There is nothing in the construction of one of those Cutts Compensator tube boxes one would need a biscuit joiner for. They are just two pieces of wood, the body and the lid. What would be hard to come by would be the spring steel bracket to hold the gauge specific tube wrench and the brass name plate --

[Linked Image from i.imgur.com]

or later decal.

[Linked Image from i.imgur.com]

The six-hole box is for 12-gauge tubes and the three-hole for the smaller gauges for which only three tubes were offered..