On USRO:
M-10 Scabbard. Will fit all US bayonets and knives with blade profile similar to AR M-7 bayonet. This can, in conjunction with a MOLLE adaptor, or MOLLE
KBAR Adaptor be mounted on PALS/MOLLE platforms. Both adaptors available in different colors/camo pattern. The KBAR adaptor is more versatile, as it will accept a scabbard with a belt loop as well as any item with the old belt hooks. Simple MOLLE adaptor is intended for items with belt hooks or ALICE clips.
The body of the scabbard, being plastic, can be sanded and painted. Suggest using spray paint specially intended for use on plastic, as it is likely to hold up better. Stronger and cheaper than the semi-collectible older GI scabbards.
I got mine. Passing along the info.
Disclaimer: no financial interest.