Drilling CP ASA for pneu frame

[Gadget]

I'm sure I saw I guide to this once, but can't seem to locate it.

I've got a M90 frame with pneu internals installed and now want to mod my direct mount CP asa to stealth my LPR. Couple of specific questions:

- Is it possible to remove the internals of a CP direct mount in order to avoid fouling anything when drilling?

- What type of bit do I need (specifics and/or link would by good) in order to create the flat countersunk area on top to hold the o-ring? I've only got a bench drill press at my disposal, not a mill.

Thanks

[BigEvil]

Loguzzzzzz is the man for this.

[Gadget]

Ideally I'd love to pass it to someone else to do a proper job, but as I'm in the UK shipping costs make it an expensive proposition!

[mag79]

Here you go

http://www.automags.org/forums/showthread.php?t=232154

[Gadget]

Thanks. Would an end mill fit into a standard drill press chuck (assuming it will only be used in the vertical, not for horizontal cuts)?

[mag79]

Thanks. Would an end mill fit into a standard drill press chuck (assuming it will only be used in the vertical, not for horizontal cuts)?

yes but the chuck on a drill press wobbles too much

[Gadget]

Would this be suitable for milling the o-ring pocket?

http://bit.ly/ataCfP

[redlaser666]

Would this be suitable for milling the o-ring pocket?

http://bit.ly/ataCfP

The end mill in that link is a ball nose. So it wont do a flat bottom you need for the o ring.