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Posted: 10/18/2009 9:51:13 AM EDT
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They ask for your length of your SBR on the form 1 but without having all your parts your just approximate right.I guess ya just put what is your best guess on it?
If i measure my 16 inch RRA from end od extended buttstock to about where i think the end of the threaded part of a 10.5 barrel would be i come up with 28 3/4 inches.Should i put 28 3/4 inch or what? 
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OK my upper the end of the barrel extension is slightly aft of pin hole so i measured from that point on the lower to extended buttsock and come up with 29 1/4 inch adding 10 1/2 for barrel.
So I quess and exact measurement is not what they are looking for on from 1....? I will put 29.25 
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| I would think that's fine, I don't think they are to picky +/- a little bit....to measure a barrel, is from the closed bolt face to the muzzle, not including any muzzle device and the bolt does lock inside the barrel extension there for you can measure to the takedown pin and add the barrel length |
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Quoted:
I would think that's fine, I don't think they are to picky +/- a little bit....to measure a barrel, is from the closed bolt face to the muzzle, not including any muzzle device and the bolt does lock inside the barrel extension there for you can measure to the takedown pin and add the barrel length OK i did not know it starts at closed bolt face i thought was end of extension.....so mine is 29.50 from front of take down pin to end of extended buttstock. So front of pin is correct....
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Quoted:
Quoted:
I would think that's fine, I don't think they are to picky +/- a little bit....to measure a barrel, is from the closed bolt face to the muzzle, not including any muzzle device and the bolt does lock inside the barrel extension there for you can measure to the takedown pin and add the barrel length OK i did not know it starts at closed bolt face i thought was end of extension.....so mine is 29.50 from front of take down pin to end of extended buttstock. So front of pin is correct.... correct.... the barrel extension is just an extension not part of the barrel, I know it's a little confusing, I was the same way with my first 
you must have a very long buttstock 
ETA: once you get your stamp and assemble your SBR and measure your exact length and your off a bit you can always write BATFE and amend your form but it is not necessary, besides you'll most likely get other uppers in various length for it anyway and change the configuration which is acceptable also |
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Quoted:
Quoted:
Quoted:
I would think that's fine, I don't think they are to picky +/- a little bit....to measure a barrel, is from the closed bolt face to the muzzle, not including any muzzle device and the bolt does lock inside the barrel extension there for you can measure to the takedown pin and add the barrel length OK i did not know it starts at closed bolt face i thought was end of extension.....so mine is 29.50 from front of take down pin to end of extended buttstock. So front of pin is correct.... correct.... the barrel extension is just an extension not part of the barrel, I know it's a little confusing, I was the same way with my first
you must have a very long buttstock
ETA: once you get your stamp and assemble your SBR and measure your exact length and your off a bit you can always write BATFE and amend your form but it is not necessary, besides you'll most likely get other uppers in various length for it anyway and change the configuration which is acceptable also Its an RRA adjustable butt stock 6 postion and it really extends for sure.I am not into those fancy stocks.It took me a long time to get my first quad rail...ha! |
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