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Mass compliant Ruger AR556 buffer tube.
- Thread starter Pyromancer
- Start date
it's not the length of the tube... its the diameter. You probably have a mil-spec stock and a commercial tube. Or perhaps the other way around.
EDIT:
On second thought, 9 inches does seem long. It sounds like you may have a rifle buffer tube instead of a carbine.
EDIT:
On second thought, 9 inches does seem long. It sounds like you may have a rifle buffer tube instead of a carbine.
Last edited:
ErnstStavro
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Did you buy the mil-spec or commercial version of the FCS?
it's not so much mass-issue as rather just the way ruger is building their rifles. presumably it's running a rifle buffer then as well? none of this rifle length tube/buffer is necessary for a 5.56 although in .308 i'm a fan.
you'll probably just want to swap over to a carbine tube, spring and buffer. if it's carbine length i usually prefer a heavier buffer like an H2.
you'll probably just want to swap over to a carbine tube, spring and buffer. if it's carbine length i usually prefer a heavier buffer like an H2.
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I think that guy is drilling a carbine tube to make the FCS stock longer? I'm running a rifle tube and was hoping to utilize the FCS to make my AR a little shorter.
If you're fine with the LOP with the Magpul stock on, you can do what he did otherwise if you want shorter you'll have to swap it out.
Castle nut not staked. Maybe someone swapped out the carbine buffer tube before selling the rifle. Also assuming it's not a 20"+ barrel.
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I bought this new from four seasons. It's a 16 inch rifle, which I assume usually get carbine buffer tubes? I was thinking maybe the MASS ones are different. Anyone else own a MASS AR 556?
Some “Mass compliant” AR’s use a certain buffer tube which is carbine length depth inside but have an extra couple solid inches at the end, making it longer. It’s not compatible with what you’re trying to do, or with any aftermarket stock that I know of. Take it off and toss it in the trash.
For the stock you purchased, you need a mil spec carbine tube.
For the stock you purchased, you need a mil spec carbine tube.
E.Stoner
NES Member
That's a long ass buffer tube, either a rifle length tube or ar-10/sr-25 tube.
My guess is it was cheaper for Ruger have a longer non-adjustable stock than a normal carbine tube with stops and a pinned adjustable stock.
Good news is that buffer tubes are cheap.
My guess is it was cheaper for Ruger have a longer non-adjustable stock than a normal carbine tube with stops and a pinned adjustable stock.
Good news is that buffer tubes are cheap.
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Here you go cheap and easy. Complete tube setup $20
Tiger Rock AR-15 6-Position MIL-SPEC Buffer Tube Kit ST007M
Tiger Rock AR-15 6-Position MIL-SPEC Buffer Tube Kit ST007M
That's a ****in weird receiver extension.
Can I ask, does that take a full length rifle buffer, like an A1/A2 style would?
I've honestly never seen one like it... Where'd you get it? Is it on a .308?
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Stock MASS Ruger AR556.
I replaced the tube with a normal length carbine buffer and accessories.
.556/.223
It must've shot very soft. I always trained on carbines but 5.56 and .300 with a rifle buffer has a really low felt recoil that I appreciate.
When you say "MASS" that means it was made specifically to be MA compliant before the Maura BS? What was on there before? Did it have multiple positions, or just one hole?
