after ALL other options have failed to stop FTE on this gen3 g36 I came upon this. The "ORIGINAL" SLBwas vastly different than the one offered today as OEM by glock. Put the side by side and its obvious. The " older" NON-LCI SLB is available as the 10/45 olive drab SLB form glock stores- ive ordered and will install with the new NON-LCI EXTRACTOR this may just do the trick