what is moving back and forth inside my buffer tube?

colostomyclown

New member
just noticed it inside both rock river lowers I own. Is it just the buffer itself and the spring? I feel something shift up to down as the gun is rotated end over end....sorry if a silly question, but I'm learning...
 
If you take the buffer out of the spring and tube and rock it back in forth, you will feel a moving weight inside.

Gregg
 
It's the buffer that you hear probably. The buffer has weights inside of them that SHIFT. The shift is intentionally, for absorbing the recoil. There are some buffers like the Spike's Tactical ST-T2 that uses tungsten, just like the traditional ones, but it's in Powder form. It still shifts, but you do hear it as you tilt the gun back and forth. Some are even hydraulic. But the majority have 1-3 tungsten weights inside of them that shift.
 
it was the buffer. Now I know how to remove it. Might soun d silly, but I'm learning. Does the buffer need to be positioned a certain way once it's reinstalled and retained inside the tube?
 
Yes. You need to be facing magnetic north and have a shot of Irish whiskey in your mouth when you put the buffer back into the tube.


No. Just put the spring around the buffer and slide them both into the buffer tube till the retaining pin pops up to hold the buffer.

Pick the answer you like best.:D
 
Now that you figured out what the buffer is you can start having some fun with buffer weights. There is a standard carbine weight buffer and then there are heavier buffers that are supposed to reduce and smooth out the felt recoil and slow the cycling of the bolt. The heavier buffers are designated H, H2 and H3, with each being progressively heavier. The Spikes buffer mentioned by Christcorp uses powdered tungsten rather than metal weights. It weighs in between the H and H2 buffers, but gets rid of the rattling sound that buffers with weights can make.

I installed a Spikes buffer today and shot my S&W M&P15 Sport. The difference in felt recoil was somewhat noticeable, but did not seem that great. However, at the end of my range session my shoulder wasn't sore at all. With the standard buffer I would get some soreness in my shoulder after 50 or so rounds, so I guess the heavier buffers do make a difference.
 
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