The anti-tilt pads are a integral part of the bolt carrier ( they have nothing to do with the buffer, I use a standard H buffer in my Piston system) they are machined into the carrier during manufacture, the same as the solid carrier key, its also machined into the carrier during manufacture, NO bolt on carrier key!
Find a picture of the HK 416 bolt carrier and you will see the pads on the lower rear of their carrier...........................AD
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