Extractor Failure at 1100rds
Title says it all. Bought two ACBs for a 6.8 SPC upper with a Daniels Defense S2W 16" barrel, mid length gas. Ejection at 3, brass is immaculate, and no signs of pressure on the brass. At 1100 rounds I started suddenly getting failures to extract, on factory Hornady 110gr black and S&B 110gr FMJ. Took the bolt out and extractor off, sure enough the claw bent out wards and there are stress cracks on the bottom. Clearly it was slipping off the case rims, not shearing the rims like an over gassed carbine length gas port. Swapped in my spare bolt and gun is back up and running.
Now I couldn't find any other instances of this happening to LWRC bolts and these are popular bolts for AR builders on the 68forums, many of them pushing hot hand loads. Hoping this is just a bad run of parts.
Reviewed by: Addison H from Ohio on 9/17/2022