PM me - I've got several things you can use but when building/modifying composite I've had great results with knurled brass nuts bedded in the stock. I've also got 10-32 'studs' to protect the hole when ever you take the sling-swivel stud out. I advise using that when shooting on a rest or with hard bags - you'd be surprised how many sling swivel stud 'sleeves' get battered loose because people only think to take a sling off, and leave the swivel stud (clevis-head bolt) to catch on front and/or rear bags when they shoot. Anyway, I can fix you up.
BTW, not all sling swivels are 10-32 - some including Uncle Mike's also use 10-24 bolts and some have really course, wood screw threads which I've seen even on composite stocks.
Last edited by Offshoreman; 02/01/19.