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Posted: 4/26/2015 7:13:15 AM EDT
[#1]
Probablly easier to say multi cal than 5.56/223/300aa/22
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Posted: 4/26/2015 9:01:35 AM EDT
[#2]
Simple marketing. Multi means it can be built into anything. There are plenty of builders that don't want there non 5.56 build to have a 5.56 marked lower. I know I didnt. :)
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Posted: 4/26/2015 10:04:50 AM EDT
[#3]
I built a 300 black out and had the upper engraved with " 300 AAC BLACKOUT ". Went to put the upper on the lower and the lower said 5.56. I didn't want any confusion down the line as to what caliber it is so I switched it with another lower I had that said multi.
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Posted: 4/26/2015 10:41:00 AM EDT
[#4]
The internet can speculate all day.
If you are really curious email the manufacturer and ask. These days I would think multi would be appropriate for a stripped lower. |
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Posted: 4/26/2015 12:20:28 PM EDT
[#5]
In the NFA world (short barreled rifles) having multi as the listed caliber is convenient to have uppers in different calibers instead of listing each caliber individually.
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Posted: 4/26/2015 1:49:45 PM EDT
[#6]
I don't see why there should be any cal marking on the lower, but if there is going to be, multi seems more appropriate.
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Posted: 4/26/2015 1:57:12 PM EDT
[#7]
Quote HistoryQuoted: In the NFA world (short barreled rifles) having multi as the listed caliber is convenient to have uppers in different calibers instead of listing each caliber individually. This doesn't make any sense. Multi doesn't cover anything and the caliber needs to be marked on an SBR somewhere. It is almost always the barrel |
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Posted: 4/26/2015 4:22:41 PM EDT
[#8]
Quote HistoryQuoted:
This doesn't make any sense. Multi doesn't cover anything and the caliber needs to be marked on an SBR somewhere. It is almost always the barrel Quote HistoryQuoted:
Quoted:
In the NFA world (short barreled rifles) having multi as the listed caliber is convenient to have uppers in different calibers instead of listing each caliber individually. This doesn't make any sense. Multi doesn't cover anything and the caliber needs to be marked on an SBR somewhere. It is almost always the barrel does it have to be visible? |
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Posted: 4/26/2015 4:28:25 PM EDT
[#9]
The ATF guide says conspicuously. Take that for what it is worth.
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Posted: 4/26/2015 5:05:15 PM EDT
[#10]
In the NFA world (short barreled rifles) having multi as the listed caliber is convenient to have uppers in different calibers instead of listing each caliber individually. ATF will reject a form 1 that says "multi" in 4c. You are not constrained to the caliber (or length) listed on the form 1. They just ask that you let them know if you no longer possess the parts listed in the original form 1 configuration so that the registry can be updated. |
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