HKPRO Forums banner
1 - 16 of 16 Posts

·
Registered
Joined
·
6 Posts
Discussion Starter · #1 ·
I read the old threads on this and couldn't get a clear answer.

I live in a ban state and need to use a fixed stock, most of which use rifle-length tubes. I'd like to use a rifle-length stock anyway for the length of pull.

As we know, the MR556A1 upper comes with its own HK spring and buffer that HK says must be used. Here are solutions I've seen mentioned:

1. Use a rifle-length tube, rifle buffer, and a Wolff XP spring. This is what seems to get recommended a lot in the past threads.
2. Use a rifle-length tube, rifle buffer, and rifle spring.
3. Use a spacer that sits at the end of the tube, behind the spring, to bring the rifle tube length down to carbine length. Spikes sells one.

#3 seems like the best option to me since I can use the HK buffer and spring I already have, but it's also not been talked about much, other than someone saying it's dangerous because the spacer doesn't allow venting (??) .. no idea but that sounded like FUD to me.

Thoughts?
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #3 ·

·
Registered
Joined
·
2,552 Posts
The length of pull is too short for me.
An A1 fixed stock has a LOP of 12.875";
The MOE I listed is advertised as 12.4" (and I'm sure you saw this) it will accomodate the .8" PRS thick recoil pad so it can be every bit as long as an A1

If you can't work with an A1 length stock, you must be a monster or you're not doin' some thing right.
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #5 ·
An A1 fixed stock has a LOP of 12.875";
The MOE I listed is advertised as 12.4" (and I'm sure you saw this) it will accomodate the .8" PRS thick recoil pad so it can be every bit as long as an A1

If you can't work with an A1 length stock, you must be a monster or you're not doin' some thing right.
I guess I'm a monster then. With or without a recoil pad, that fixed MOE is going to be shorter than an A2 or a fully-extended M4, at about 13.5". I appreciate the suggestions, but let's keep the thread about using a rifle tube with an MR556A1 upper.
 

·
Premium Member
Joined
·
4,004 Posts
I think his point was that a rifle length tube will likely have a negative impact on reliability. The system was designed and tested around the OEM tube/spring/and buffer combination
 

·
Registered
Joined
·
49 Posts
OP - can't you find a Magpul stock to fit the MR and just pin it? I used live on a ban state and most gunsmiths can pin almost any stock. The stock HK one is tough but can be done. There's just not much real estate on it to get a pin in there.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #8 ·
OP - can't you find a Magpul stock to fit the MR and just pin it? I used live on a ban state and most gunsmiths can pin almost any stock. The stock HK one is tough but can be done. There's just not much real estate on it to get a pin in there.
I thought about it and still might but I'd also like to know what my options are for using a rifle tube since that opens up a lot more possibilities.
 

·
Registered
Joined
·
700 Posts
I guess I'm a monster then. With or without a recoil pad, that fixed MOE is going to be shorter than an A2 or a fully-extended M4, at about 13.5". I appreciate the suggestions, but let's keep the thread about using a rifle tube with an MR556A1 upper.
I am just not sure, I am 6'8 and do not need to extend fully. I would consider your shooting position as the #1 thing I would look at if you came into a course of mine and suggested that an MR223/556 stock does not have enough pull for you.
While this may not directly answer your question, I would be inclined to bet money on a different shooting position solving your problem.
 

·
Banned
Joined
·
2,002 Posts
I thought about it and still might but I'd also like to know what my options are for using a rifle tube since that opens up a lot more possibilities.
The VLTOR A5 system is the longest I know of that works well with the MR556/HK 416 uppers very well. 7 positions and 12.5" LOP IIRC
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #11 ·
The VLTOR A5 system is the longest I know of that works well with the MR556/HK 416 uppers very well. 7 positions and 12.5" LOP IIRC
I've heard good things. Unfortunately, I'm looking at fixed stock options because of my state laws.

I am just not sure, I am 6'8 and do not need to extend fully. I would consider your shooting position as the #1 thing I would look at if you came into a course of mine and suggested that an MR223/556 stock does not have enough pull for you.
While this may not directly answer your question, I would be inclined to bet money on a different shooting position solving your problem.
I don't know what the HK stock goes out to, but with a carbine stock, fully extended is about right for me. Another half-inch would be nice.
 

·
Registered
Joined
·
2,552 Posts
I've heard good things. Unfortunately, I'm looking at fixed stock options because of my state laws.
We know...obviously, you would have to pin that one too :p

The LOP of an A5 on the 7th position is at least as long as or longer than an A2 stock. With the right stock on an A5, you can get out 14+" LOP. I know this doesn't matter because you insist on a rifle buffer tube.



PS, can someone confirm this guy doesn't have an IP address out of Ballwin, MO :26:
 

·
Premium Member
Joined
·
694 Posts
The length of pull is too short for me.



It's technically collapsible, so no good for a featureless ban state build, but regardless, the exact question in my OP still applies since it uses a rifle-length tube.
How do you hold the rifle when you shoot? I generally shoot nose to charging handle and shoot with my stocks fully collapsed or on the second notch.
 

·
Registered
Joined
·
6 Posts
Discussion Starter · #14 ·
I don't insist on using a rifle tube, but I was trying to keep this thread about that (before I gave up). Because then future people searching about using a rifle tube won't have to read 9 pages about my body type, LoP preferences, and favorite carbine stocks.

How about we pretend that I asked about using a family heirloom A2 stock instead, as a thought experiment? If the experts' wisdom is that using a rifle tube (with any combination of springs, buffers, and spacers) will make my rifle explode instantly, that's fine too; that's the discussion I was hoping to have.
 

·
Registered
Joined
·
350 Posts
I ran a Magpul MOE rifle stock with a spacer and HK buffer and spring with no issues both suppressed and non-suppressed. If you need a fixed stock solution that's the direction I would go in.
 
1 - 16 of 16 Posts
Top