ETS Sig P320 21 Round 9mm Magazine SG932021

The ETS Sig P320 21 Round 9mm Magazine is built for shooters who want dependable capacity and clear, honest feedback from their gear. Crafted in the USA, this magazine pairs functional transparency with rugged materials so you can load, inspect, and run rounds with confidence. Whether you’re stocking up for range days, prepping for competition, or configuring a duty kit, the ETS 21-round delivers the capacity and durability operators expect without fuss.

The body is molded from clear polymer so you can instantly see remaining rounds and spot any feed issues before they become a problem. That clarity isn’t cosmetic — it’s practical: quick visual checks reduce downtime and improve safety during busy range sessions. Inside, a stainless-steel spring provides consistent, long-lasting tension to feed rounds smoothly and reliably under repeated use. The spring is corrosion-resistant and engineered to hold its shape and rate of force, keeping your magazine functioning through high-round-count drills and storage cycles alike.

Feed geometry and follower design matter, and ETS didn’t cut corners. The black polymer follower is precisely contoured to present cartridges at the correct angle for the Sig Sauer P320 feed ramp, minimizing stovepipes and jams. The follower’s polymer construction is resilient, resistant to deformation, and slides cleanly against the inner walls of the clear body. Down low, a black polymer floor plate closes the unit with a secure fit and provides a comfortable base for rapid reloads — it’s durable enough for hard use but simple to remove for maintenance and cleaning.

Compatibility and fit are engineered to tight tolerances for the Sig Sauer P320 platform, so you’ll get consistent lockups and smooth insertion/removal. The magazine balances a slim profile with above-standard capacity, making it a smart choice for range use or situations where extra rounds matter. Maintenance is straightforward: the clear body and removable floor plate make inspection and cleaning quick, and the durable materials resist typical wear from holster contact and storage.

Overall, the ETS Sig P320 21 Round 9mm Magazine brings practical visibility, robust internals, and American-made quality to your pistol setup. It’s a straightforward, no-nonsense upgrade for anyone who values capacity, reliability, and easy maintenance in a single package.

Order it today from SMKW!