990 SPX Magpul - Class 3 vs Mossberg 590

2015–Present

1994–Present

~150,000 estimated

~2,500,000+ units (global estimate, including civilian and law‑enforcement sales)

965 mm (38 in) with stock extended, 889 mm (35 in) with stock collapsed

1,016 mm (40 in) with 14‑in barrel; 1,137 mm (44.75 in) with 18.5‑in barrel; 1,219 mm (48 in) with 20‑in barrel

508 mm (20 in) standard, 457 mm (18 in) Compact variant

356 mm (14 in) short barrel variant; 470 mm (18.5 in) standard barrel; 508 mm (20 in) extended barrel

3.40 kg (7.5 lb) empty (standard), 3.10 kg (6.8 lb) Compact

3.2 kg (7.0 lb) empty (14‑in barrel); 3.4 kg (7.5 lb) empty (18.5‑in barrel)

5+1 rounds standard internal tube, 7+1 with extended tube, 8+1 with aftermarket magazine tube

5+1, 6+1, 8+1, 10+1, 12+1, 14+1, 16+1, 18+1, 20+1 shells depending on tube length

Pump‑action, long‑stroke recoil operation with chrome‑lined barrel and stainless‑steel bolt

Pump‑action, manually operated sliding fore‑end with rotating bolt lock‑up; chrome‑lined barrel for corrosion resistance

Dual‑stage, single‑action trigger with adjustable pull weight

Single‑stage trigger with integrated manual safety/trigger lever; ambidextrous safety lever on the top of the receiver

Fiber‑optic front bead, rear ghost‑ring sight; optional Picatinny‑mounted night sights

Standard front bead; optional ghost‑ring rear sight on tactical models; some variants equipped with detachable rifle‑style sights