ETS Group SG9-320-21 Sig P320 9mm Luger 21rd Clear Detachable Magazine

The ETS Group SG9-320-21 is a high-capacity, extended pistol magazine chambered in 9mm Luger and built specifically for the Sig Sauer P320. Carrying a hefty 21-round capacity, this mag is a natural fit for range training, competition, and duty use where maximum round count between reloads matters.

Constructed from advanced polymer, the magazine body is engineered by ETS (Elite Tactical Systems) to resist extreme impact, UV, and temperature swings, so it holds up to drops, daily carry, and rough handling without cracking or breaking. The signature clear translucent body lets you verify your round count at a glance, while a black polymer follower and floor plate paired with a stainless steel spring keep feeding smooth and reliable across the full 21-round stack.

Designed as a direct detachable drop-in fit for the Sig Sauer P320, the SG9-320-21 installs and removes like the factory magazine and delivers the same rugged, lightweight, translucent construction ETS is known for across its pistol magazine line.