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mistuhchia
01-29-2010, 10:25 PM
What exactly is it?

Can i Fire .308 out of it?

huggybear
01-29-2010, 10:26 PM
ive been meaning to ask this question myself. i think it means that it fires 5.56 and 223 but i may be wrong

bambam8d1
01-29-2010, 10:30 PM
lol i may be proving I am a retard and lack of knowledge here.... but isnt a .308 round alot longer than a .223?

mistuhchia
01-29-2010, 10:50 PM
what about shooting 6.5

SixPointEight
01-29-2010, 10:51 PM
lol i may be proving I am a retard and lack of knowledge here.... but isnt a .308 round alot longer than a .223?

Yes, .308s require a much different lower, since they are so much longer

crob
01-29-2010, 10:52 PM
.308 would require a larger receiver. Mu;ti-Cal marking is more of a cosmetic thing really. The upper dictates the round that is used on the AR platform. Some guys just don't want the lower on their 6.8 to say 5.56. Or their 6.5 etc....

mistuhchia
01-29-2010, 10:58 PM
So you could shoot 6.8 or 6.5 out of a multi cal lower

Noah3683
01-29-2010, 11:05 PM
6.5, 6.8, 450 bushmaster, 9mm, 7.62x25, 50 beowulf, 458 socom. 204, 22lr and just about anything else i'm forgetting like 5.7 upper kits will work with the 5.56/multi-cal lower (they are the same thing, just a different stamp) umm anyway just about everything but 308 works

Locknezzie
01-29-2010, 11:09 PM
You should be able to fire quite a few different rounds out of a multi cal lower or any standard mil spec lower. Examples would be .223/5.56, 9mm, 40cal, .458 socom, 6.5 grendel, 6.8spc, 50 beowulf, ect. Lots of calibers to choose from.:)

crob
01-29-2010, 11:09 PM
Yes, you can even shoot them out of lowers marked 5.56. As long as you intend to keep the AR the same functionally, you can pretty much shoot any round that will fit in a mag that will fit in an AR mag well. If it fits and you can afford it, you can shoot. It is perfectly legal to swap different caliber uppers on the same lower.

Cokebottle
01-30-2010, 12:01 AM
Yes, you can even shoot them out of lowers marked 5.56. As long as you intend to keep the AR the same functionally, you can pretty much shoot any round that will fit in a mag that will fit in an AR mag well. If it fits and you can afford it, you can shoot. It is perfectly legal to swap different caliber uppers on the same lower.
Or as mentioned above, such as the .50 Beowulf, you can install a bolt-action upper and fire anything the upper will accept.

But the typical uppers used (RE: In-stock OTC at many shops) that preserve semi-auto operation would be .22lr, 9mm, .223/5.56, 6.5, and 6.8.

Bhobbs
01-30-2010, 12:08 AM
The lower receiver has nothing to do with what caliber the rifle is chambered for other than the length of the round. I think they started putting multi-cal so people would not get confused about which receiver to buy. As long as the cartridge is the same OAL as the 5.56 or .223 it will work in that lower receiver.

Trendkill
01-30-2010, 12:10 AM
You can fire 7.62x39 as well.....its cheap....common...and effective.

VaderSpade
01-30-2010, 8:40 AM
For the DPMS style .308 lower DPMS makes uppers in .243 Win, .260 Rem, .308 Win, & .338 Fed. I sure others are available.

shooterdude
01-30-2010, 8:42 AM
The markings on the lowers mean NOTHING except for the serial number.

slo5oh
01-30-2010, 9:26 PM
2 pages and no one mentioned 5.45x39?

Looks like a fun new way to shoot LOTS for cheap, but ~$800 for the upper makes it hard for me to bite.

Connor P Price
01-31-2010, 9:23 AM
Or as mentioned above, such as the .50 Beowulf, you can install a bolt-action upper and fire anything the upper will accept.

But the typical uppers used (RE: In-stock OTC at many shops) that preserve semi-auto operation would be .22lr, 9mm, .223/5.56, 6.5, and 6.8.

.50 beowulf is designed to be an auto loading cartridge that preserves semi auto operation in the AR platform. The magazines load in a regular AR lower perfectly.

You could use a .50 BMG or .510 DTC bolt action upper like the ones from bohica. Those calibers are definitely to long to fit through a standard AR magwell.