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AR 10 lower vs AR multi cal lower

Posted By: Kung Fu Widgeon

AR 10 lower vs AR multi cal lower - 09/03/12 04:54 AM

What is the difference in the two? If the multi cal can function with such a wide range of uppers, why not the 308? Why does the 308 have to be AR 10 lower?
Posted By: KC

Re: AR 10 lower vs AR multi cal lower - 09/03/12 05:36 AM

Magazine well dimension for one.
Posted By: Kung Fu Widgeon

Re: AR 10 lower vs AR multi cal lower - 09/03/12 05:43 AM

I thought a 50 beowolf could fit on a multi cal which would require a larger mag well than a 308, right?
Posted By: Vern1

Re: AR 10 lower vs AR multi cal lower - 09/03/12 06:14 PM

It's the LENGTH of the magazine and the extra distance the AR10 has to cycle the bolt to load longer ammo.

A multi caliber AR15 lower will shoot multiple calibers of bullets but they are limited in length by the magazine.

Put an AR10 receiver and an AR15 receiver side by side and the difference is VERY obvious.
Posted By: kmon11

Re: AR 10 lower vs AR multi cal lower - 09/03/12 07:01 PM

Originally Posted By: ElkSlayer
I thought a 50 beowolf could fit on a multi cal which would require a larger mag well than a 308, right?


Nope the Beowulf fits a standard M4 or AR15 lower. Also I see several posts in this thread refering to Long action. While the AR10 is longer and larger than the AR15 the AR10 is chambered for what are considered short action calibers when talking other gun types ie bolt or lever. The AR10 is designed around the 7.62 Nato (308 Winchester) cartridge and can be found with barrels for some of the other 308 family of cartridges that share the same case but different bullet diameters like 243, 260, 7mm-08, 308 and 338 Federal plus some others of the same overall legnth.

Posted By: Adelbridge

Re: AR 10 lower vs AR multi cal lower - 09/04/12 01:36 AM

The AR-10s are also built to handle significantly higher pressures. AR-10s weigh about 2-3 lbs more on average. My unloaded AR-10 is was advertised at 11 lbs. Add a scope and a full mag and it is suited for bench shooting and blind hunting. When I bought mine I thought I would get a .243 for my kid to hunt with but it is too heavy for her.
Posted By: fonzo

Re: AR 10 lower vs AR multi cal lower - 09/04/12 08:27 PM

just to add on, the beowulf works just fine on the multi-cal lowers, that's what mine is on. standard mags work just fine also. the ammo fits just fine in a magpul or metal magazine also, i tend to use the metal magazines though
Posted By: kmon11

Re: AR 10 lower vs AR multi cal lower - 09/04/12 11:09 PM

Originally Posted By: Adelbridge
The AR-10s are also built to handle significantly higher pressures. AR-10s weigh about 2-3 lbs more on average. My unloaded AR-10 is was advertised at 11 lbs. Add a scope and a full mag and it is suited for bench shooting and blind hunting. When I bought mine I thought I would get a .243 for my kid to hunt with but it is too heavy for her.


556 is loaded to higher PSI than 308 or 243, the larger cartridges do have more square inches though because they are bigger. The AR10 is physically bigger to function with a bigger cartridge, not neceaaarly higher pressure
Posted By: TeeTen

Re: AR 10 lower vs AR multi cal lower - 09/05/12 05:00 PM

Originally Posted By: kmon1

556 is loaded to higher PSI than 308 or 243, the larger cartridges do have more square inches though because they are bigger. The AR10 is physically bigger to function with a bigger cartridge, not neceaaarly higher pressure


There's No Replacement For Displacement

wink
Posted By: kmon11

Re: AR 10 lower vs AR multi cal lower - 09/05/12 07:34 PM

Originally Posted By: TeeTen


There's No Replacement For Displacement

wink



Very true.
Posted By: Chopped54

Re: AR 10 lower vs AR multi cal lower - 09/05/12 10:33 PM

Originally Posted By: TeeTen


There's No Replacement For Displacement

wink



Forced induction!!!
Posted By: B MADIGAN

Re: AR 10 lower vs AR multi cal lower - 09/06/12 03:47 AM

Originally Posted By: Chopped54
Originally Posted By: TeeTen


There's No Replacement For Displacement

wink



Forced induction!!!


+1
Posted By: Adelbridge

Re: AR 10 lower vs AR multi cal lower - 09/06/12 05:45 PM

put a whipple on your flatop
Posted By: Chopped54

Re: AR 10 lower vs AR multi cal lower - 09/06/12 05:50 PM

Originally Posted By: Adelbridge
put a whipple on your flatop


I laughed....
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