New aluminum 11/9 OEM size upper

[Gaujo]

Just saw this on Reddit from a company called JC Arms. I have inquired about the dimensions, hoping they are SWD spec. I also inquired about getting the upper separate from the bolt and will update on both counts if I get a response. They say follow them on twitter for updates.

Some details I gathered

• The trunnion is 6061, the sheet metal is 5052.
• They are AC Tig welding the trunnion in

 

[skiboatsp]

5052 is awfully soft for a MAC bolt to be riding in type 3 anodized or not.

 

[skoda]

The bolt should largely be riding on the spring guide rod with a little help from the ejector rod but it can also rub against the receiver tube as well just not with a lot of force. It's probably fine but why not use steel? The weight savings isn't worth mentioning even if you were a parachuting commando going deep into enemy territory (with a MAC????). Probably just something to get buyers excited about being separated from their money. Maybe they will offer weird colors later which is easier with aluminum.

 

[rockman96]

An answer to a question never asked, imo.

 

[RevolverJockey]

Nothing like being a solution no one ever asked for trying to solve a problem no one never had.

 

[Slowmo]

I’m glad they are bringing new products to the market, but I don’t personally see the point. Hopefully they continue to innovate and make new MAC accessories even if that product doesn’t fly off the shelves.

 

[Gaujo]

Well they offered to send me one to evaluate and I will make a tabletop review of it. Stay tuned!

 

[rodfarva]

Whether needed or not, that's damn sexy

 

[skiboatsp]

Whether needed or not, that's damn sexy

Except for the bird*^(t welds.....And yes I can weld. It looks like MIG. Tig looks much better.

 

[Gaujo]

The bolt should largely be riding on the spring guide rod with a little help from the ejector rod but it can also rub against the receiver tube as well just not with a lot of force. It's probably fine but why not use steel? The weight savings isn't worth mentioning even if you were a parachuting commando going deep into enemy territory (with a MAC????). Probably just something to get buyers excited about being separated from their money. Maybe they will offer weird colors later which is easier with aluminum.

I thought about why. I think it is because there are a lot of new 3d printed Mac lower designs that are coming out that are designed to work with vmac uppers, and the vmac uppers are never in stock.

 

[pjm204]

I thought about why. I think it is because there are a lot of new 3d printed Mac lower designs that are coming out that are designed to work with vmac uppers, and the vmac uppers are never in stock.

Definitely why they're making them. They even show their upper in a 3d printed lower on the site.

 

[strobro32]

From what I've heard , VMAC uppers don't fit MAC, RPB and SWD lowers. If that's not true, someone needs verify..

 

[GWP]

Most 3d mac lower use ar15 parts
And are semi auto. And will take vac uppers
and take Glock mag, and the sten straight and curved .

 

[Galil#1]

All these little sexy ish mix & match possible SBR semi auto jobs... Poison Sumac that takes Suomi drums SBR'ed can be ultimate for a semi auto IMHO. Please show them if you got them, a complete rig... not all the little bits and pieces ha!

 

[GWP]

No sbr, just pistols the brace on the sten was removed.

 

[MitchWerbellsGhost87]

From what I've heard , VMAC uppers don't fit MAC, RPB and SWD lowers. If that's not true, someone needs verify..

I’m not sure, I do know that the VMAC-9 M11/9 clone has a slightly wider lower receiver so it’s possible that the uppers don’t fit a normal lower. I believe the M10 version is normal MAC/Cobray spec.

 

[Gaujo]

Most 3d mac lower use ar15 parts
And are semi auto. And will take vac uppers
and take Glock mag, and the sten straight and curved .

Which of the three do you like best GWP?

 

[GWP]

I am working on a new one now I am like it the best little smaller
Easy to print.

 

[GWP]

I would like to get a 22lr kit for a semiauto.

 

[GWP]