School me on bufferless upper assemblies

[EasyEJL]

I'm thinking about building an AR pistol using one of the Charon 3d printer lowers. But I don't know anything about the bufferless AR uppers.... so help me out those of you that do

[blue109]

I hate to say it, but that PS90 looking lower is pretty cool looking. cav arms should make something like that!

[EasyEJL]

yeah, that one isn't bad either. Just any 3d printer i'm likely to get will be too small to print it in one piece, so i'd have to do it in 2 and epoxy together.

[Robocop1051]

Easy. Most of those are usually made into .22lr builds using the Ceiner (or dare I say, CMMG) conversion kit.

I HIGHLY recommend the Taccom3G conversion. It's all NiB coated and has some modifications and upgrades built into it.

[AdamO]

What about using the Rock River LAR-PDS pistol upper?  Availiable in 5.56 and .300BLK looks like

 

http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_id=441

Edited March 11, 2015 by AdamO

[Robocop1051]

I just worry that those full size caliber uppers will wreck havoc on a printed lower. I know the poly lowers had a hard enough time as it was.

[shepp]

Aren't the Olympic arms pistol cal uppers buffer less or is that somthing different

Edited March 11, 2015 by shepp

[Robocop1051]

Aren't the Olympic arms pistol cal uppers buffer less or is that somthing different

They have buffers... but no gas tube system.

They are a blow back instead of DI or piston

[shepp]

They have buffers... but no gas tube system.

They are a blow back instead of DI or piston

Ok that was my confusion, I was thinking blow back was like the 22 insert

[AdamO]

I just worry that those full size caliber uppers will wreck havoc on a printed lower. I know the poly lowers had a hard enough time as it was.

Hmmmmm... valid point. Not sure how well that would do. I'd offer to mill one for him (to 80% of course) except I sold my CNC just 3 weeks ago. :(

Edited March 11, 2015 by AdamO

[Robocop1051]

Warning point being issued... why would anyone sell a CNC nowdays?

[EasyEJL]

yeah it would be nicer as an 80% aluminum for sure :)

[AdamO]

Aw man!! That's jacked up! LOL!

Ok well technically its still in my posession.. Guy I sold it to is out of town on work for a couple of weeks and hasn't picked it up yet. ;)

[planeflyer21]

Warning point being issued... why would anyone sell a CNC nowdays?

 

Give him another so it sinks in!  <laughs>   :hornet:

[FaRKle!]

There's the new Sig MCX upper... But you wouldn't be able to use the P90 style stock with it.

You could use the ARAK-21.

[98Z5V]

Olympic Arms pistol cal ARs have full BCGs, and use buffers and buffer springs in the buttstock.  They are blowback operated, and don't use gas systems.  They do have a very unique ejection system.  Ask me how I know.

 

The Olympic Arms OA-93 is a different animal altogether, and it's piston-driven.

 

[survivalshop]

Olympic Arms pistol cal ARs have full BCGs, and use buffers and buffer springs in the buttstock.  They are blowback operated, and don't use gas systems.  They do have a very unique ejection system.  Ask me how I know.

 

The Olympic Arms OA-93 is a different animal altogether, and it's piston-driven.

 

 

   

 

   Piston with return spring wrapped around it for returning the BCG back into Battery .

[MikedaddyH]

How about this one ??