Help me understand... building a ar 15 .300 blkout pistol

[okieshooter777]

IF i was building a ar15 pistol, does it have to be a "pistol" lower assembly or does can any lower be used as either pistol or rifle?

here is the lower i was looking at https://palmettostatearmory.com/complete-psa-ar-15-lower-classic-edition.html

 

[tRidiot]

Any stripped lower can be built with a pistol buffer, as long as it hasn't been previously classified as a rifle or had a buttstock assembly attached to it in the past.

In other words, you buy a stripped lower, put a pistol buffer on it, it's a pistol. If you ever swap that pistol buffer tube for a buttstock, you can't go back. If I am not mistaken, they have said if you ever put a standard buffer TUBE on it, even without putting a buttstock on that tube, that disqualifies it from going back to "pistol" configuration.

 

[okieshooter777]

Im still confused..... Pistols now can be shouldered... correct?

The lower in the link i posted... can it be used with a 10.5" upper assembly?

 

[Oklahomabassin]

My understanding is when a stripped lower is bought it is listed as a "receiver" on the 4473 so that it can be built into either a rifle or pistol.

 

[NikatKimber]

Actually you’re a little off @tRidiot.

If it was built as a rifle first, it is always a rifle.

If you build it as a pistol first, it can go back and forth. So long as it’s never in an illegal configuration. Ie: from pistol, remove <16” upper prior to installing stock. From Rifle, remove stock prior to installing <16” barrel.

For the OP: that lower cannot serve the purpose you intend. I would buy a new, stripped lower and build as a pistol lower, or buy a complete pistol lower.

 

[okieshooter777]

what if it is not a stripped lower? What if it is a complete lower? When you do FFL is this where you classify as a "pistol" or SBR?

 

[NikatKimber]

Im still confused..... Pistols now can be shouldered... correct?

The lower in the link i posted... can it be used with a 10.5" upper assembly?

Short answer: no.

Long answer: Only if the lower is registered as an SBR *prior* to installing the 10.5” upper.

 

[okieshooter777]

Actually you’re a little off @tRidiot.

If it was built as a rifle first, it is always a rifle.

If you build it as a pistol first, it can go back and forth. So long as it’s never in an illegal configuration. Ie: from pistol, remove <16” upper prior to installing stock. From Rifle, remove stock prior to installing <16” barrel.

For the OP: that lower cannot serve the purpose you intend. I would buy a new, stripped lower and build as a pistol lower, or buy a complete pistol lower.

so this one can? Seems silly, i dont see much of a difference. Maybe i am not understanding
https://palmettostatearmory.com/psa...er-flat-dark-earth-no-magazine-516447604.html

 

[NikatKimber]

what if it is not a stripped lower? What if it is a complete lower? When you do FFL is this where you classify as a "pistol" or SBR?

The “receiver” option on the 4473 only applies if it is a stripped/unassembled lower. If it is assembled/complete, then it would transfer either as “rifle” (if it has a stock), or “pistol” (if just a tube or brace).

 

[okieshooter777]

NikatKimber, the first lower i listed in orignial post, can it be registered as an SBR *prior* to installing the 10.5” upper?
So when filling out the FFL paperwork, it can be registered as a SBR?