Lower caliber designation

Post by **iron369** » Tue Nov 17, 2015 1:17 pm

On the form 1 it asks for caliber. Since this is on the form and has to be engraved on the receiver, am I limited to the caliber I can LEGALLY shoot with the rifle? I have my stamp listed for 30cal. IS it ok to run a short barreled 223 upper?

Post by **guncrank1** » Tue Nov 17, 2015 1:44 pm

iron369 wrote:On the form 1 it asks for caliber. Since this is on the form and has to be engraved on the receiver, am I limited to the caliber I can LEGALLY shoot with the rifle? I have my stamp listed for 30cal. IS it ok to run a short barreled 223 upper?

The only makers mark that is required is name , city and state.
The caliber is made on the lower be the original maker, not by the Form 1 manufactor (you).

Unless you are the original manufactor.

So yes you, can legally shot a .223 upper

Post by **iron369** » Tue Nov 17, 2015 1:49 pm

The lower was marked as "multi". I saw it suggested several places to not put that on a form 1 so I didn't

Post by **Tyler** » Tue Nov 17, 2015 2:14 pm

iron369 wrote:The lower was marked as "multi". I saw it suggested several places to not put that on a form 1 so I didn't

Multi will get you denied and in the back of the line when you resubmit. Pick a caliber, list it on the form and shoot whatever caliber you like once you receive your permission slip.

There are some useful form 1 guides out there.

Post by **iron369** » Tue Nov 17, 2015 2:26 pm

That's what I did. Just didn't know if it limited me when it's approved.

Post by **Dustin** » Tue Nov 17, 2015 3:43 pm

No you can change the upper on your SBR to anything longer or the same barrel length that is on your form 1. They dont worry about caliber unless its a permanent change. Then you need to send the ATF a letter to update the registry.

Like mine is a 7 1/5 5.56. So I have 10.5 5.56 and 8 300 BLK. I can swap them around as long as I can put it back to the original config.

Post by **iron369** » Tue Nov 17, 2015 3:47 pm

Good deal. Thanks.

Post by **Niceguy** » Tue Nov 17, 2015 3:50 pm

This is very good to know...

Post by **Tyler** » Tue Nov 17, 2015 4:53 pm

Dustin wrote:No you can change the upper on your SBR to anything longer or the same barrel length that is on your form 1. They dont worry about caliber unless its a permanent change. Then you need to send the ATF a letter to update the registry.

Like mine is a 7 1/5 5.56. So I have 10.5 5.56 and 8 300 BLK. I can swap them around as long as I can put it back to the original config.

So you couldn't use an upper with a 6" 300blk barrel? I don't think that is correct.

Post by **guncrank1** » Tue Nov 17, 2015 6:35 pm

Tyler wrote:
Dustin wrote:No you can change the upper on your SBR to anything longer or the same barrel length that is on your form 1. They dont worry about caliber unless its a permanent change. Then you need to send the ATF a letter to update the registry.

Like mine is a 7 1/5 5.56. So I have 10.5 5.56 and 8 300 BLK. I can swap them around as long as I can put it back to the original config.
So you couldn't use an upper with a 6" 300blk barrel? I don't think that is correct.

Yes you can use that

Post by **Dustin** » Tue Nov 17, 2015 7:02 pm

From what I have read yes. But I'm not a lawyer. It's been a while since was at a holiday inn.

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Lower caliber designation

Lower caliber designation

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