OMFG!!! YES YES YES OrGASIMS all around!

[Seedy]

Didn't know that... do you need to get an HK hammer or something?

[studdermonkey]

I really wanted to get one of these for a while. In my dreams at least. But the more I read in to it and the more I hear, Vince has it dead on. Not only does it NOT exist for someone like me or almost anyone else here, you can also just get one of many other piston uppers and solve the problem that way.. and have a proper height rail to fit any irons, fit any mags with a regular lower of your choice and at 1/5 the price. They look cool. They work well I bet, but so do all the other piston lowers at 1/5 the price. I'd be willing to pay more to have an HK AR type rifle, but not that much more. I'd also bet you'd get much better customer service from Adam Arms or LMT. Not sure about LWRC, but they're a cheaper solution .

[Seedy]

The MR762 would be an excellent .308 platform and to me would be more desirable than a FAL, HK91, AR-10 etc. (but maybe not an M1A with an MCS stock that I'm gonna build   ) but I'm definitely not sold on the MR556. Too much for too little.

[Fat_Santa54]

^ Agreed, If they were both sitting on the shelf I would probablly get the 7.62 version,

And Why isnt a standered AR-15 lower compatibable with the upper?

[azsarge]

You need a full auto hammer because of the way it interacts with the 416 firing pin.

I didn't know that until a guy tried to put his "work" 416 upper on a DPMS lower in our shop and it wouldn't fire.  

I'm not sure why that was the case, but I don't argue with "Weapons Sergeants" about weapons.

[Seedy]

You need a full auto hammer because of the way it interacts with the 416 firing pin.

I didn't know that until a guy tried to put his "work" 416 upper on a DPMS lower in our shop and it wouldn't fire.  

I'm not sure why that was the case, but I don't argue with "Weapons Sergeants" about weapons.

Can you drop a standard AR-15 BCG into a HK416 upper and make it work with an AR-15 lower or would that not work either because of the gas piston system?
I always assumed the gas piston guns were different from just the delta ring forward. Guess I got this assumption from the drop-in kits you can buy like the Bushy one.

[Vince]

You need a full auto hammer because of the way it interacts with the 416 firing pin.

I didn't know that until a guy tried to put his "work" 416 upper on a DPMS lower in our shop and it wouldn't fire.  

I'm not sure why that was the case, but I don't argue with "Weapons Sergeants" about weapons.

Can you drop a standard AR-15 BCG into a HK416 upper and make it work with an AR-15 lower or would that not work either because of the gas piston system?
I always assumed the gas piston guns were different from just the delta ring forward. Guess I got this assumption from the drop-in kits you can buy like the Bushy one.

It has a special BCG. You also need a tungsten buffer and a real strong buffer spring.

[Seedy]

wow thats nuts.

[azsarge]

Unlike direct impingement AR operating systems, not many gas piston systems are compatible with that of other manufacturers.  

I think there are certain conditions with which a short-stroke, self-regulating gas piston system will lengthen mean time between weapon malfunctions.  With regard to the units that currently employ such systems, I'm sure they have identified such conditions and have utilized the piston uppers in that role only.  Everyone that has bought piston uppers out of pocket has either bought one because they shoot under those conditions (short barrel, full auto, suppressed) or because they admire the technical advantages of such a system.

In all honesty, I don't see it as the wave of the future, but it DOES have a niche.

But this is all coming from a guy who works with guns that vent ALL the gas out the barrel, so what would I know? :mrgreen:

[Fat_Santa54]

But I think the main reason I want the system is the way it looks, not going to lie the gas-piston system is nice, but worthless for someone like me who is just firing at ranges and in the desert sometimes, If something goes wrong its not like ive got people shooting at me. That being said, thats why i wouldnt spend the $5-6000 people want for these, but I had no idea that it wasnt compatable with a normal ar-15 lower, So just for kicks and giggels how much work would be needed to make the 416 upper work with an ar-15 lower?

[Seedy]

They already said what it needs...
Bunch of HK parts including a full-auto hammer that aren't going to be very easy or cheap to find.

[Ranger_Robby]

But I think the main reason I want the system is the way it looks, not going to lie the gas-piston system is nice, but worthless for someone like me who is just firing at ranges and in the desert sometimes, If something goes wrong its not like ive got people shooting at me. That being said, thats why i wouldnt spend the $5-6000 people want for these, but I had no idea that it wasnt compatable with a normal ar-15 lower, So just for kicks and giggels how much work would be needed to make the 416 upper work with an ar-15 lower?

The price for the uppers should come down later this year when the MR556 is released. Unfortunately I found that as of right now the receiver pin has infact been moved on the american model as well, HK still wanting the uppers to only be used on thier guns. I cant imagine the guns being more then 2K-3K, but you never know, especially when they first come out. I'm (wishfully) thinking (err..hoping) it will be priced around the LWRC M6A2's price of 2200. But it looks like it's now coming to America late this year.
http://www.hkpro.com/documents/HK-MR-RIFLES-011409.pdf

As for finding out what you need to make an HK416 upper work with a semi auto lower, you are better off going to HKPRO and asking. there are plenty of people there that have done it. below is the link to the 416/417 thread.
http://hkpro.com/forum/forumdisplay.php?f=118

[IconarmsDealer]

SLow down guys..
The HK is great, the price is a Joke!

Want the same thing?, or darn close?
 LMT Gas Piston  rifle  w sopmod, 16"  $1950.00
Or a conversion for your upper-$672.00
LMY make  about the best Ar.M16 systems going

 For the record: You may Not install ANY MI6 Fire control componenets in to your AR 15, To include, but not limited to Hammer, Trigger selector, Disconnector, bolt carrier. regardles of weather it will only function in semi..... Thats the law.
 In fact if you have an Ar15 and all the parts from an M16 in your possession this can be viewed as  vilolation of the NFA....so be careful.

[azsarge]

SLow down guys..
The HK is great, the price is a Joke!

If you mean the HK416, the guys I know that have one paid $0.00 out of pocket.

Want the same thing?, or darn close?
 LMT Gas Piston  rifle  w sopmod, 16"  $1950.00
Or a conversion for your upper-$672.00
LMY make  about the best Ar.M16 systems going

If you mean "LMT," I agree, but I would not limit the list of top quality ARs to just one manufacturer.  

 

For the record: You may Not install ANY MI6 Fire control componenets in to your AR 15, To include, but not limited to Hammer, Trigger selector, Disconnector, bolt carrier. regardles of weather it will only function in semi..... Thats the law.
 In fact if you have an Ar15 and all the parts from an M16 in your possession this can be viewed as  vilolation of the NFA....so be careful.

I don't think that is the case, sir.

[Fat_Santa54]

So most of the people on say the HKPRO fourms that have their AR-15s with the 416 upper are commiting a crime?

I thought as long as the peice doesnt enable full-auto it is still legal(I could be completly wrong too)