Ar pistols. Do the muzzle devices need to be pinned?

[Staticsouls]

just like the title says. Do they need to be pinned? Even on a rimefire build?

[drifts1]

No.

[L4D]

To meet the 6" minimum it should be.

[Staticsouls]

Using a 7.5 inch on my 556 upper and a 7 inch for my 22lr. It doesn't seem like anyone else pins their barrels judging from the ar pistol pic thread, or at least they dont mention it at all.

[Rock6.3]

To meet the 6" minimum it should be.

What 6" minimum?

[echopapa]

Nope - not needed because your AR pistol will be maglocked here in CA (which allows for threaded barrel)

[MrExel17]

Thats a negative ghost rider

[umd]

What 6" minimum?

Does anyone even make an AR barrel under 6"?

[infringed711]

Does anyone even make an AR barrel under 6"?

Better question is CAN anyone make one that actually works

[Rock6.3]

Does anyone even make an AR barrel under 6"?

Absolutely yes. (Blowback systems do not require the gas tube or a specific barrel length)

[Staticsouls]

Cool thanks everyone.

[Rock6.3]

Better question is CAN anyone make one that actually works

9mm: Yes
22LR: Yes

[SkyHawk]

What 6" minimum?

So it is a compliant single shot. Only need to worry about it for initial build or DROS. Better to build or DROS with a 7.5" then after build or DROS is complete you can go whatever length barrel you want.

Threaded barrels are Ok on pistols as long as they have a mag lock / bullet button. AR pistol must have mag lock since the mag is outside the grip, so yes, you can also have a threaded barrel with a removable muzzle device.

[L4D]

What 6" minimum?

The SSE process requires a minimum 6" barrel.

[_TomT_]

If I were to buy a MK23 with an SSE threaded barrel @ 6" a mere 1/4" more than the OEM barrel, this would mean I can keep the threads? Doesn't make sense that the AR pistol can circumvent this loophole, yet a normal pistol cannot.