A 14.5" SBR - am I crazy?

Melnic · Jan 18, 2020

So I pulled some stuff out to look
Carbine at the top has a 15” sight radius
Mid length is 2 in more so that would be 17”
Rifle gives me 19 3/4”
I don’t have a clamp on but my SBR has front sight on the full length hand guard and it’s just at 15 1/4”. If I had a clamp on or maybe something sticking up fixed at the edge of that handguard I could probably get that to 16”

Don’t mock that SBR setup, the scope and rear sight placement is just temporarily till I figure out some reloads for it

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Steve_Zissou · Jan 18, 2020

If you're wed to the classic handguard and the non-floated FSB you could always go for a dissipator...

Melnic · Jan 18, 2020

Steve_Zissou said:
If you're wed to the classic handguard and the non-floated FSB you could always go for a dissipator...

I think the OP was trying to keep it light and not go HBAR. I can understand that.
I have a rifle length gas 16" barrel dissipator from Delton which was my first HBAR. It came with a light spring and you really gotta use it. Shooting that longer sight radius really helps but the weight when shooting offhand is noticeable (i'm not a big guy) compared to that light M4 profile carbine.

3paul10 · Jan 18, 2020

Fellas, why not make it a 14 5 pistol?

outrider58 · Jan 18, 2020

3paul10 said:
Fellas, why not make it a 14 5 pistol?

Cuz I don't got that much room in my pocket?

outrider58 · Jan 18, 2020

calicojack said:
Yes - but the BCM offering I cited is actually a mid length. Even so, the Colt in carbine length is still well worth considering.

You go mid length on a 14.5 and you'll probably have to keep it over gassed to shoot a lot of hand loads/commercial ammo. Not a lot of dwell time there...

Ammo Jon · Jan 18, 2020

My 10.5 pistol built to match my rifle.

calicojack · Jan 19, 2020

outrider58 said:
You go mid length on a 14.5 and you'll probably have to keep it over gassed to shoot a lot of hand loads/commercial ammo. Not a lot of dwell time there...

A lot of great feedback here. I am leaning towards just getting a Colt barrel with a sight tower already attached and then building it out myself. I know AR pistols are less money and paperwork, but then I don't have to worry whether or not I can shoulder it (ATF policy of the month), no issues with a vertical grip, etc. Still mulling it all over.

OBTW Ammo Jon; nice build!

woodline · Jan 19, 2020

FWIW your OAL will be fine for pistol grip with a 14.5" barrel on a an AR pistol. I have an SBA3 brace specifically for the purpose of making all my future SBRs into pistols first. So that I can use them while waiting for ATF approval and so later I can run them in whichever configuration makes sense for what I am doing/where I am. Though I suppose at this point you could just announce out loud "THIS IS AN AR PISTOL" after you put the buffer tube on but before you put a rifle stock on, and you would have accomplished a similar feat. (being tongue in cheek here)

At any rate I prefer SBRs to pistols myself, and understand why you'd want to do it. Plus no need to pin and weld, which is nice. I am doing a 12.5" build with a dedicated short suppressor (YHM turbo K). I could have picked a more pin and weld friendly suppressor for the project and made it a one stamp gun, but I'm building it how I want and am happy with it the way it is.

3paul10 · Jan 19, 2020

Ammo Jon said:
My 10.5 pistol built to match my rifle.

Them are pretty. ")

Ammo Jon · Jan 19, 2020

3paul10 said:
Them are pretty. ")

Don’t even get me started on the MagPul hand guards!

atblis · Jan 19, 2020

They are clearly using an older MSP opinion that anything that doesn't have the M203 cut is good to go as being an HBAR. I don't think that one is considered valid anymore.

Pinecone · Jan 19, 2020

atblis said:
They are clearly using an older MSP opinion that anything that doesn't have the M203 cut is good to go as being an HBAR. I don't think that one is considered valid anymore.

I would not want to be the test case.

But calling an original AR barrel legal is setting someone up to BE that test case.

Melnic · Jan 20, 2020

oops posted to wrong thread

Ranchero50 · Jan 20, 2020

calicojack said:
A lot of great feedback here. I am leaning towards just getting a Colt barrel with a sight tower already attached and then building it out myself. I know AR pistols are less money and paperwork, but then I don't have to worry whether or not I can shoulder it (ATF policy of the month), no issues with a vertical grip, etc. Still mulling it all over.

OBTW Ammo Jon; nice build!

I did the colt barrel and pinned longer flash hider to be barrel length legal. Leaps and bound more ergonomic versus a 16" heavy barrel and standard flash hider screwed on. Plus you can mount a pig sticker for crowd control.

A 14.5" SBR - am I crazy?

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