Building another Non NFA SBR

[SteyrAug]

Enjoying my TACSOL non NFA SBR in 300 B/O. With subs and the GEMTECH ONE can it is just "chuff", chuff".

It was an expensive upper at $1200 TMD. As I examined it and read the regs, it was clear that the two critical critera are:

1. The barrel extension must bring the barrel length to 16".
2. The barrel extension must be pinned and welded/silver soldered/brazed to the rifled portion of the barrel.

I purchased a basic 10.5" upper that had a short Monstrum Handguard. Monstrum also makes a 16" handguard. I bought one of these.

With the 16" handguard mounted, I had my legal length bbl extension. To make it legal, the extension has to be attached to the barrel.

The handguard over the bbl nut, the bbl nut will be drilled and tapped for 4 8-32 aluminum screws. The barrel will also be drilled to allow those screws to lock into it. After assembly, the screw heads will be ground flush with the handguard.

The headless screw is now welded to the handguard with specialized aluminum welding rod.

Now it will be impossible to remove the handguard (barrel extension) or barrel without destructive drilling and cutting.

The end of the short barrel inside the extension is fitted with a GEMTECH quick lock muzzle brake. The suppressor may now be inserted inside the barrel extension and locked on to the quick lock. The oal is 17.5" which is a lot less than putting the can on the end of a conventional 16" bbl.

Shown below is the 300 B/O. The 223 one will look about the same, except the extension will be one piece rather than the TACSOL method of using a short 2 piece handguard with the extension welded/pinned just behind the muzzle of the short barrel. The advantage of the TACSOL method is that the upper can be fitted with a new barrel, but it also costs three times as much as my design.

What do you think ?

 

[Marine Cpl]

I think you are a doofus for putting such a big scope on a short barreled rifle that isn't really a rifle because it can't reach anything past 25 yards accurately because the barrel has no rifling.

 

[FrankenCub]

I think you are a doofus for putting such a big scope on a short barreled rifle that isn't really a rifle because it can't reach anything past 25 yards accurately because the barrel has no rifling.

Tacticool Playa

 

[SteyrAug]

Guess Willie went to school in NY and got two A+ marks in Black studies and Womens studies BUT a F in reading comprehension.

To repeat: "I purchased a basic 10.5" upper that had a short Monstrum Handguard." An upper is made up of a receiver, barrel and handguard (at minimum) DUH !

Hey Willie, it has a 10.5" rifled barrel ! With that HUGE scope, it has no problem ringing a 12" gong at 300 yards.

You really need to read up on the capabilities of a heavy bullet in a 300 B/O !

 

[Robin]

Not sure what to think at this point. Just what are you trying to achieve?
Robin

 

[GUNSICK]

I doubt the ATF would consider a handguard as a barrel extension no matter how it’s attached. Your barrel is still 10.5” long.

P.S. Your a douche bag.

 

[Marine Cpl]

Guess Willie went to school in NY and got two A+ marks in Black studies and Womens studies BUT a F in reading comprehension.

Hey Willie, it has a 10.5" rifled barrel ! With that HUGE scope, it has no problem ringing a 12" gong at 300 yards.

You really need to read up on the capabilities of a heavy bullet in a 300 B/O !

I was under the impression that it was that new barrel with no rifling to get past ATF laws because if having no rifling, it's neither a rifle, pistol, or shotgun.

But since you say it does have rifling, and the muzzle device is part of the barrel, putting such a large scope on a rifle that is designed for silenced CQB is ridiculous. My only guess as to why you put scopes on everything is that you are blind. A weapon like that is designed for close quarters. Hence the short barrel. If it were designed for distance, barrel length wouldn't be an issue.

And .300 Blackout isn't a distance caliber either with it's rainbow trajectory. It's a CQB caliber. Especially when used with subsonic loads which you have to use with a silencer attached.

Dummy.

 

[Airborneguy]

Not sure what to think at this point. Just what are you trying to achieve?
Robin

Prove that the mods don’t care.

 

[SteyrAug]

Let's start with Willie. The 300 B/O works very well at longer ranges if you know your ballistics and distances. The 45-70 was "designed" as a military cartridge but it killed far more Buffalo than Indians and Spaniards.

As for AB guy, why is passing along information something the mods should care about ? Not everyone on this site lives in Newyorkistan.
Seems like you should apply for mod status .... then you could censor everyone you disagree with OR who knows more than you.

Robin, what I am achieving (not trying) is to have a suppressed AR15 with an OAL about the same as a standard 16" barrel. Makes for a shorter, better balanced rifle ---- especially in a vehicle, while avoiding the need for NFA registration.

 

[Marine Cpl]

Let's start with Willie. The 300 B/O works very well at longer ranges if you know your ballistics and distances. The 45-70 was "designed" as a military cartridge but it killed far more Buffalo than Indians and Spaniards.

For that configuration of gun you have with a silencer, subsonics are supposed to be used. How much distance do you think you'll be getting at about 1000 fps?

