AR15 Build question.

[Kiliker30]

Hello all, new member, first time AR builder.
I'm going to be building my first New York compliant AR15 in .300BLK.

Thinking about purchasing this upper and lower kit and then putting this thordsen stock and grip on it.
It comes with a mil spec buffer tube in the kit, my question is what size thordsen stock do I get thatll fit it? A carbine or a rifle stock?

https://palmettostatearmory.com/psa-16-300aac-blackout-pistol-length-1-8-nitride-15-lightweight-m-lok-freedom-rifle-kit-w-mbus-sight-set.html

FRS-15 Gen III Carbine Enhanced Stock Kit

SKU# 4300Q Series ***PLEASE READ THE FRS-15 RESTRICTED STATE ADVISORY*** Printable Installation Instructions U.S. PATENT NUMBER 9,823,042 PRODUCTS RELATED TO THIS ITEM

www.thordsencustoms.com

All of this will go on my psa stripped lower.
Another question.
What is the best way to deal with the barrel threads?
Can I cut them off on a 16" barrel or am I gonna be too short after?
Should I weld on a cap?
Any links for a good one to use would be appreciated. Thank you.

 

[Jem45472]

You can use a carbine stock, and pin and blind weld a cap on the barrel. It's an easy process.

 

[Jem45472]

DIY: How to Pin & Weld a Muzzle Brake

 

[Kiliker30]

You can use a carbine stock, and pin and blind weld a cap on the barrel. It's an easy process.

Thank you.

 

[ArmedCorgi]

If you are thinking of putting a pistol length upper on a lower, that isn't a pistol and has a stock meant for a rifle I would strongly advise against it. You would be making a short barreled rifle and not only are those illegal in NY but a heavily regulated by the NFA where they are legal to own.
EDIT*** Nevermind, I see it's a 16" upper that uses a pistol gas system.

 

[BDinPutnam]

If you are thinking of putting a pistol length upper on a lower, that isn't a pistol and has a stock meant for a rifle I would strongly advise against it. You would be making a short barreled rifle and not only are those illegal in NY but a heavily regulated by the NFA where they are legal to own.

Don't disagree but the kit linked above is to a 16" 300 BO upper with a pistol length gas system.

300 AAC runs best on a pistol length gas system, regardless of barrel length.

 

[Jem45472]

If you are thinking of putting a pistol length upper on a lower, that isn't a pistol and has a stock meant for a rifle I would strongly advise against it. You would be making a short barreled rifle and not only are those illegal in NY but a heavily regulated by the NFA where they are legal to own.

It's a 16" upper. 300 blk uses a pistol length gas system.

 

[Jem45472]

Don't disagree but the kit linked above is to a 16" 300 BO upper with a pistol length gas system.

300 AAC runs best on a pistol length gas system, regardless of barrel length.

Beat me by 2 seconds.

 

[BDinPutnam]

Beat me by 2 seconds.

This working from home shit has given me a bit of downtime, lol.

 

[ArmedCorgi]

Don't disagree but the kit linked above is to a 16" 300 BO upper with a pistol length gas system.

300 AAC runs best on a pistol length gas system, regardless of barrel length.

It's a 16" upper. 300 blk uses a pistol length gas system.

Beat me by 2 seconds.

I saw that and edited my post. You guys both beat me to it by 2 sec.

 

[Kiliker30]

Might be a dumb question but could I weld the pin with a solder iron will that work?
Or does it not get hot enough.

 

[JamieZ]

Doesnt get hot enough

 

[JamieZ]

Take it to a welder,,,done in 2 mins,,,pay him 10-25 bucks

 

[JamieZ]

Choose a different caliber

 

[Kiliker30]

Take it to a welder,,,done in 2 mins,,,pay him 10-25 bucks

I gotta find one thatll do it for me durring a pandemic is gonna be impossible lol

 

[BDinPutnam]

I have not done business with them but these guys have been well regarded for a while in circles I've traveled thru. They're in Ohio so I have no idea if they're currently open.

Pin/Weld Muzzle Device | Adco Firearms LLC

adcofirearms.com

 

[Jem45472]

Might be a dumb question but could I weld the pin with a solder iron will that work?
Or does it not get hot enough.

These are the only atf approved measures.



Blind pin is easiest

 

[Calculon]

I have not done business with them but these guys have been well regarded for a while in circles I've traveled thru. They're in Ohio so I have no idea if they're currently open.

Pin/Weld Muzzle Device | Adco Firearms LLC

adcofirearms.com

Thumbs up for Adco. I used them 2 or 3 times (a few years ago) and they did great work with a quick turnaround. Hopefully they’re open during this mess.

 

[dsdmmat]

These are the only atf approved measures.

View attachment 68464

Blind pin is easiest

unless he is attaching a muzzle device to a barrel less than 16 inches the Federal method really doesn’t apply. NYS does not have an approved method or disabling the threads. A lot of folks will blind pin only, some use a high temp thread locker, others will use another chemical Process. As long as the NYSP can’t take off the muzzle cap without performing gun smithing or destroying the parts/threads you should be good.

should is the operative word.

 

[Jem45472]

unless he is attaching a muzzle device to a barrel less than 16 inches the Federal method really doesn’t apply. NYS does not have an approved method or disabling the threads. A lot of folks will blind pin only, some use a high temp thread locker, others will use another chemical Process. As long as the NYSP can’t take off the muzzle cap without performing gun smithing or destroying the parts/threads you should be good.

should is the operative word.

I understand, just don't want to give information to anyone that could possibly givr them trouble.