Multiple caliber kits / conversions question about serial number

[Ronws]

Probably a stupid question and I am good at that.

When Hornady came out with the 7 mm PRC, they pointed out that if you already had a 7 mm Rem Mag or .300 Win Mag, you could swap barrels and even use the same bolt face.

LIke any rifle where you might replace a barrel or trigger assembly, you don't need a 4473 federal transfer. Because those are replacable and not serialized. The receiver is holds the serial number.

So, if you put a 7 PRC barrel on a .300 WM receiver, is it still legally a .300 WM, which is what it was when you bought it and transferred with a Form 4473?

Do you run afoul if you don't file a change of caliber associated with that receiver?

Does it matter? The SOCOM MRAD, which you can buy, has .308 Win, .300 Norma Mag, and .338 Norma Mag barrels and parts. Only one receiver presumably having the serial number.

I try to foresee ways the commies could come at us and worry about crap like this.

 

[_Windrider_]

Probably a stupid question and I am good at that.

When Hornady came out with the 7 mm PRC, they pointed out that if you already had a 7 mm Rem Mag or .300 Win Mag, you could swap barrels and even use the same bolt face.

LIke any rifle where you might replace a barrel or trigger assembly, you don't need a 4473 federal transfer. Because those are replacable and not serialized. The receiver is holds the serial number.

So, if you put a 7 PRC barrel on a .300 WM receiver, is it still legally a .300 WM, which is what it was when you bought it and transferred with a Form 4473?

Do you run afoul if you don't file a change of caliber associated with that receiver?

Does it matter? The SOCOM MRAD, which you can buy, has .308 Win, .300 Norma Mag, and .338 Norma Mag barrels and parts. Only one receiver presumably having the serial number.

I try to foresee ways the commies could come at us and worry about crap like this.

It’s registered as multi cal just like your ar15. It really it’s rather a rifle or a pistol. The caliber is irrelevant

 

[strikeeagle1]

Way over thinking this to my manner of resolution. Unless you are going to create a short barrel rifle on said receiver, I don't believe
it matters what caliber barrel is attached to the legal receiver.

 

[Ronws]

So, setting aside the multi-caliber AR-15 or AR-10 kits, if I have a .300 WM and change barrels to a 7 PRC, is it still legally a .300 WM?

That is, if it was purchased as a .300 WM and described as such on the 4473 during transfer, is it still legally a .300 WM in spite of having a 7 PRC barrel on it?

 

[_Windrider_]

So, setting aside the multi-caliber AR-15 or AR-10 kits, if I have a .300 WM and change barrels to a 7 PRC, is it still legally a .300 WM?

That is, if it was purchased as a .300 WM and described as such on the 4473 during transfer, is it still legally a .300 WM in spite of having a 7 PRC barrel on it?

No it’s still legally a rifle

 

[roostercogburn98]

So, setting aside the multi-caliber AR-15 or AR-10 kits, if I have a .300 WM and change barrels to a 7 PRC, is it still legally a .300 WM?

That is, if it was purchased as a .300 WM and described as such on the 4473 during transfer, is it still legally a .300 WM in spite of having a 7 PRC barrel on it?

I got a few Remington model 7 receivers marked 300 blackout that are not that caliber anymore. The FFL don’t really care what caliber goes on the 4473 as long as the model and serial number are correct

 

[oldnewguy]

Call your local ATF field office and ask for the Change of Caliber form.

 

[hafejd30]

MRAD, AI and DT shooters swap barrels and calibers all the time. I see no issues

If you update your caliber don’t forget to update the OAL of the weapon. That’s probably on there to

 

[roostercogburn98]

Call your local ATF field office and ask for the Change of Caliber form.

Do they keep that with the boxes of grid squares?

 

[Mike Casselton]

So, setting aside the multi-caliber AR-15 or AR-10 kits, if I have a .300 WM and change barrels to a 7 PRC, is it still legally a .300 WM?

That is, if it was purchased as a .300 WM and described as such on the 4473 during transfer, is it still legally a .300 WM in spite of having a 7 PRC barrel on it?

I think you might be confused about the requirement for a revolver to have its caliber marked on the frame.
You can still use different cylinders for other chamberings, but the caliber has to be on the frame.

Every semi-auto pistol I own has the caliber/chambering marked on the slide, not on the serialized frame.

No such requirement exists for rifles.
The caliber/chambering is marked on the barrel, as required.

 

[Ronws]

I was talking about rifles but I think I figured it out. As far as the dog killers are concerned, the rifle entered your ownership as a .300 Win Mag.

You change it, with the same serial number on the receiver or action, to a 7 PRC. That won't matter until you transfer again and it is just small type to note the caliber.

If there was an investigation involving the rifle, it might be tracked down and noted that it was sold as a .300 Win Mag and they would have to find where you bought it from because that location would have the 4473 on file.

 

[_Windrider_]

I was talking about rifles but I think I figured it out. As far as the dog killers are concerned, the rifle entered your ownership as a .300 Win Mag.

You change it, with the same serial number on the receiver or action, to a 7 PRC. That won't matter until you transfer again and it is just small type to note the caliber.

If there was an investigation involving the rifle, it might be tracked down and noted that it was sold as a .300 Win Mag and they would have to find where you bought it from because that location would have the 4473 on file.

again, no. what if you transfer the receiver with no barrel.........what caliber is it? the AFT does not care what caliber it is. they only care whether its a rifle a pistol or an SBR.

 

[Ronws]

again, no. what if you transfer the receiver with no barrel.........what caliber is it? the AFT does not care what caliber it is. they only care whether its a rifle a pistol or an SBR.

So I have gathered. I was overthinking it.

Thanks, guys.