Almost all our buttstock that MDT offers have a Quick Disconnect (QD) cup milled into it. Our Skeleton Rifle Stocks (SRS) usually have four (2 on each side) and the Skeleton Carbine Stocks (SCS) have at least one on each side with possibly another on the bottom.
Every MDT Chassis (with the exception of the ACC) comes with a sling stud mounted in the forend. If you were wanting to mount a QD sling there are always options for adding them.
Gen 1 Chassis (no M-LOK)
You can use our bolt-on Picatinny rails, the 5" and 6.5" versions have a QD cup built-in, they are available here.
Gen 2 Chassis (M-LOK)
You are able to use M-LOK accessories on any of our second-generation chassis with the M-LOK forend. There are a couple of versions available, you can use the dedicated sling up here, or you can use a Picatinny rail that has one built-in (Every rail 4" and longer has at least one) available here. Also, if you want to add a little balance to your rifle, you can add our M-LOK Exterior Forend Weights which each one had a QD built-in, available here.