3D printed M4 adapter for M870 designed by Repairsoft.
Made for PTS magazines
No wobble from adapter to replica
No wobble from mag to adapter
Inside the M4 adapter are raised ribs to make the magazine sit tightly.
when filing these down you can make the magazine drop easily
preferred in speedqb
Important: you do need the remove the loading port (metal bracket which can be cut out with pliers)
PTS magazine not included.