[cheney]

My bolt release rounded off already and it has only been used around 400 to 500 times. Poor Quality? I'm changing mags too often? Anyone care to weigh in on this? Ullie?
I'm not sending her back to Sig again, given I just got her back, but are there any machinists out there looking for a project? Maybe make one that lasts longer?
For now I'll run her like the AK and just rack it after a mag change, and I'm not too upset, just looking for solutions/opinions.
Thanks boys.

 

[cheney]

So no one has had this problem?

 

[ullie]

My bolt release rounded off already and it has only been used around 400 to 500 times. Poor Quality? I'm changing mags too often? Anyone care to weigh in on this? .

...you may have a slight case of tollerance stacking in which the already small area of the bolt catch engaging the bolt is further reduced by the bolt catch possibly sitting too low...or a combination of this and the bolt hitting a little too high......or the part may be flawed...ie too soft...even though the bolt catch is a part that eventually needs to be replaced on a PM schedual...it shouldn't start to round off this quickly...IMO...

...i suggested this to Sig Sauer in my letter...and also suggested using a better quality casting for the bolt catch...

5. Increase the top height of the bolt catch slightly to ensure capture of the BC group and increase the capture area somewhat to distribute the impacting loading over a greater surface area.

...i would recomend calling Sig...get a shipping label...and have them replace the bolt catch and verify that everything is in spec...including the rail's position in the upper...

 

[cheney]

I already requested a new one and it is a problem with the softness of the material. It worked perfectly fine until last night and I took it out to inspect it. Its rounded down to almost a 45 degree angle on top and the bolt is fine. We'll see how the new one does and what they say about it cause I'm sending the Bolt Catch back to them for inspection.
Thanks Ullie I appreciate it.

 

[cheney]

Figured out the problem. Excessive gap between the upper and lower allowed for the bolt to contact the bolt catch at a higher point and round off the tip of the catch. I sent the rifle to SIG a month ago and it happened once they tightened up the receiver. I'm chalking this one up to tolerances. Talked to one of the smiths at SIG and he agreed. So replacing it and if it develops again, they said to send it back. Thanks again Ullie.

 

[digger440]

Cheney, you are not the only one it has happened to. I took me a while to find this thread

http://sigarms556.com/viewtopic.php?t=7 ... t=sheriffs

I don't trust my wimpy "bolt hold open" as a "bolt release" but it also has to do with the way I shoot.

 

[cheney]

Now that you mention it digger I remember reading that one too. I think I may just leave it out as I'm happy with running it as an AK system. Simple and reliable, just a loss of that feeling you get when you are out of rounds. The click is pretty telling though too :lol:
TA33G-H will be here monday and my last exam is today. It will be amazing after noon. Hopefully I don't fail :?

 

[cheney]

Sig sent me out a new Bolt Catch and comparing the two pieces, the new one seems to be of much higher quality. Black phosphate coating is uniform and well applied, engagement surface is about 2mm higher than that of the old one, and the angle has been changed slightly. Also the material seems to have been properly heat treated and after 100 releases has shown no signs of wear unlike the old one. My rifle is a JS 20k series for reference.
So Ullie it does seem that they listened to you in your letter and I'm glad they did. Thanks again for all of your help Ullie and especially for contacting SIG and voicing your concerns.