990 SPX Magpul - Class 3 vs AA-12

2015–Present

1996–Present

~150,000 estimated

~10,000 estimated

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

965 mm (38 in) with stock extended; 820 mm (32.3 in) collapsed

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

457 mm (18 in) standard; 381 mm (15 in) compact variant

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

5.5 kg (12.1 lb) empty

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

20‑round drum standard, 8‑round box, optional 30‑round drum

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

Gas‑operated, closed‑bolt, rotating bolt with recoil‑mitigation buffer

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

Select‑fire trigger with Safe, Semi‑auto, and Full‑auto modes

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

Fixed iron sights (rear notch, front bead) with Picatinny rail for optics