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View Full Version : need opinions on J D Machine AR lowers


g_conway
12-10-2011, 5:05 PM
lookin for a lower for a 5.56 lower.
A number of people have mentioned J D Machine.

Any opinions?

Also, what makes a lower 5.56 or 7.62 vs. MULTI-CAL?

h0use
12-10-2011, 5:08 PM
It's a great lower and it's from san Diego. Also check out aero precision.

Seeker
12-10-2011, 5:44 PM
I think that by stamping it MULTI-CAL they mean that it can shoot 5.56mm and .223.

AeroEngi
12-10-2011, 5:49 PM
They're good to go. I have one on my AR and it's flawless.

Sent from my DROID RAZR using Tapatalk

Reductio
12-10-2011, 5:50 PM
A lower is a lower is a lower. Get either whatever's cheapest, or what you like. JD is a California company, I would buy from them for sure.

Seeker... are you serious? The lower has NOTHING to do with 5.56 v .223, that's all in the chambering in the upper. What makes the difference in an AR-15 lower between 5.56 and multi-cal is just whatever the manufacturer wants to engrave on there. I have a couple lowers with no markings at all.

Tacticool
12-10-2011, 5:54 PM
I have both the lower and upper receivers made by JD and there is not play whatsoever. They were made for each other.;)

MrPlink
12-10-2011, 5:56 PM
A lower is a lower is a lower. Get either whatever's cheapest, or what you like. JD is a California company, I would buy from them for sure.



exactly

things only change when you start looking at billet or plastic ones like Plum Crazy.

Outside of that, pick whatever you want!

JoeGSX
12-10-2011, 6:05 PM
Have to agree with everone here. I have a couple JD lower and uppers in .556, 6.8 and soon to be 6.5 grendal. I have built several for friends as well with no play. No play at all. They are a great company to deal with.

GUNNTZ
12-10-2011, 6:26 PM
I've got a few of them, no issues at all and fit is good with several different brand of uppers. I would get one if the price is good.

Evolipse35
12-10-2011, 6:27 PM
If you can wait for a gun show, mostly in So-Cal area, JD has a booth and its usually $99 and they do their own DROS. Reason why i say this is that they have many lowers you can choose from that they make. Different designs, and even color filled, and yes they do make the branded "CALGUN" OLL lower. One is coming up in Del-Mar 17th-18th weekend. :mnl:

DF666
12-10-2011, 6:50 PM
I have to agree with everyone on here...JDs are GREAT! I done two builds with them and
haven't had a problem...their uppers are great too...

Colt-45
12-10-2011, 6:53 PM
I've got 1 JD lower. Functions and looks just like all the other ones. The only thing I've noticed is the metal seems a bit flexible?:confused: I wouldn't consider that a plus nor a minus though.......

HPGunner
12-10-2011, 7:05 PM
Just picked up one today. I look for the quality of the finish and machining and also price. I like to keep it under $100 or so.

eaglemike
12-10-2011, 7:10 PM
The .223/5.56 family are one size of lower, the 7.62 is much larger.

The labeling (.223/5.56/6.8/.22lr, etc) really means nothing. It would be recorded on the DROS. It doesn't limit you as far as what caliber upper you fit. There's been from .22rimfire to various families of .50 caliber used on the smaller lower. This is possible because a lot of them are bolt action, most of these single shot. The lower is just used as a firing platform.

ironhiide
12-10-2011, 7:18 PM
I have both the lower and upper receivers made by JD and there is not play whatsoever. They were made for each other.;)

+1

My set which which were not purchased together or even from the same reseller sit perfectly flush without play.

Noonanda
12-10-2011, 7:50 PM
I like em, got one of their Calguns lowers when they were still Kaiser Defense, great piece of gear and went togther easy.

They had a booth at the Yucca Valley Gun show today, was chatting with the guy for about 10 minutes

Javi
12-10-2011, 8:09 PM
If you can wait for a gun show, mostly in So-Cal area, JD has a booth and its usually $99 and they do their own DROS. Reason why i say this is that they have many lowers you can choose from that they make. Different designs, and even color filled, and yes they do make the branded "CALGUN" OLL lower. One is coming up in Del-Mar 17th-18th weekend. :mnl:

Do they go to a few Crossroads shows? I dont remember if I saw them at the Ontario show. I'd love to do that! Especially with a lot of options like that.

