AR45 or AR9? Conversion kits?

[Knebel]

Well I have done the 9mm with endomag. Maybe ill do a 45 in the future...

 

[arakboss]

Well I have done the 9mm with endomag. Maybe ill do a 45 in the future...

I am thinking about trying a 45acp build using this lower as I already have G21 mags on hand.

Spartan-45ACP Glock Magazine Compatible Billet Lower Receiver

Spartan-45ACP Glock Magazine Compatible Billet Lower Receiver

www.joeboboutfitters.com

This barrel:

OE-SPEC Contract 45ACP 16" AR15 Barrel- Nitride

Experience precision and performance like never before with our nitride-Coated 45 ACP 16" AR-15 barrel. This meticulously crafted barrel is designed to redefine your shooting capabilities, ensuring enhanced accuracy and durability. The advanced nitride coating minimizes friction and maximizes...

www.kakindustry.com

And one of these bolts:

https://www.spintaprecision.com/45-acp-nitride-bolt-carrier-group-for-ar-15-sale/

Kaw Valley Precision AR-15 45 ACP Blow Back Bolt Carrier Group

Kaw Valley Precision AR-15 45 ACP Blow Back Bolt Carrier Group

www.joeboboutfitters.com

The only other parts I might need are buffer related parts.

 

[rdb241]

I originally built this back in the 90s and recently updated the upper. .45 acp. My favorite carbine that has won me a few trophies in competition shoots. I love this gun and have had it for 26 years.

 

[arakboss]

I originally built this back in the 90s and recently updated the upper. .45 acp. My favorite carbine that has won me a few trophies in competition shoots. I love this gun and have had it for 26 years.

View attachment 1037487

It looks like fun gun.

 

[arakboss]

I originally built this back in the 90s and recently updated the upper. .45 acp. My favorite carbine that has won me a few trophies in competition shoots. I love this gun and have had it for 26 years.

View attachment 1037487

What weight buffer and spring type are you currently running in it?

 

[arakboss]

If I bought one of these bolts and a 10mm barrel I could cover 10mm and probably shoot 40 put it too. So many options and so little time.

Kaw Valley Precision AR-15 40 S&W / 10MM BlowBack Bolt Carrier Group

Kaw Valley Precision AR-15 40 S&W / 10MM BlowBack Bolt Carrier Group

www.joeboboutfitters.com

Here is in stock barrel:

Kaw Valley Precision AR-15 16'' 10MM 4150 QPQ AR-15 Barrel

Kaw Valley Precision AR-15 16' 10MM 4150 QPQ AR-15 Barrel

www.joeboboutfitters.com

 

[arakboss]

If I bought one of these bolts and a 10mm barrel I could cover 10mm and probably shoot 40 put it too. So many options and so little time.

Kaw Valley Precision AR-15 40 S&W / 10MM BlowBack Bolt Carrier Group

Kaw Valley Precision AR-15 40 S&W / 10MM BlowBack Bolt Carrier Group

www.joeboboutfitters.com

Here is in stock barrel:

Kaw Valley Precision AR-15 16'' 10MM 4150 QPQ AR-15 Barrel

Kaw Valley Precision AR-15 16' 10MM 4150 QPQ AR-15 Barrel

www.joeboboutfitters.com

Looks those 10mm products are OOS.

 

[rdb241]

What weight buffer and spring type are you currently running in it?

Back when I built it, we did not worry about all that technical stuff. It is a AR15 carbine buffer and spring. What weight? I have no clue. It has always run like a Swiss clock and has never failed me.

 

[Idaho44]

Two dedicated 9 mm lowers (joe bob's), Torkmag adapter (glock mags) and BFR adapter (colt mags) have all worked well. But I am not a high volume shooter, just like them for the fun factor.

 

[FourTeeFive]

My personal opinion is you gain a lot more with a carbine barrel in terms of velocity with 9mm vs 45ACP, so 9mm seems a more sensible choice to me. That said, I still kind of want a 45ACP carbine. Just because.

 

[wired]

More energy with the 45

 

[Knebel]

Oh now I am getting ideas too lol.

I put my 9mm together with a 5" barrel and a long (4.5" i think) forward compensator. I can get about 1350fps out of it with 115grain. The same ammo did 1200fps out of my polymer 80 G17 build. Just under 1200fps out of my SS80 G43.

I wonder what velocity the 45acp could produce?

 

[spookshack]

This may give you a rough idea on velocity.

