SIG SAUER MAGAZINE MPX 9MM BLK 20RD

Magazine reliability shapes how your rifle performs downrange, and operators from Vallejo to the Bay Area trust purpose-built designs that feed without hesitation. The SIG SAUER MPX 20-round magazine delivers consistent ammunition positioning through every firing sequence. Understanding your local shooting regulations matters—review California firearm laws before your purchase.

9mm feed geometry and spring engineering

SIG SAUER engineered this 20-round magazine for the MPX platform, where feed angle and witness holes matter for tactical reliability. The magazine body sits at optimized geometry to ensure rounds stack predictably under pressure. Spring tension holds ammunition at the correct height for the breech face to chamber smoothly. Whether you're running drills or defensive practice, consistent feed eliminates variables. For additional guidance on state-compliant firearms and accessories, visit PC §32100 exempt revolvers resources. Browse our gun shop.

Frequently asked questions

Will this magazine work in all SIG SAUER MPX rifles?

Yes. The SIG SAUER MPX magazine is engineered for all MPX platform rifles in 9mm, regardless of barrel length or stock configuration. The magazine well dimensions remain consistent across MPX variants.

What's the witness hole for on this magazine?

Witness holes let you verify round count at a glance without removing the magazine. They're drilled at regular intervals so you can see ammunition level during tactical reloads or magazine checks.

Where can I ship an online gun order near San Jose?

TacticCAL Gun Store in Sunnyvale receives online firearm orders for buyers throughout the South Bay, including San Jose, Santa Clara, and the surrounding Bay Area. TacticCAL is your gun shop Sunnyvale in the Bay Area.