Biggy
09-30-14, 00:03
This genuine Rainier Arms Raptor Ambidextrous Charging Handle is new and unused in the bag. It is priced at $75 delivered. Payment would be by a USPS or bank money order. Paypal
would be $78 delivered. No trades are needed at this time. The following link has some more info on the charging handle *** SOLD ***
https://www.rainierarms.com/?page=shop/detail&product_id=3172
https://www.m4carbine.net/itrader.php?u=7422
http://i563.photobucket.com/albums/ss72/Biggy8/Picture277_zps657b4a31.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture277_zps657b4a31.jpg.html)
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Carb and hard 8620 is very good. It's what original M14 recievers were made of. Carb and hard 6150 would be even better but is more expensive and harder on tooling.
4140/4130 are gtg and can be plenty hard and still remain tough.
When talking about case hardening the lugs on an ar15 bolt, you're pretty much through hardening, considering the thickness of the bolt lugs, if you're using any real depth of case. Case hardening can run a wide range of thickness and proceedure. From cyanide (not used much anymore) and a .010 case, to carburize and harden up to .080 thickness. Then you have nitride, carbo nitride, tin, tian, etc etc.
I am not going to comment on the JP or LW bolts specifically but 9310 has a very good tensile and yeild strength. There is nothing wrong with the material. Except for the small bolt face there is nothing wrong with the design of the bolt.
All it takes is one guy BSing with his buddy while he programs or sets the timer on the oven during carburizing, just a little too long or too hot and the material comes out brittle, even with the best design and machining in the world nothing can save the bolt from bad carburizing.
If one broke at the cam pin hole it was more than likely too brittle, a loose fitting cam pin can increase the chance of breakage just like a rifle that is over-gassed or has a pistol gas system even a carbine gas 5.56 can shorten the life of a bolt.
Most commercial AR bolts are made from 8620 just like the carriers, DOD contractors are required to use Carpenter alloy 158 or P6 as it is commonly called, the yeild of P6 is not as high as 9310.
would be $78 delivered. No trades are needed at this time. The following link has some more info on the charging handle *** SOLD ***
https://www.rainierarms.com/?page=shop/detail&product_id=3172
https://www.m4carbine.net/itrader.php?u=7422
http://i563.photobucket.com/albums/ss72/Biggy8/Picture277_zps657b4a31.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture277_zps657b4a31.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture279_zps0854896f.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture279_zps0854896f.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture280_zps7359062a.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture280_zps7359062a.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture281_zps03e13d5d.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture281_zps03e13d5d.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture282_zps5fec887b.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture282_zps5fec887b.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture283_zps5185ed13.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture283_zps5185ed13.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture284_zps65eec78b.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture284_zps65eec78b.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture285_zpse0cb6cc8.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture285_zpse0cb6cc8.jpg.html)
http://i563.photobucket.com/albums/ss72/Biggy8/Picture286_zps8a7d3f09.jpg (http://s563.photobucket.com/user/Biggy8/media/Picture286_zps8a7d3f09.jpg.html)
Carb and hard 8620 is very good. It's what original M14 recievers were made of. Carb and hard 6150 would be even better but is more expensive and harder on tooling.
4140/4130 are gtg and can be plenty hard and still remain tough.
When talking about case hardening the lugs on an ar15 bolt, you're pretty much through hardening, considering the thickness of the bolt lugs, if you're using any real depth of case. Case hardening can run a wide range of thickness and proceedure. From cyanide (not used much anymore) and a .010 case, to carburize and harden up to .080 thickness. Then you have nitride, carbo nitride, tin, tian, etc etc.
I am not going to comment on the JP or LW bolts specifically but 9310 has a very good tensile and yeild strength. There is nothing wrong with the material. Except for the small bolt face there is nothing wrong with the design of the bolt.
All it takes is one guy BSing with his buddy while he programs or sets the timer on the oven during carburizing, just a little too long or too hot and the material comes out brittle, even with the best design and machining in the world nothing can save the bolt from bad carburizing.
If one broke at the cam pin hole it was more than likely too brittle, a loose fitting cam pin can increase the chance of breakage just like a rifle that is over-gassed or has a pistol gas system even a carbine gas 5.56 can shorten the life of a bolt.
Most commercial AR bolts are made from 8620 just like the carriers, DOD contractors are required to use Carpenter alloy 158 or P6 as it is commonly called, the yeild of P6 is not as high as 9310.