 

[SteyrAug]

Willie, you REALLY need to "read before typing". Chuckle !

"Hey Willie, it has a 10.5" rifled barrel ! With that HUGE scope, it has no problem ringing a 12" gong at 300 yards."

What part of 300 yards escaped your eagle eye ?

BTW, since the can is rated up to 300 winmag, supersonics work just fine. Quieter but not a "chuff". Still removes directionality which is a great feature of a can.

Keep digging !

 

[Airborneguy]

I can express my distain for jerkoffs quite well without being a mod.

 

[SteyrAug]

Yes AB you can, but when your only contribution is verifying what a dolt you are as well as threatening another member, your post does little to advance your reputation.

Now, tell us about your combat jumps !

 

[freddy]

Man, I would LOVE to build a suppressed 300BO!

 

[Airborneguy]

Threaten? Lol you’re a special kind of bitch if you feel threatened by anything I’ve said.

 

[SteyrAug]

Freddy, I'm afraid you probably cannot if you're in NY. One of the many reasons I left in 2000. I also find I can afford a lot more toys since I'm not supporting a bankrupt oligarchy.

Can some one tell me how to avoid seeing this fake parachutist's posts ?

 

[Marine Cpl]

Can some one tell me how to avoid seeing this fake parachutist's posts ?

Funny. I'll give you that.

 

[SteyrAug]

So what vital military role do you fufill in Orange county, protecting us from the Islamic terrorists ?

 

[Sixbennetts]

 

[Marine Cpl]

So what vital military role do you fufill in Orange county, protecting us from the Islamic terrorists ?

I jump out of helicopters.

 

[carpediem]

 

[SteyrAug]

Requires a room temp IQ. One thing I learned in USAF is "never jump out of a perfectly good airplane."

Was unaware ISIS had invaded Orange county ---- although the number of Mosques in NY, it's conceivable.

 

[Robin]

Air force isn't the military.
Robin

 

[SteyrAug]

Robin, where were you 1964-70 ? Why do I doubt anywhere people were shooting at you.

 

[Robin]

Well, let me think. Avon, Caledonia, Lima, Rochester, Irondiquoit, livonia, Canada, Pennsylvania, Maryland, Virginia, New Jersey, Horseheads, Canandagua, Conesus Lake, Brighton, Pittsford, Chili, Henrietta, New Jersey, Louisiana, Texas, California, Alaska, Ben Hoa, Phu Bai, Rhou Nou Valley, A Shau Valley, Phu Loc, Bach Ma, Japan, Washington D.C., Cape Cod, Florida, Canada, Avon. Thats a few, but I used to get around a lot more back then.
I don't know why you would doubt that which was not told to you.
Robin

 

[SteyrAug]

HMM, if you were in those places in the RVN and getting shot at, I wonder who was providing CAS for you ? And who was bombing the s--- out of the supplies being carried down to kill you ? And who finally bombed North Vietnam to the point where they came to the table and let you come home ?

Now why after seeing the real world you would come back to nowhere NY is another question AND then hang around to endure the complete collapse of the Empire State to the Welfare State ?

Can you imagine how much richer and more free you would be had you stayed in TX or FL ?

You really think these guys were "not in the military" ? You're not fit to shine their shoes !

 

[Robin]

"And who was bombing the s--- out of the supplies being carried down to supply you ?"
So you guys were bombing our supply lines, damn! The cocoon's, hah!
We had our own Air Force, and it was, Kick Ass!

The guy on point would be me, cept I wore a boonie hat.
I could put a spit shine on my kicks in a NY second. AF guys got an Article 15 if they shined with anything but a Hershey bar.
So what was your job, make sure their windshields were clean and the thermos had a beverage of choice?
Robin

 

[SteyrAug]

You don't have the clearance to know what I did.

Uh one M-60 is hardly an "air force".

I doubt one of your "slicks could do this:

 

[Robin]

Yeah, yeah, Me and my guys were the only grunts in VN, everyone else was a super snooper seal, force recon green beret. If I had a nickel for every time I've heard that dime story bullshit I could get drunk this afternoon, and tomorrow too. I may anyway.
You may doubt what our slicks could do, but I know first hand, and you would pee your pants to experience it first hand, for us, it was Christmas and the Fourth of July all rolled into one bid fiery tumultuous ball of goodies, Makes me all warm and fuzzy upon reflexion, I think I will get drunk this afternoon, maybe toast the AF in appreciation for this timely inducement!
Funny, my clearance gave me access to everything classified, in a military manner, but I can't know how many dip sticks some guy on the internet checked, the irony, yep, drunk it is. I'll toast those brave men in their fancy flying machines, and pass on the tire kickers, the Jock's would understand.
Robin Hic

 

[SteyrAug]

Uh no you don't have the clearances ? SIOP, ESI, POTUSEO, TSNTN ----- I thought not. Most grunts got Secret at most, ask me how I know ---chuckle !