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Posted: 6/28/2015 8:14:50 PM EDT
Calculating the weight of my AR-15. Last part I need is:

Dust cover, rod, spring, C-clip

Does anyone have one they can weight for me?

Thanks!
Link Posted: 6/28/2015 10:26:31 PM EDT
Quoted:
Calculating the weight of my AR-15. Last part I need is:

Dust cover, rod, spring, C-clip

Does anyone have one they can weight for me?

Thanks!
View Quote


20 grams or 0.70 ounces.
Link Posted: 6/28/2015 11:29:24 PM EDT
i saw this post, and i have to ask, why does it matter?
Link Posted: 6/29/2015 4:19:50 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Quoted:


20 grams or 0.70 ounces.
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Calculating the weight of my AR-15. Last part I need is:

Dust cover, rod, spring, C-clip

Does anyone have one they can weight for me?

Thanks!


20 grams or 0.70 ounces.


Thanks man!

Quoted:
i saw this post, and i have to ask, why does it matter?


Adding up the weight of my AR-15. I don't have a scale that goes higher than 2lb to weight it on, so I weighed everything out separately. I searched online for different weights, this was the last thing I needed to add and it was bugging me (didn't want to take my dust cover off)

https://docs.google.com/spreadsheets/d/1ZOQNyqi3hQOK3mNcTxoNFsHY9_42man44XdebTaPQ9Q/pubhtml?gid=0&single=true

I saved 29oz this year.

Main savings:

ACS-L to CTR
Bobro 30mm mount to Aero lightweight 30mm mount
Voodoo 16" fluted barrel to Faxon 14.5
M16 BCG to Voodoo Low mass BCG
ST-T2 to ST-T0 (just took the weights out of the buffer)
Keymod rail to MLOK
Link Posted: 6/29/2015 8:35:40 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Quoted:


Thanks man!



Adding up the weight of my AR-15. I don't have a scale that goes higher than 2lb to weight it on, so I weighed everything out separately. I searched online for different weights, this was the last thing I needed to add and it was bugging me (didn't want to take my dust cover off)

https://docs.google.com/spreadsheets/d/1ZOQNyqi3hQOK3mNcTxoNFsHY9_42man44XdebTaPQ9Q/pubhtml?gid=0&single=true

I saved 29oz this year.

Main savings:

ACS-L to CTR
Bobro 30mm mount to Aero lightweight 30mm mount
Voodoo 16" fluted barrel to Faxon 14.5
M16 BCG to Voodoo Low mass BCG
ST-T2 to ST-T0 (just took the weights out of the buffer)
Keymod rail to MLOK
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Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
Quoted:
Calculating the weight of my AR-15. Last part I need is:

Dust cover, rod, spring, C-clip

Does anyone have one they can weight for me?

Thanks!


20 grams or 0.70 ounces.


Thanks man!

Quoted:
i saw this post, and i have to ask, why does it matter?


Adding up the weight of my AR-15. I don't have a scale that goes higher than 2lb to weight it on, so I weighed everything out separately. I searched online for different weights, this was the last thing I needed to add and it was bugging me (didn't want to take my dust cover off)

https://docs.google.com/spreadsheets/d/1ZOQNyqi3hQOK3mNcTxoNFsHY9_42man44XdebTaPQ9Q/pubhtml?gid=0&single=true

I saved 29oz this year.

Main savings:

ACS-L to CTR
Bobro 30mm mount to Aero lightweight 30mm mount
Voodoo 16" fluted barrel to Faxon 14.5
M16 BCG to Voodoo Low mass BCG
ST-T2 to ST-T0 (just took the weights out of the buffer)
Keymod rail to MLOK


Good to see a 14.5" put to great use!
Link Posted: 6/29/2015 5:14:42 PM EDT
You should find or buy a scale that can weigh the complete rifle.  You will run into tolerance stacking issues by weighing parts separately and adding the measured weights together. Just being off a little bit high or low on the weight of an item, due to inherent variations in the scale accuracy can produce a significant variation when compared to weighing the whole rifle.

I understand what you are doing and why, and weighing each item has clear value, but the total weight savings may be different when the whole rifle is weighed.  I don't think you can say it is 29 ounces unless you weighted the complete rifle before and after.
Link Posted: 6/29/2015 5:19:35 PM EDT
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Quoted:
You should find or buy a scale that can weigh the complete rifle.  You will run into tolerance stacking issues by weighing parts separately and adding the measured weights together. Just being off a little bit high or low on the weight of an item, due to inherent variations in the scale accuracy can produce a significant variation when compared to weighing the whole rifle.

I understand what you are doing and why, and weighing each item has clear value, but the total weight savings may be different when the whole rifle is weighed.  I don't think you can say it is 29 ounces unless you weighted the complete rifle before and after.
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Normally I would tend to agree, but I weigh on a Sartorius Laboratory Balance which is DAMN accurate.
Link Posted: 6/29/2015 8:16:58 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Quoted:
You should find or buy a scale that can weigh the complete rifle.  You will run into tolerance stacking issues by weighing parts separately and adding the measured weights together. Just being off a little bit high or low on the weight of an item, due to inherent variations in the scale accuracy can produce a significant variation when compared to weighing the whole rifle.

I understand what you are doing and why, and weighing each item has clear value, but the total weight savings may be different when the whole rifle is weighed.  I don't think you can say it is 29 ounces unless you weighted the complete rifle before and after.
View Quote


I'll keep that in mind. These were part changes over a long period of time. Documenting each old and new part separately. I'll look into a scale.
Link Posted: 6/29/2015 8:38:10 PM EDT
fair enough, weight isnt an issue for me personally
Link Posted: 6/29/2015 9:55:03 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Quoted:


I'll keep that in mind. These were part changes over a long period of time. Documenting each old and new part separately. I'll look into a scale.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:
You should find or buy a scale that can weigh the complete rifle.  You will run into tolerance stacking issues by weighing parts separately and adding the measured weights together. Just being off a little bit high or low on the weight of an item, due to inherent variations in the scale accuracy can produce a significant variation when compared to weighing the whole rifle.

I understand what you are doing and why, and weighing each item has clear value, but the total weight savings may be different when the whole rifle is weighed.  I don't think you can say it is 29 ounces unless you weighted the complete rifle before and after.


I'll keep that in mind. These were part changes over a long period of time. Documenting each old and new part separately. I'll look into a scale.


The margin of error applies to the measured weight of each old part, too.  That doubles the error if you try to combine the weights.
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