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Posted: 10/13/2011 10:27:39 PM EDT
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Barrel Lenght got it, Overall, not so much... How the heck do you know what to put on it for Overall length??? EX, 12" Larue Stealth Upper (Battle Comp 2.0 or Surefire 556) Mega Billet Lower with Pistol Buffer Tube I plan buying a Magpul stock once I get the Stamp/approval, but if I were too order it now, put the stock on, then the upper on the lower to measure it, I'd be in violation possible trouble with the ATF and for sure get 200 posts telling me such... |
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Quoted: Also is it stock extended or retracted length? I meant to ask that too... I would think re-tracted a that would be the shortest possible length... I'm not really sure why length even matters though really... Under 16 is SBR, be it 15.9 or 2".... Whats the difference.. You need a stamp either way... |
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First, under federal law, it is measured with the stock fully extended.
That's because by federal definition, a rifle is a shoulder-fired firearm, so it must be measured in the configuration in which it is fired. Some guns can be fired when folded/collapsed; others cannot. For consistency's sake, federal regs make all measurements when fully extended. Second, this isn't rocket science, and no one is going to examine your SBR with a micrometer and throw you in jail if your measurement is off by a fraction of an inch. The only time precise measurement counts is when a Title 1 firearm gets close to the minimum lengths that cross into NFA territory, and thus create an unregistered SBR. So you don't need to worry about fractional differences in stocks, etc. If you have an assembled AR15 rifle, just measure it and subtract the difference between the lengths with the present barrel, and your intended build barrel length. Or just use this, and adjust accordingly: A new factory Colt 6933 with an 11.5" barrel is 30.5" overall. So if you intend to build an SBR with a 12" barrel, the overall length will be 31" (30.5" plus the half-inch-longer barrel dimension). HTH. |
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Quoted: First, under federal law, it is measured with the stock fully extended. That's because by federal definition, a rifle is a shoulder-fired firearm, so it must be measured in the configuration in which it is fired. Some guns can be fired when folded/collapsed; others cannot. For consistency's sake, federal regs make all measurements when fully extended. Second, this isn't rocket science, and no one is going to examine your SBR with a micrometer and throw you in jail if your measurement is off by a fraction of an inch. The only time precise measurement counts is when a Title 1 firearm gets close to the minimum lengths that cross into NFA territory, and thus create an unregistered SBR. So you don't need to worry about fractional differences in stocks, etc. If you have an assembled AR15 rifle, just measure it and subtract the difference between the lengths with the present barrel, and your intended build barrel length. Or just use this, and adjust accordingly: A new factory Colt 6933 with an 11.5" barrel is 30.5" overall. So if you intend to build an SBR with a 12" barrel, the overall length will be 31" (30.5" plus the half-inch-longer barrel dimension). HTH. Yes, thank you much!!!! 
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