990 SPX Magpul - Class 3 vs Benelli M4

2015–Present

1998–present

~150,000 estimated

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

1003 mm

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

470 mm

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

3.82 kg (8.4 lb)

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

7+1 rounds

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

Semi-automatic

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

Single-stage

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

Ghost ring