Heckler & Koch 512

The Mossberg 990 SPX (Special Purpose eXtreme) is a purpose‑built, 12‑gauge pump‑action shotgun designed for tactical, law‑enforcement and civilian defensive use. Introduced in 2015, the 990 SPX incorporates a heavy‑weight, chrome‑lined barrel, a reinforced receiver, and a Magpul M‑LOK handguard system that allows rapid attachment of accessories such as lights, lasers and foregrips. Its design philosophy emphasizes reliability under adverse conditions, rapid follow‑up shot capability, and modular ergonomics. The shotgun features a dual‑stage trigger, a ghost‑ring safety, and an oversized ejection port for reliable shell ejection. The 990 SPX has earned a reputation for ruggedness and low recoil, making it popular among SWAT teams and civilian home‑defense enthusiasts. Unique characteristics include a 20‑inch barrel with a ported choke, a proprietary “SPX” stock with adjustable length of pull, and a stainless‑steel bolt that resists corrosion.

A classic gas-operated semi-automatic shotgun known for reliability and smooth operation. The Model 1100 became one of the most popular semi-auto shotguns.

The Remington Model 11 is a semi-automatic shotgun manufactured by Remington Arms in the United States. It is a licensed copy of John Brownings Auto-5 design produced under patent from Browning. The Model 11 uses a long-recoil operating system where the barrel and bolt recoil together for the full length of the stroke. It was chambered in 12, 16, and 20 gauge. Remington produced the Model 11 from 1905 until 1948.