Is the piece you're talking about nylon or metal? Looking at the schmatic on the Numrich website, it seems to me that the buffer and buffer plate are switched numerically (26 and 27). (This is the piece I think you are talking about -
http://www.e-gunparts.com/DisplayAd....rSuperSKU=&MC= ). I have a copy of a detail strip on the HK4 and it states "removal of the nylon recoil buffer in front of the takedown latch is not recommended". That seems odd for an essentially perishable part. They are meant to be replaced over time. Then again, maybe they are just trying to say don't shoot it without the recoil buffer! If that has never been replaced, do it before trying to shoot it again. I can't imagine that this needs to be done by a gunsmith.
Last edited by jsbethel; January 23rd, 2009 at 06:49 PM. Reason: addition