BBTI - Ballistics by the Inch :: Results

(statement of intent)

ballisticsbytheinch.com

 

[wired]

Oh now I am getting ideas too lol.

I put my 9mm together with a 5" barrel and a long (4.5" i think) forward compensator. I can get about 1350fps out of it with 115grain. The same ammo did 1200fps out of my polymer 80 G17 build. Just under 1200fps out of my SS80 G43.

I wonder what velocity the 45acp could produce?

A banshee 45 Upper can run 45 super no problem. That's about 1300 FPS with 185 grain ammo.

 

[rdb241]

OK, I posted my AR45 earlier that I originaly built 26 years ago but at the same time I also have built a cuople of 9mms as well. I built the Carbine 6 years ago and the pistol shortly after. Way before Inslee's BS untracable/undectable thing was introduced. I built the carbine from an 80% polymer receiver and the pistol from an 80%er aluminum receiver. I recent added the pistol brace and tube to the pistol thanx to Saffir here on the forum and I really like it.

 

[arakboss]

I am thinking about trying a 45acp build using this lower as I already have G21 mags on hand.

Spartan-45ACP Glock Magazine Compatible Billet Lower Receiver

Spartan-45ACP Glock Magazine Compatible Billet Lower Receiver

www.joeboboutfitters.com

This barrel:

OE-SPEC Contract 45ACP 16" AR15 Barrel- Nitride

Experience precision and performance like never before with our nitride-Coated 45 ACP 16" AR-15 barrel. This meticulously crafted barrel is designed to redefine your shooting capabilities, ensuring enhanced accuracy and durability. The advanced nitride coating minimizes friction and maximizes...

www.kakindustry.com

And one of these bolts:

https://www.spintaprecision.com/45-acp-nitride-bolt-carrier-group-for-ar-15-sale/

Kaw Valley Precision AR-15 45 ACP Blow Back Bolt Carrier Group

Kaw Valley Precision AR-15 45 ACP Blow Back Bolt Carrier Group

www.joeboboutfitters.com

The only other parts I might need are buffer related parts.

I am still tossing around the idea of an AR45 build. I found cheaper prices on barrel and bolt but a dedicated glock 45acp/10mm lower is still running about $150 shipped from Joe Bobs. Slick side upper and barrel are $124 total shipped from Gorilla Machining and a KAK bolt is about $115 from DTT. This set up would allow me to easily change over the barrel to 10mm when a deal comes along on a 10mm barrel.

Any reason to think these components will get much cheaper in the near future?

 

[DirectDrive]

I am still tossing around the idea of an AR45 build. I found cheaper prices on barrel and bolt but a dedicated glock 45acp/10mm lower is still running about $145 shipped from Joe Bobs. Slick side upper and barrel are $124 total shipped from Gorilla Machining and a KAK bolt is about $115 from DTT. This set up would allow me to easily change over the barrel to 10mm when a deal comes along on a 10mm barrel.

Any reason to think these components will get much cheaper in the near future?

Pretty inexpensive compared to what other people (me) are paying...

Big Tex (GLF) .45ACP Lower Receiver

Quarter Circle 10, The AR Pistol Caliber BRAND. Leader in top of the line, dedicated AR15 Pistol Caliber parts. Glock Large Frame Lower Receiver

www.quartercircle10.com

 

[DirectDrive]

If I wanted a Glock pattern AR9 I would snoop around this (among others) website :

Angstadt Arms | Modern Personal Defense Weapons

Angstadt Arms is a type 07 small arms manufacturer. We specialize in compact, lightweight personal defense weapons (PDW) for civilians and law enforcement.

angstadtarms.com

 

[arakboss]

If I wanted a Glock pattern AR9 I would snoop around this (among others) website :

Angstadt Arms | Modern Personal Defense Weapons

Angstadt Arms is a type 07 small arms manufacturer. We specialize in compact, lightweight personal defense weapons (PDW) for civilians and law enforcement.

angstadtarms.com

I picked up a glock pattern PSA 9mm/40 lower from a WA member a while back but haven't put it together yet. I have multiple 9mm uppers already but none for the 45 or 10mm cartridge.

I would jump on this pistol length 45acp upper if it came with bolt: https://www.deltateamtactical.com/d...barrel-m-lok-handguard-assembled-or-8697.html

 

[oneshotkyle]

Me having already built a spartan glock mag upper lower from joe bobs in 9mm. The gun has been flawless and I decided to make a duplicate in 45acp. Only diffence is a 5.25 barrel and longer handgaurd. Just need to get out and shoot it. Joe bobs lowers are hard to beat