The main problem I had with this LRBHO was aligning the bolt carrier catch tip with the bolt carrier. I ended up offsetting the rear portion of the LRBHO with a 4mm brass shim made from a 22lr casing and flexing the bolt carrier catch tip medially. It's a fairly complicated modification with all of the linkage required so, you are going to have to massage it a bit. I definately had to, but it works 100% now.
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