AR pistol lowers

[SnowStorm]

[enorbit3]

Maglock. 10 rounds MAX. No VFG. LOP must not exceed 13.5 inches I believe. Braces are ok.

[Spyder]

Maglock. 10 rounds MAX. No VFG. LOP must not exceed 13.5 inches I believe. Braces are ok.

I haven't yet heard of anything about a legal requirement for length of pull?

[SnowStorm]

Maglock. 10 rounds MAX. No VFG. LOP must not exceed 13.5 inches I believe. Braces are ok.

[enorbit3]

See here

https://www.google.com/amp/s/www.usconcealedcarry.com/blog/keeping-your-ar-15-pistol-build-within-legal-limits/amp/

[C.G.]

Make sure it is transferred as semi-auto pistol lower.

[SISKIN]

AR Maglock w/Kingpin works just fine..I did have to do a little fine tunning to get it to work really smooth to my liking.Don't let the Maglock thing keep you from getting what you want..Because like my mother used to say "Something will always come up"......

[Frasier19]

[ar15barrels]

There are currently two AR lowers registered as semi auto pistols in the marketplace.

I previously had been interested in building up an AR pistol back in the day when they were legal with SSE1 and an 80% lower.

My questions are:

1) is it really as simple as transferring the lower and then be good to go?

2) what configuration would make it legal?
It doesn’t have a stock to make it fixed, is the only option to use a magazine lock in one of the current options?

The stripped lower needs to be DROSed as a semi-auto or it would not be legal to assemble it as one afterwards.
This is important to make sure the FFL you use will do it that way.

The ONLY way to make a semi-auto AR type pistol legal today is by fixing the magazine into the action so that it can not be removed without disassembly of the action.
There is no "featureless" option like on rifles because the magazine well outside of the pistol grip IS a feature on a semi-auto centerfire pistol.

Another option is to make it NOT semi-auto.
Then you can have a detachable magazine.

[ar15barrels]

I haven't yet heard of anything about a legal requirement for length of pull?

BATF has determined a pistol brace to BE a stock if the length of pull is 13.5" or longer.
This is problematic for many of the side folding stock adapters because they cause the length of pull to exceed 13.5".
If running a side-folding adapter, you need to limit the length of pull to stay under 13.5" or the BATF says you have an illegal SBR.

[ar15barrels]

Like the OP I am looking to build an AR pistol and keep it.
But can you later sell PPT the legally configured AR pistol
you assembled from the stripped lower?

Again, assuming one has originally acquired a stripped lower
correctly drosed as a semi-auto pistol lower which is originally
drosed as frame only. I wasn’t sure if you have to sell it separated
or it can be sold as assembled which “not frame only” and drosed that way.

I see some in the marketplace where seller says they will separate the upper.
Is there a difference selling an assembled AR pistol from a stripped lower
versus one purchased years ago fully assembled?

Some FFL's will not DROS a stripped reciever as a SEMI-AUTO because technically, a stripped receiver CAN NOT BE SEMI-AUTOMATIC.
The solution to use such an FFL for the private party transfer is to DROS the whole gun and then meet the seller afterwards and strip all the parts BACK OFF the lower.

[naz]

Guys how is an AR pistol to shoot indoors compared to an AR rifle?

Is the muzzle flash bigger and it is louder? Does it help to use 300blk or another cartridge instead of 5.56?

[sbo80]

^ generally, the shorter the barrel, the louder the boom. My 7.5" in 5.56 was a teeth rattler at the indoor range. I switched to 10.5" in .300BLK with a blast deflector and it's much more pleasant. Some people like the boom, YMMV.

[sigstroker]

LOL, I can't imagine shooting one indoors. My 10.5 incher literally set off the truck alarms in the parking lot behind me. That was with a flash hider. With a brake it would be much worse.

[naz]

LOL, I can't imagine shooting one indoors. My 10.5 incher literally set off the truck alarms in the parking lot behind me. That was with a flash hider. With a brake it would be much worse.

Thanks for confirming.

I was interested in an AR pistol for a hot minute, since it would be a lot more convenient to use for HD than my rifle. But all the negatives discussed in this thread just really stack up.

If / when I move out of state, registering for sbr and suppressor will be at the top of my to-do list. Lol.