JoeGSX
12-10-2011, 8:27 PM
Doesnt JD make Noveske lowers?

vintagearms
12-10-2011, 8:45 PM
A lower is a lower is a lower. Get either whatever's cheapest, or what you like. JD is a California company, I would buy from them for sure.



Not quite correct, but for semi use thats close. Some have a bit more milling to allow for NFA registered auto sears or lightning links. Others like them slab sided for A1 look-a-likes, and others prefer the fit/finish of billet lowers.

I do own a JD lower and like them.

Panchira!
12-10-2011, 8:59 PM
I have a lower and upper they are awesome! Fit and finish are great

Colt-45
12-10-2011, 9:02 PM
Doesnt JD make Noveske lowers?

I've heard stories proving and disproving that. I'd like to know the truth as well.

It could have quite possibly been a short run or something. I've also heard that CMT makes the Noveske lowers.

Evolipse35
12-10-2011, 9:27 PM
Do they go to a few Crossroads shows? I dont remember if I saw them at the Ontario show. I'd love to do that! Especially with a lot of options like that.

I don't know about the Ontario, they were there for the Costa Mesa, Glendale, and Del-Mar shows. Yah they are the one who manufactures Noveskes and Spikes. And they also make the Centurion Arms rail handguards.

1904
12-10-2011, 9:31 PM
Get a Calguns lower made by JD!

Javi
12-10-2011, 9:35 PM
I don't know about the Ontario, they were there for the Costa Mesa, Glendale, and Del-Mar shows. Yah they are the one who manufactures Noveskes and Spikes. And they also make the Centurion Arms rail handguards.

Oh, okay. I thought about it after posting and since they're from SD, I'd have to travel 2 hours to pick up a $99 lower found at Rifle Gear haha. Would be neat to see the different options offered by JD themselves, though.

VCMike
12-11-2011, 9:03 AM
JD is great company. I went by there shop on a Saturday morning, they gave us a tour and were really helpful. I think their lowers and uppers are finished better than some of the others I have seen.

Seeker
12-11-2011, 6:02 PM
A lower is a lower is a lower. Get either whatever's cheapest, or what you like. JD is a California company, I would buy from them for sure.

Seeker... are you serious? The lower has NOTHING to do with 5.56 v .223, that's all in the chambering in the upper. What makes the difference in an AR-15 lower between 5.56 and multi-cal is just whatever the manufacturer wants to engrave on there. I have a couple lowers with no markings at all.

Whether the manufacturer wants to stamp 5.56 or Multi-cal is irrelevant since they both will shoot the 5.56 and 223 rounds. :p

Baxter
12-11-2011, 6:20 PM
If you are local to San Diego just go down there and ask for the "gun show special". Last time they were $89 at the shop.

g_conway
12-11-2011, 6:27 PM
Thanks all for the info and great comments on the products.
Now I just have to decide which "design" to purchase.

fabguy
12-11-2011, 6:43 PM
Whether the manufacturer wants to stamp 5.56 or Multi-cal is irrelevant since they both will shoot the 5.56 and 223 rounds. :p

lol... yes and several other rounds like the 7.62x39mm, the 6.8 spc, .50 beowolf, 6.5 grendel etc, etc, etc,

Reductio, is correct

32blownhemi
12-11-2011, 8:29 PM
7.62 x 51 is the same as a .308 & is a AR-10 lower. I got a JD AR-10 lower at the Ventura gun show awhile back. Special ordered it & they sent it to my FFL in Ventura. It's BEAUTIFUL! Like mentioned they have different color options available. I got the one where the JD Machine logo is large & covers the lower & upper with color fill. You can also get the JD Machine logo smaller & just on the lower. Now you can fire a 7.62 x 51 round in a .308 upper but not the other way around. The .308's are hotter, just like the 5.56 rounds are hotter than 2.23's... I'll try to attach a pic... Bill

Javi
12-11-2011, 8:44 PM
Wow, I've never seen that HUGE JD logo on the upper/lower. That turned out really cool!