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View Full Version : Ruger SR556 on Full-Auto: Slow Motion Vids


Tokarev
05-04-11, 05:08
Here's a little something that goes hand in hand with my recent thread regarding my SR556C at the 5,000 round mark. Making these short videos is what helped put me at that mark.

The camera used is a little Panasonic FZ100. The camera doesn't get very good reviews on most photography boards but I've been happy with it. I'm especially pleased with the camera's video capabilities.

Anyway, here's what I've got. A Ruger SR556C upper on a Colt select fire lower.

http://www.youtube.com/watch?v=uV0Q0cujG2M&feature=channel_video_title

http://www.youtube.com/watch?v=WlX_abY3J4Y&feature=relmfu

http://www.youtube.com/watch?v=cjrG2MzPHdw&feature=relmfu
DasBulk
05-04-11, 05:27
Oh very nice.

Second video is my fav. :)
Duffy
05-04-11, 07:55
I like the ejection pattern, it's different from the DI AR, 10 to 15 inches to the right and a little forward, shooting to your right means I won't end up with a hot casing down my neck :laugh:
markm
05-04-11, 08:35
Wow! Not unique to Ruger... but the flat top upper flexes like a noodle. You can see the optic moving all over the place.

The upper looks to run smoothly. Cool Video!
BSWilson
05-04-11, 10:18
Wow, that's some really inconsistent ejection in video #2. It's all over the place.

Mark: That's what removing an integral carry handle will do for you. Now the question is does the increased flex contribute to increased parts failure or malfunctions in any tangible way...
hunt_ak
05-04-11, 10:41
Looked like the optic was moving more laterally than anything. Is this a problem?
markm
05-04-11, 11:04
Wow, that's some really inconsistent ejection in video #2. It's all over the place.

Mark: That's what removing an integral carry handle will do for you. Now the question is does the increased flex contribute to increased parts failure or malfunctions in any tangible way...

I've been dying to find out if running the CARRY HANDLE installed reduces receiver flex at all. :confused:
BSWilson
05-04-11, 11:09
I've been dying to find out if running the CARRY HANDLE installed reduces receiver flex at all. :confused:

My understanding from those who have tested such things is that the additional rigidity from an integral carry handle was significant, while a removable carry handle made little to no difference.
markm
05-04-11, 11:14
My understanding from those who have tested such things is that the additional rigidity from an integral carry handle was significant, while a removable carry handle made little to no difference.

Cool. Thanks.
Tokarev
05-10-11, 07:30
One of these days I need to get some footage of the Ruger on full-auto at normal speed just to give you guys an idea of the upper's cyclic rate.
markm
05-10-11, 08:13
One of these days I need to get some footage of the Ruger on full-auto at normal speed just to give you guys an idea of the upper's cyclic rate.

That would be cool of course... but the buffer system in the lower can make a big difference in cyclic rate. I can get my 14.5 middy to run about like a BAR with the A5 buffer.
RubberDucky
05-10-11, 20:54
Cool videos
Tokarev
05-10-11, 21:27
That would be cool of course... but the buffer system in the lower can make a big difference in cyclic rate. I can get my 14.5 middy to run about like a BAR with the A5 buffer.

True enough.

I don't know if anybody's really flogged a Ruger to see what combo works best on an F/A lower but I have had some timing issues with the gun on standard gas setting (#2) and a standard carbine buffer. No issues at all on the #2 setting with an H2 buffer. I need to try an H3 and see what that does to the cyclic rate. I also need to try some hotter ammo, like XM193, on setting #1 and see how that runs.
Tokarev
05-10-11, 21:28
Cool videos

Thanks. I think I had as much fun behind the camera as Nick did behind the trigger.
Tokarev
05-12-11, 18:15
Here's the new Ruger SR556E upper on the Colt lower with my full-auto bolt carrier in place.

This is with an H3 buffer and the gas setting on the wide open (#3) setting. We tried a few rounds on the #2 setting but couldn't get the bolt to lock back on an empty mag. The gun short strokes on setting #1 (lowest gas setting) with the H3 buffer in place.

As you can see, the cyclic rate is pretty high. I'm hoping an H2 buffer will allow the gun to work properly on setting #2 and help lower the cyclic rate.

http://www.youtube.com/watch?v=X0OhrvQuBy8
QuietShootr
05-12-11, 20:27
What camera are you using?

I'd like to try this with my 14.5" MRP.
Tokarev
05-13-11, 06:46
What camera are you using?

I'd like to try this with my 14.5" MRP.


More info on the camera:

http://panasonic.net/avc/lumix/compact/fz100/index.html
Tokarev
05-13-11, 06:46
I'll take both uppers out today (SR556C and SR556E) and see what I can do.
Tokarev
05-13-11, 11:35
Here's the SR556E upper with the H3 buffer in place. Gas setting is on #2. Note that the cyclic rate is more reasonable but the gun doesn't have enough oomph to lock the bolt open on an empty mag.

Partail mag on full-auto:
http://www.youtube.com/watch?v=yksVWX8eO58
Tokarev
05-13-11, 18:14
We ran the SR556E upper this morning with a standard weight and an H2 buffer in the lower. The gun runs fine on the lowest gas setting on semi- but would not run reliably on any gas setting with the light buffer in place. Next, we tried the gun with an H2 buffer and got good results.

Here's the gun on the lowest gas setting with the H2 buffer:
http://www.youtube.com/watch?v=_nz4SpF1yVE
Tokarev
05-13-11, 18:19
And another with the H2 buffer on the low gas setting. Jump ahead to about 22:00 or so.

http://www.youtube.com/user/824warrior#p/a/u/0/3JyTeX-fk4g
Tokarev
05-18-11, 19:03
Here's another video of a S&W VTAC upper on the same Colt F/A lower. H2 buffer in place.

http://www.youtube.com/watch?v=xehZx0Fake8
Sanpete
05-18-11, 21:44
Great videos. That rifle, range and shirt look familiar...
DirtDiver
05-24-11, 02:49
Fantastic videos. Makes me proud as a SR556 owner.
Tokarev
05-24-11, 06:55
One of these days I need to try the same stuff with my 6.8.
Tokarev
09-01-11, 18:52
Here's a quick 60 rounds using one of the new Surefire mags.

http://www.youtube.com/watch?v=c9qUOFj17qw&feature=mfu_in_order&list=UL
BufordTJustice
09-02-11, 01:42
You also may want to try a std power CS buffer spring from Brownells or Springco (their 'white' spring).

The inconsistent ejection angles are due to inconsistencies in the rearward speed of the BCG.

Andrew @ Vuurwapen Blog did some recent tests showing that the CS buffer springs seemed to keep the range of BCG velocities in a MUCH tighter window. The brownells spring is under $5 and was tested favorably. This should make your ejection more consistent and give you a better idea of how close you are to a buffer that is too heavy to lock back on empty.

Maybe even try a springco Blue w/ an H buffer? Either way, great videos. I really love what the slow-motion reveals about the AR platform. :D