Michael303 Posted March 12, 2021 Share Posted March 12, 2021 Is anyone familiar with the specs and milling the Lissner ramp cut into a frame? Most of it looks pretty straight forward but I'm particularly interested in how the radius is done. Maybe my Google-fu is lacking but I haven't found much info or even pictures. Any feedback is appreciated. Link to comment Share on other sites More sharing options...
MikeBurgess Posted March 12, 2021 Share Posted March 12, 2021 I believe you mill as for Clark Para and relive the top edge with a Dremel to clear the radius, the radius is not a impact surface its just there to not be a stress riser. Link to comment Share on other sites More sharing options...
Michael303 Posted March 13, 2021 Author Share Posted March 13, 2021 Thanks for the feedback. Doing the radius by hand seems inelegant compared to milling but I can't think of any other way that wouldn't require a cnc or wider cut to mill the radius. It makes sense that the radius isn't a contact surface but are the horizontal and vertical surfaces adjacent to it contact/impact surfaces or is there supposed to be some clearance? Link to comment Share on other sites More sharing options...
Bakerjd Posted March 15, 2021 Share Posted March 15, 2021 On 3/12/2021 at 11:51 PM, Michael303 said: Thanks for the feedback. Doing the radius by hand seems inelegant compared to milling but I can't think of any other way that wouldn't require a cnc or wider cut to mill the radius. It makes sense that the radius isn't a contact surface but are the horizontal and vertical surfaces adjacent to it contact/impact surfaces or is there supposed to be some clearance? The radius shouldnt be a contact point. Link to comment Share on other sites More sharing options...
Michael303 Posted March 15, 2021 Author Share Posted March 15, 2021 9 hours ago, Bakerjd said: The radius shouldnt be a contact point. Thanks. How about the horizontal and vertical surfaces that touch the radius? Link to comment Share on other sites More sharing options...
MikeBurgess Posted March 16, 2021 Share Posted March 16, 2021 9 hours ago, Michael303 said: Thanks. How about the horizontal and vertical surfaces that touch the radius? yes the vertical and horizontal surfaces are contact, just like on any Para/Clark Ramped barrel, Listener just added a radius to the corner between them to stop cracking, not that with a Clark para ramp cracking is much of a issue, it may have been at 175 PF with guys running supers at 185+pf but I have not seen or heard of that failure in my 10 years in the game. only cracked barrel lugs I have seen were on blown up guns Link to comment Share on other sites More sharing options...
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