliber AR, the firing pin is shrouded preventing a strike to the pin, until the bolt is at least partially engaged in the barrel lugs. The slide fire, or any other means of bump firing, can easily release the hammer before the action is in battery. With a rifle caliber, that will normally just mean a light strike and misfire. With a pistol caliber it fires before the bolt is fully forward. I have since thrown them away, but I had some casings in the shop I saved from a bump firing 9mm AR, and it was scary. I honestly don't like the bump firing idea, as even a 5.56 can fire before fully engaged. It isn't as likely, but could result in damage to the bolt and barrel extension. It could also result in injury.

Precisely why I spent way too much on an autosear.

 

[nyc71]

From what I own chambered in AR:
22lr
9mm
5.45x39
5.56
7.62x39
6.8 spc
7.62 NATO
.458 SOCOM
My pick is 6.8 because it provides a balance between round capacity & stopping power.

 

[smores]

How about 5.56x45mm NATO? I mean that's what it was designed for...

The only other caliber I will own in the AR platform is .300-221/.300 Whisper/.300 AAC Blackout. I have no need for a semi-auto .308 Win and it would be a toss-up between a SCAR and LaRue Tactical OBR if I wanted one.

9mm is probably cool in an AR but I'd rather have an MP5 or clone.

 

[LostSoul]

I didn't even bother reading the thread, but my vote goes to 5.56Nato/.223Rem.

 

[ASM80]

5.56 FTW!

 

[jawn]

How about 5.56x45mm NATO? I mean that's what it was designed for...

The only other caliber I will own in the AR platform is .300-221/.300 Whisper/.300 AAC Blackout. I have no need for a semi-auto .308 Win and it would be a toss-up between a SCAR and LaRue Tactical OBR if I wanted one.

9mm is probably cool in an AR but I'd rather have an MP5 or clone.

.302 Yoda is the new hotness.

 

[browning guy]

Or 6.5 fans.

I think Forrest is a fan of both.

got a ar in .260 rem, Love it! it hits hard, shoots flat and is easy to reload for not over the top crazy like some of the other ar rounds, price wise.

 

[dist1646]

6mm Hagar now that brass is available. Used by Carl Bernosky to win the national championships several times. It is the design of John Harrison who is a Maryland resident. It is flat shooting and has outstanding accuracy and velocity from an AR platform. Is now listed in Creedmoor Sports catalog. Hornady plans to make this a factory round in the not too distant future but for now, it is still handload only.

 

[rml33]

Depends on the purpose. All the rounds have a reason for being around. Cost tends to be the biggest issue why people stick with the5.56 or 5.45. I wouldn't shoot an elk with those though. Kinda liking the rock river that takes 7.62x39 ak mags. Supposedly doesn't have the feeding issues of the normal lowers. I am intersted in that. My favorite barring cost is 6.8.

 

[Kelson1066]

5.56/.223 for day to day operations
.22lr for my small game

I would go 308 but I don't have enough money to afford a 308 upper.

 

[ridethemessiah]

20mm vulcan