AR Sponsor
Posted: 12/6/2012 3:15:31 PM EDT
| what does this mean ? |
|
'High shelf' is a thicker cut in the area of the safety to prevent certain full auto parts or 'custom modifications' from being used in a semi automatic AR-15 receiver. It does not mean anything if you do not plan on committing federal violations with your rifle.
'low' shelf/ 'high' shelf are the same for the average shooter. No other discussion on this will come from me. |
(RDIAS - Registered Drop In Auto Sear) In case you don't know what it is.
With the Slide-fires or Bump-a-Rooski's  or whatever those un(small g)godly priced things are called, I say a big PTTBH to the "full auto mystique". That's movie stuff and for screwing around on a outdoor range with lots of bowling pins, 2 liter sodas, etc. Full auto wastes a buttload of ammunition and puts wear on your gun. I have a Marine friend - he did six months of combat in Iraq from Day One. He said that he only used burst (3 round) fire a few times as he didn't want to waste his rounds. He spoke alot about the enemy doing their AK mag-dumps but hitting very little. Then, the returning - disciplined - marksmanship settled the issue.
 : TAKATAKATAKATAKA!!
 : Fweeeeeeeeeee- SMAK!! ... thud.
|
|
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. |
|
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. Is that on all low shelf lowers or just some (Colt)? |
|
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. Is that on all low shelf lowers or just some (Colt)? All Semi-auto lowers have the thickened side walls. 
|
|
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. Is that on all low shelf lowers or just some (Colt)? All Semi-auto lowers have the thickened side walls. http://i22.photobucket.com/albums/b328/jcrowl/Miscellaneous/nfa-ar-m16-01.jpg I did not know that. learn something new today. |
|
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. nothing a dremel cant fix 
Also take a look at the interior dimensions of a plum crazy lower |
|
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. nothing a dremel cant fix
Also take a look at the interior dimensions of a plum crazy lower BATF might frown on that! 
|
|
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. nothing a dremel cant fix
Also take a look at the interior dimensions of a plum crazy lower BATF might frown on that! ya I think they would...also on the plum crazy lower, I dont think that turd could even hold up under full auto, but I think it does have the correct dimensions, or at least close |
|
The "high shelf" is to prevent ready use with a DIAS.
All AR15 lowers need maching to accept an actual factory auto-sear. Frankly IMHO - if you've got the cash to drop on an RDIAS - you've got the $100-$150 to get a lower machined. Whining and crying about high and low shelf lowers is like complaining that you don't like the color of the blinds in your new mansion. ~Augee |
|
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. Is that on all low shelf lowers or just some (Colt)? All Semi-auto lowers have the thickened side walls. http://i22.photobucket.com/albums/b328/jcrowl/Miscellaneous/nfa-ar-m16-01.jpg I did not know that. learn something new today. Not entirely true, as others have pointed out: 
|
|
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. Is that on all low shelf lowers or just some (Colt)? All Semi-auto lowers have the thickened side walls. http://i22.photobucket.com/albums/b328/jcrowl/Miscellaneous/nfa-ar-m16-01.jpg I did not know that. learn something new today. Not entirely true, as others have pointed out: http://picturearchive.gunauction.com/9055075648/9742969/acf65f8.jpg So, what brand of lower is that? |
|
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. nothing a dremel cant fix
Also take a look at the interior dimensions of a plum crazy lower BATF might frown on that! ya I think they would...also on the plum crazy lower, I dont think that turd could even hold up under full auto, but I think it does have the correct dimensions, or at least close I can speak to the fact that it cannot and did not hold up to full auto fire. The FFL that I use has his (SOT) or what ever it is called, to create full auto. He did so with a Plum Crazy and it cracked near the buffer tube. |
|
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. Is that on all low shelf lowers or just some (Colt)? All Semi-auto lowers have the thickened side walls. http://i22.photobucket.com/albums/b328/jcrowl/Miscellaneous/nfa-ar-m16-01.jpg I did not know that. learn something new today. Not entirely true, as others have pointed out: http://picturearchive.gunauction.com/9055075648/9742969/acf65f8.jpg So, what brand of lower is that? looks like plum crazy/new frontier one of the plastic ones |
|
Quoted:
Quoted:
Quoted:
Quoted:
The inside of the lower is machined out sufficiently to install a DIAS. Essentially it has the military dimensions. High shelf lowers are an attempt to prevent converting to full auto by simply drilling the sear pin hole and installing the auto parts. Actually, the low shelf lower doesn't have the military dimensions either. The walls on the sides of the receiver are thicker than than the M-16 receiver so that even if you drilled the sear pin hole, the milspec auto sear still won't fit. nothing a dremel cant fix
Also take a look at the interior dimensions of a plum crazy lower BATF might frown on that! I was just looking at a thread where a guy was showing off his full auto AR it had the thick walls and the RDIAS fits with no machining? Looks like there is a difference between a M16. And full auto AR |
|
Quoted:
With the Slide-fires or Bump-a-Rooski's or whatever those un(small g)godly priced things are called, I say a big PTTBH to the "full auto mystique". That's movie stuff and for screwing around on a outdoor range with lots of bowling pins, 2 liter sodas, etc. Full auto wastes a buttload of ammunition and puts wear on your gun. I have a Marine friend - he did six months of combat in Iraq from Day One. He said that he only used burst (3 round) fire a few times as he didn't want to waste his rounds. He spoke alot about the enemy doing their AK mag-dumps but hitting very little. Then, the returning - disciplined - marksmanship settled the issue.
: TAKATAKATAKATAKA!!
: Fweeeeeeeeeee- SMAK!! ... thud.Great sound effects! I could almost hear the rounds whiz by my head! He he he he.... 
|
AR Sponsor