I replaced the aftermarket forearm on my A590 with the OEM Slide and nut from Mossberg
Action Slide, 12 Gauge, 7 3/4
1
Action Slide Nut, 12 Gauge, Blued, For 7 3/4" Slide Assembly
so I could add an Insight Tech Forearm, Synthetic, 12 Gauge (Fits 7 3/4" Action Slide)
Since taking everything...