900.00 Mossberg 590A1 (M590A1) 12 Gauge Heavy Walled Barrel Ottawa Apr 9, 2024 - 1:40 PM [email protected] Mossberg M590A1. Excellent condition, very few rounds fired. MIL-SPEC 3443G. Heavy-walled 20 " barrel, 3" chamber, metal trigger guard and safety, clean out mag tube, and Parkerized finish. Ghost Ring Sights, Speed load stock.