Hey everybody.
I recently bought a Sig 516 patrol rifle in FDE. It is a beautiful rifle but it has not been performing up to par. I have been having FTE, FTF, Double feeds, jamming, and bolt not locking open on last rounds. About 50-60% of the time. I have experienced this mostly with .223 caliber rounds but also a few times with .556 also, & different types of magazines as well. I tried switching the gas setting to adverse but it didnt change it enough to make a difference. I cleaned the rifle before I shot it after I bought it just to be clear there. I have done some reading and narrowed it down to either the rifle hasn't been "broken in" or its a manufacturer defect until today where I stumbled upon a post in a blog discussing the buffer springs installed on the Sig 516 rifles. The guy was stating that the buffer springs they installed were super tight and over powered by 1 -3 lbs, making the bolt not cycle properly when running .223 rounds causing the problems I described. In theory once the buffer spring gets broken in the rifle runs fine. He stated that he had two Sig 516 rifles himself and had done a modification to the buffer spring that fixed the problems in both of his rifles. He said he cut 1/2 -1 & 1/2 " of the bottom of his buffer spring and it allowed the rifle to cycle properly and allowed the bolt to lock open every time using .223 rounds. In turn you would need another buffer spring to run .556 rounds seeming kind of silly but would be something I would do to be able to run it properly. I decided to just store it with the bolt locked open for a few days and see if that loosens the buffer spring up any. I also ran across a underpowered buffer spring by WOLFF that states is made for cycle function of .223 in AR platform rifles.
My questions are: Does anyone own a Sig 516 that has had these problems? If so can you give me any feedback as far as cause or solution? Has anyone heard or tried the spring. You WOLFF?
Any help would be much appreciated.
Thanks guys.
I recently bought a Sig 516 patrol rifle in FDE. It is a beautiful rifle but it has not been performing up to par. I have been having FTE, FTF, Double feeds, jamming, and bolt not locking open on last rounds. About 50-60% of the time. I have experienced this mostly with .223 caliber rounds but also a few times with .556 also, & different types of magazines as well. I tried switching the gas setting to adverse but it didnt change it enough to make a difference. I cleaned the rifle before I shot it after I bought it just to be clear there. I have done some reading and narrowed it down to either the rifle hasn't been "broken in" or its a manufacturer defect until today where I stumbled upon a post in a blog discussing the buffer springs installed on the Sig 516 rifles. The guy was stating that the buffer springs they installed were super tight and over powered by 1 -3 lbs, making the bolt not cycle properly when running .223 rounds causing the problems I described. In theory once the buffer spring gets broken in the rifle runs fine. He stated that he had two Sig 516 rifles himself and had done a modification to the buffer spring that fixed the problems in both of his rifles. He said he cut 1/2 -1 & 1/2 " of the bottom of his buffer spring and it allowed the rifle to cycle properly and allowed the bolt to lock open every time using .223 rounds. In turn you would need another buffer spring to run .556 rounds seeming kind of silly but would be something I would do to be able to run it properly. I decided to just store it with the bolt locked open for a few days and see if that loosens the buffer spring up any. I also ran across a underpowered buffer spring by WOLFF that states is made for cycle function of .223 in AR platform rifles.
My questions are: Does anyone own a Sig 516 that has had these problems? If so can you give me any feedback as far as cause or solution? Has anyone heard or tried the spring. You WOLFF?
Any help would be much appreciated.
Thanks guys.