I Bought A Stripped Lower. Unsure Of The Process To Build Own AR With CFO

Peerless

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Hello,

I bought a stripped aero precision stripped lower to keep the numbers up and eventually will build an AR but not sure how the process works. I understand if you buy the stripped lower its considered a restricted piece of equipment. Do you get a registration certificate for the stripped lower? How do you register the firearm after you do the build length of barrel etc.

I picked up a stripped lower yesterday and just not sure how the whole build your own works. any info/advice appreciated. Cheers.

Peerless.
 
Your Cert. should note that it is a Receiver only in some way...can't remember how mine was described. What you are supposed to do is when you have a complete upper for the lower call the CFO and report the "change", providing them with barrel length/cartridge. There's a bit of grey here as you have so many days to report the "change", I'll let someone else explain that in detail.
 
When the transfer is approved, you will receive authorization to take possession. In due course the registration certificate will arrive. You must store the stripped lower receiver in a locked container, disabled by a locking device. The registration certificate sheet will include an instruction that you must report changes to the receiver which result in it being capable of discharging a shot.
When you decide to complete the project, acquire the rest of the parts, and assemble them.
 
Keep the registration as "receiver only" and start building your rifle. Once you have your build complete call to update your registration as a firearm. They will ask for the barrel length. It is somewhat un-necessary for an AR since any barrel length is still "restricted". They will send you an new registration certificate after that.

Hello,

I bought a stripped aero precision stripped lower to keep the numbers up and eventually will build an AR but not sure how the process works. I understand if you buy the stripped lower its considered a restricted piece of equipment. Do you get a registration certificate for the stripped lower? How do you register the firearm after you do the build length of barrel etc.

I picked up a stripped lower yesterday and just not sure how the whole build your own works. any info/advice appreciated. Cheers.

Peerless.
 
Thanks everyone for the info!

Add on question:
What if I have more than one upper? Do I still have to pick one upper to register as a full firearm or can I leave it as a registered lower?
 
Thanks everyone for the info!

Add on question:
What if I have more than one upper? Do I still have to pick one upper to register as a full firearm or can I leave it as a registered lower?

Keep it as a registered lower and just put any upper on it once you are in the shooting range. Keep your multiple uppers and lower separated while transport and storing. That way you can keep the lower registered as a "receiver" only.
 
when i did mine i picked up multiple uppers.
what i did was i picked one upper that i leave on the gun all the time and that was the one i called the CFO about and had the certificate changed to show.
the other uppers i just take along with me to the range and swap out at the range if i want to use, then once done put the main upper back on.
 
Keep it as a registered lower and just put any upper on it once you are in the shooting range. Keep your multiple uppers and lower separated while transport and storing. That way you can keep the lower registered as a "receiver" only.

Can this also be applied to those who only own one upper?
Second part to this....
Do they need to be in seprerate cases or can they be transported in the same case but broken down?
 
Can this also be applied to those who only own one upper?
Second part to this....
Do they need to be in seprerate cases or can they be transported in the same case but broken down?

You can transport the whole thing fully assembled. It's the lower that's the actual "firearm", and needs to be registered, have the cert for it, in a locked case and trigger locked. The upper is a tube. It can be any upper, any length, any caliber. Makes no difference. It can be attached to the lower "ready to go", apart, on your lap, in another bag........whatever.

FWIW, i always transported my ARs fully assembled to/from the range or the border.
 
When the transfer is approved, you will receive authorization to take possession. In due course the registration certificate will arrive. You must store the stripped lower receiver in a locked container, disabled by a locking device. The registration certificate sheet will include an instruction that you must report changes to the receiver which result in it being capable of discharging a shot.
When you decide to complete the project, acquire the rest of the parts, and assemble them.

Keep it as a registered lower and just put any upper on it once you are in the shooting range. Keep your multiple uppers and lower separated while transport and storing. That way you can keep the lower registered as a "receiver" only.

Being in possession of a fully assembled lower and multiple uppers while the reg. cert. says "frame/receiver only" may result in a great deal of hurt feelings.

Once your build is complete, you have 30 days to call the CFO and have the registration updated.

And no, you cannot take it to the range and test fire until it is registered properly.
 
Being in possession of a fully assembled lower and multiple uppers while the reg. cert. says "frame/receiver only" may result in a great deal of hurt feelings.

Once your build is complete, you have 30 days to call the CFO and have the registration updated.

And no, you cannot take it to the range and test fire until it is registered properly.

So you’re saying once there is an upper available to go in it, it must be re-registered as a complete?
 
When the transfer is approved, you will receive authorization to take possession. In due course the registration certificate will arrive. You must store the stripped lower receiver in a locked container, disabled by a locking device. The registration certificate sheet will include an instruction that you must report changes to the receiver which result in it being capable of discharging a shot.
When you decide to complete the project, acquire the rest of the parts, and assemble them.

So you’re saying once there is an upper available to go in it, it must be re-registered as a complete?

Vladimir Lenin once said: "Don't trust everything you read on the Internet."

Call the CFO and ask for clarifications. This should take 5 min of you time tops.
 
Last edited:
So you’re saying once there is an upper available to go in it, it must be re-registered as a complete?

Once the lower is complete and fully functional, you have to call the CFO and let them know. Whether you have a specific upper for it or not, since it’s the lower that gets registered as the firearm. They’ll then issue you a new reg cert for it. They’ll ask you the barrel length as a matter of procedure.

That’s how it went for me for the 2 stripped lowers I built out. Both times, I didn’t have uppers for them yet, but I just said they are 16” barrels.
 
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