how do you replace the aluminum butt to a buck knife model 124?

Answer 1

BUCK will repalace it free,i have returned 4.postage 1 way.
How to Obtain Warranty Performance
Describe your problem
Write a note describing the problem with your knife. On the note, be sure to include your name, address, phone number and e-mail address (if applicable).


Wrap your knife
For safety and protection of your knife, please clean it, then put it in the sheath, if you have one. If not, please clean and wrap your knife (cardboard works well) so that it is protected during shipping and that the point does not cut through the packaging (particularly for fixed blade knives). After we have worked on your knife, we will return it in your sheath (or in a cardboard sleeve if no sheath was sent).


Package your knife
Packaging your knife in a box is preferred, but a padded envelope may also work, provided your knife is not too heavy or too bulky. Please put some packing around the knife so it does not roll around inside your package. Please use tape rather than staples for sealing your package.


Send your knife to us
To protect you against the possibility of loss of your knife, we recommend insuring your parcel and sending it trackable by certified receipt (at your expense). Note that cost of shipping your knife to the Buck factory and knife loss are not covered by our warranty. When your knife has been repaired, we will return it postage paid to you. Send your parcel to:

Buck Knives
Customer Service
660 S. Lochsa St
Post Falls, ID 83854
[phone] x184
We make our best effort to repair and return your knife.
http://www.buckknives.com/warranty.php

Answer 2

Your best bet is to return it to Buck for repairs.