blaese490 Posted October 29, 2014 Share Posted October 29, 2014 i have a Rock Island 3.5" 9mm BUG gun that i just started shooting to get ready for a back up gun match... with only 50ish rounds through it the barrel linkage broke.... anyone ever experience this and why would it happen? I'm hoping it was a fluke but any feedback is welcomed! Its Brand new out of the box Link to comment Share on other sites More sharing options...
Pat Miles Posted October 29, 2014 Share Posted October 29, 2014 The link was not fit correctly or a defective link. Link to comment Share on other sites More sharing options...
bountyhunter Posted October 29, 2014 Share Posted October 29, 2014 Link or barrel fit is not right so it stresses the link during cycling. Link to comment Share on other sites More sharing options...
Postal Bob Posted October 29, 2014 Share Posted October 29, 2014 Sounds like a defect. But what type of loads were you shooting through it? I know someone whose linkage broke in a open gun. But his loads were very hot, and the recoil spring too light. Link to comment Share on other sites More sharing options...
kcobean Posted October 29, 2014 Share Posted October 29, 2014 Are you seeing any polishing or rounding of the upper or lower barrel lugs that might indicate the barrel is unlocking too early or too late? Link to comment Share on other sites More sharing options...
NuJudge Posted November 2, 2014 Share Posted November 2, 2014 What does the fracture surface look like? You will probably need something stronger than a magnifying glass. Look for one of the following, or a mix of them: Fatigue failure will show marks like wave marks on a beach. This is the result of cyclical loadings well below what would cause plastic deformation. Fatigue is not supposed to happen in properly quenched and tempered steels loaded below something called the "Load Limit." Steel and Titanium are the only two common metals that show this quality. Brittle failure will be a low energy absorption fracture mode. The fracture surface looks crystalline. If brittle, I'd suspect the wrong alloy, or not tempered after quenching. Ductile fracture has a fibrous look to the fracture surface. Fracture surface is frequently a mix of two of these. The fact that it happened after just 50 shots says it probably is not fatigue. My experience in manufacturing was that the wrong material frequently gets into the supply chain, or heat treating gets done wrong, or doesn't happen at all. It would be hard to check whether the parts were fit right after the link broke. Link to comment Share on other sites More sharing options...
Blackhawk Posted December 1, 2014 Share Posted December 1, 2014 I'd think it would be a factory warranty item... Contact Rock Island... Link to comment Share on other sites More sharing options...
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