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Posted: 6/16/2009 12:31:46 PM EDT
[#1]
a simple way of looking at it, high shelf receivers have the area behind the selector switch built up to prevent the use of a RDIAS.
low shelf lowers are not made this way, and a RDIAS can be used with minimal difficulty. RDIAS = registered drop in auto sear. |
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Posted: 6/16/2009 12:36:17 PM EDT
[#2]
High Shelf
 Low Shelf  pics coutesy of Gloftoe |
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Posted: 6/16/2009 12:37:47 PM EDT
[#3]
I see, what is the best way to yell if your lower is a high shelf or a low shelf?
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Posted: 6/16/2009 12:40:05 PM EDT
[#4]
I guess I am to slow and thanks for the pictures
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Posted: 6/16/2009 12:53:11 PM EDT
[#5]
See:
http://www.ar15.com/forums/topic.html?b=3&f=118&t=436317 also http://www.ar15.com/forums/topic.html?b=3&f=12&t=318113&page=6 Quoted:
High or Low Shelf AR Receivers. Who Makes What? This is a list of companies showing who makes high shelf and who makes low shelf AR-15 lower receivers. This is in reference to RDIAS compatibility. RDIAS is Registered Drop In Auto Sear. A RDIAS, which can be found for much less than an registered M-16 or other AR-15 compatible registered select fire lower receiver. Here is a link that goes in to depth on the RDIAS- www.quarterbore.com/nfa/dias.html Low shelf is in green and high shelf in red. Green = DIAS compatible Red = Not DIAS compatible Aero Precision - high shelf Ameetec - low shelf Anvil Arms - low shelf Armalite - high shelf Bushmaster - low shelf CMMG - low shelf CMT - high shelf Colt - high shelf Double Star - low shelf DPMS - low shelf DTI (Del-Ton) - low shelf Essential Arms - high shelf Fulton Armory - low shelf LAR - low shelf LMT - high shelf Mega - low shelf Olympic Arms - high shelf ? Rock River Arms - high shelf Spike's Tactical - Bullet Selector Markings = high shelf / Fire/Safe Selector Markings = low shelf Stag - high shelf Sun Devil - low shelf Superior Arms - high shelf This is the information I have so far. Please feel free to voice any corrections and continue to add to this list (please use the email function as I have no way of knowing if you posted or PM'd me since the board seems to have no notification.) Maybe this should have it's own tack? |
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Posted: 6/16/2009 1:17:09 PM EDT
[#6]
WOW my Essential Arms I believe has a low shelf. Anyway it looks like my LAR. Maybe my LAR is a high shelf?
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Posted: 6/16/2009 1:20:54 PM EDT
[#7]
In addition, I believe that Tactical Innovations receivers, both forged and billet, are low shelf.
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Posted: 6/16/2009 1:43:01 PM EDT
[#8]
Aero Precision has recently switched to making LOW shelf receivers. A great decision from a great manufacturer.
Essential Arms makes their receivers high shelf as standard. They will make low shelf receivers if you request it, but they charge extra. I used to have a low shelf from them, but when I ordered a few more just before the election, I received high shelf. I talked to "Mr. Essential Arms" about it and suggested he make them all low shelf. I suprised him when I told him the number of "tier one" manufacturers that make them low shelf. We'll see if he switches to low shelf as a standard. Not likely is my guess. That is a shame because the lowers I received were well made and went together with no issues. I choose to buy low shelf, but I'll buy them from someone who makes them standard. I'm not paying extra. |
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Posted: 6/16/2009 2:29:21 PM EDT
[#9]
Quoted:
Aero Precision has recently switched to making LOW shelf receivers. A great decision from a great manufacturer. Essential Arms makes their receivers high shelf as standard. They will make low shelf receivers if you request it, but they charge extra. I used to have a low shelf from them, but when I ordered a few more just before the election, I received high shelf. I talked to "Mr. Essential Arms" about it and suggested he make them all low shelf. I suprised him when I told him the number of "tier one" manufacturers that make them low shelf. We'll see if he switches to low shelf as a standard. Not likely is my guess. That is a shame because the lowers I received were well made and went together with no issues. I choose to buy low shelf, but I'll buy them from someone who makes them standard. I'm not paying extra. I bought the Essential Arms lowers some time ago. I didn't pay any extra for the low shelf and if I remember right I paid like $72.00 ea. They where the cheapest I could find at the time. I feel special now 
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Posted: 9/27/2009 7:48:23 PM EDT
[#10]
My new Spike's lower has a low shelf and bullet markings
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Posted: 9/27/2009 8:07:35 PM EDT
[#11]
why do some of the low shelf lower have the thickness on the right wall???
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Posted: 9/27/2009 8:24:44 PM EDT
[#12]
Prevent easier autosear installation.
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Posted: 9/27/2009 8:33:45 PM EDT
[#13]
Hughes Precision HR-15 is also a low shelf.
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Posted: 9/27/2009 9:46:09 PM EDT
[#14]
My S&W M&P-15 is high shelf.
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Posted: 9/28/2009 2:40:57 AM EDT
[#15]
All the new spikes are low shelf
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Posted: 9/28/2009 3:35:16 AM EDT
[#16]
Quoted:
WOW my Essential Arms I believe has a low shelf. Anyway it looks like my LAR. Maybe my LAR is a high shelf? EA makes both high and low and was an option to pick when I bought the five I have. |
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