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Old 01-18-2013, 07:34 PM   #500
Jeffy's Avatar
Joined: Feb 2006
Location: SF - East Bay
Oddometer: 5,419
Originally Posted by KeithinSC View Post
I'd like to build my first AR someday, yeah my timing sucks. Just starting to start researching. It's been something on the list for 10 years.
I'd like a .308, can I use the same lower for that and get a .223 upper later on?
Or are the mags that different?
It depends on the lower but generally no, you can't use a .308 in a .223 lower. (some lowers do allow it though.) The magazines aren't not interchangeable. It's basically like comparing a long-action to a short-action.
"I'm going to shift gears now.... This will involve man touching." - Jeremy Clarkson
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