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 ar 15 parts interchanging
#647299
03/24/09 12:22 AM
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Joined: Aug 2008
Posts: 76
greywolf
OP
Outdoorsman
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OP
Outdoorsman
Joined: Aug 2008
Posts: 76 |
do all the parts interchange?my cousin got me a lower
so if i see mr. doe selling stocks,uppers are they the same or is it just RR for RR?i would like to try to buy used for right now maybe someone upgraded,i just dont want to spend 600.00 on an upper if i can get it little cheaper.
thanks for any info
George
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Re: ar 15 parts interchanging
[Re: greywolf]
#647300
03/24/09 12:27 AM
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Joined: Sep 2004
Posts: 4,780
JBCooper
Extreme Tracker
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Extreme Tracker
Joined: Sep 2004
Posts: 4,780 |
most of the AR parts and receivers are modular and will fit...however, I think there are some colt models/parts that won't interchange 
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Re: ar 15 parts interchanging
[Re: greywolf]
#647301
03/24/09 02:45 AM
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Joined: Oct 2006
Posts: 10,309
PrimitiveHunter
THF Celebrity
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THF Celebrity
Joined: Oct 2006
Posts: 10,309 |
I was looking at a .308 upper that specifically said it wouldn't fit a DPMS lower. That's the only time I've seen anything like that.
Practice doesn’t make perfect.
Practice makes permanent.
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Re: ar 15 parts interchanging
[Re: PrimitiveHunter]
#647302
03/24/09 07:15 AM
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Joined: Nov 2005
Posts: 32,602
sig226fan (Rguns.com)
duck & cover
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duck & cover
Joined: Nov 2005
Posts: 32,602 |
There are a lot of parts that do interchange, especially in the same caliber or at least family of calibers. However, there are some folks out there that think they are designed as (Sorry for the wording JB) "modular". While they have some common components, they aren't modular like a Sig P250 or a HK XM-8 or the FN equivalent. There are some issues that you can run into, be careful.
One scary trend I have seen lately is the terminology of "Upper" and Upper Receiver, and Barrel, being used improperly. Changing "complete upper receivers" on compatible guns is usually OK (barring the Colt hole type and sizing issues). Changing barrels on upper receivers is not somehting recommended for the average daily operation or operator...
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Re: ar 15 parts interchanging
[Re: PrimitiveHunter]
#647303
03/24/09 10:05 PM
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Joined: Jul 2007
Posts: 181
Bitmap
Woodsman
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Woodsman
Joined: Jul 2007
Posts: 181 |
Quote:
I was looking at a .308 upper that specifically said it wouldn't fit a DPMS lower. That's the only time I've seen anything like that.
.308 upper assemblies are not for AR-15s. To make it more confusing there are several different .308 formats. Armalite/Noveske is one. DPMS/Fulton Armory is another. RRA/Bushmaster is a third. Knight's is another, but it shares magazines with the DPMS system. There are some smaller manufacturers that make lowers for some of these upper assemblies that use different magazines i.e. a lower that will use Armalite upper assemblies using G3 magazines.
Among AR-15 uppers and lowers they are all compatible except for the Colt's that have the oddball pivot pins. You can get adapters for those, but I don't know how well they work.
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Re: ar 15 parts interchanging
[Re: Bitmap]
#647304
03/24/09 10:46 PM
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Joined: Sep 2006
Posts: 418
DrPerry
Bird Dog
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Bird Dog
Joined: Sep 2006
Posts: 418 |
If you are new to AR's you should really check out
ar15.com
there is a lot of information there about building your own and what is compatible with what
hit the ar15 forum and the build it yourself thread
HTH
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Re: ar 15 parts interchanging
[Re: DrPerry]
#647305
03/25/09 04:07 PM
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Joined: Aug 2008
Posts: 76
greywolf
OP
Outdoorsman
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OP
Outdoorsman
Joined: Aug 2008
Posts: 76 |
headed there now 
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