Sig P516 - Cycle Issue - Page 1

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[ARCHIVED THREAD] - Sig P516 - Cycle Issue

Posted: 12/19/2014 6:52:21 PM EDT

Greetings,

I debated posting this in the pistol section, but feel I would get better traffic / diagnosis here.

Specifics:

Issue - After about 5 rounds of a full mag, the bolt will fully cycle, reset hammer and trigger, but does not cycle a new round into the magazine.

Any thoughts or things I should consider? Going to try Gas position 2 adverse next.

Thanks!

Posted: 12/19/2014 9:44:10 PM EDT

[#1]

Make sure the gas valve setting is set @ the 12 o'clock position and not the suppressor position. What weight buffer are you using?

Quoted:
Greetings,

I debated posting this in the pistol section, but feel I would get better traffic / diagnosis here.

Specifics:

Issue - After about 5 rounds of a full mag, the bolt will fully cycle, reset hammer and trigger, but does not cycle a new round into the magazine.

Any thoughts or things I should consider? Going to try Gas position 2 adverse next.

Thanks!

View Quote

Posted: 12/19/2014 10:03:05 PM EDT

[#2]

Thank you for the response. H2 Buffer (factory) and Gas Setting was in position 1 (12 o'clock)
It seemed to cycle the bolt ok, just didn't pick up a new round from the magazine.

Posted: 12/19/2014 10:49:53 PM EDT

[#3]

Quote History

Quoted:
Thank you for the response. H2 Buffer (factory) and Gas Setting was in position 1 (12 o'clock)
It seemed to cycle the bolt ok, just didn't pick up a new round from the magazine.

View Quote

Will the bolt lock back after shooting the last round? Try loading one round at a time to see if it consistently locks back on an empty mag. I'm wondering if the bolt carrier is coming back far enough. You shouldn't need to go to the adverse gas setting. Although an H2 weight buffer should be perfectly fine (I use an H3 with heavy buffer spring), you could also try a lighter H buffer.

Posted: 12/19/2014 10:51:46 PM EDT

[#4]

Quote History

Quoted:

Will the bolt lock back after shooting the last round? Try loading one round at a time to see if it consistently locks back on an empty mag. I'm wondering if the bolt carrier is coming back far enough. You shouldn't need to go to the adverse gas setting. Although an H2 weight buffer should be perfectly fine (I use an H3 with heavy buffer spring), you could also try a lighter H buffer.

View Quote View All Quotes

View All Quotes

Quote History

Quoted:

Quoted:
Thank you for the response. H2 Buffer (factory) and Gas Setting was in position 1 (12 o'clock)
It seemed to cycle the bolt ok, just didn't pick up a new round from the magazine.

Will the bolt lock back after shooting the last round? Try loading one round at a time to see if it consistently locks back on an empty mag. I'm wondering if the bolt carrier is coming back far enough. You shouldn't need to go to the adverse gas setting. Although an H2 weight buffer should be perfectly fine (I use an H3 with heavy buffer spring), you could also try a lighter H buffer.

Thanks, the bolt does lock back on an empty magazine.

Posted: 12/20/2014 11:52:55 AM EDT

[#5]

How many rounds total through the upper.

My sons 516 was a little tight for the first few mags, after 200 rounds , we cleaned the piston system, and have had 2000 flawless rounds since.

Posted: 12/21/2014 4:13:47 PM EDT

[#6]

Hi Folks - I removed the Law Tactical Side folder and the issue appears to be gone. Thanks

Posted: 12/21/2014 11:08:36 PM EDT

[#7]

Quote History

Quoted:
Hi Folks - I removed the Law Tactical Side folder and the issue appears to be gone. Thanks

View Quote

Well crap. You never said you had THAT installed.

Posted: 12/22/2014 5:15:12 PM EDT

[#8]

Sorry about that. I've not read or heard of any issues like that with a side folder on, so I ruled it out. I couldn't recall if it occurred before I installed it or not. I actually though the issue predated it.

Posted: 12/22/2014 8:01:45 PM EDT

[#9]

Quote History

Quoted:
Sorry about that. I've not read or heard of any issues like that with a side folder on, so I ruled it out. I couldn't recall if it occurred before I installed it or not. I actually though the issue predated it.

View Quote

Shoot a few hundred rounds (trouble free) and then reinstall the side folder and see what happens.