survivalshop Posted June 14, 2010 Report Share Posted June 14, 2010 On the recent test fire of my AR 308 ,the Bolt Catch failed to catch the bolt after last round . This occurred with three differant manufacturer's mags.After making sure there were no burrs on any of the parts & no interference with the mechanics of the BC. This included making sure the spring would have proper travel.I stoned a few thou. off the stop for the BC. lever to let it pivot a little more . After checking how far the mag follower pushed up the BC. up ,I stoned until I got the Catch to stay engaged with or with out an empty mag in place .The measurements of what I came up with my help others ,if this problem comes up . The thickness of the end of the catch that rests against the lower receiver , that I have is 0.209" ,this measurement doesn't mean much because there could be variations from part to part . The one I got to get the Catch to catch the bolt & keep it there might help. 0.414 ,Is the height the top of the Catch is from the flat of the Receiver below it . In other words how high it sticks up to catch the bolt ,but not to high to interfear in some way.I will post some photo's in the morning .[img width=810 height=607]http://i394.photobucket.com/albums/pp30/oldpanhead58/LH1483.jpg[img width=810 height=607]http://i394.photobucket.com/albums/pp30/oldpanhead58/LH1481.jpg[img width=810 height=607]http://i394.photobucket.com/albums/pp30/oldpanhead58/LH1485.jpg Quote Link to comment Share on other sites More sharing options...
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