Keep your B&T USW running with factory-correct reliability and extra on-tap capacity using the B&T Handgun Magazine for USW 9mm Luger – 19 Round (BT-430033). Built by Brugger & Thomet (B&T) to match original equipment specifications, this genuine 19-round 9x19mm magazine is designed to deliver smooth feeding, consistent lockup, and dependable performance—whether you’re training, competing, or simply want more time shooting between reloads. This is the magazine commonly listed as compatible with the USW-A1 platform (and also referenced as compatible with the MK-II in some B&T parts listings). bt-parts.com+2midwestgunworks.com+2
MPN: BT-430033 • UPC: 840225700190
Purpose-built for the B&T USW platform
B&T’s USW series is all about control, speed, and precision—so your magazine needs to be as dependable as the firearm it feeds. The BT-430033 is a factory-original magazine intended for the USW family, giving you the fit and function you want when you’re relying on a premium platform. Retail listings repeatedly describe it as a genuine B&T/USW magazine with 19-round capacity in 9mm Luger. impactguns.com+2GunMag Warehouse+2
19-round capacity: more shooting, fewer reloads
A 19-round magazine hits the sweet spot for the USW: enough extra capacity to stay productive on the range and efficient in training drills, without feeling oversized or awkward. It’s ideal for:
High-rep range sessions and classes
Reload-reduction in competition-style practice
Keeping a spare magazine staged for quick swaps
Durable metal construction with practical details
Many retailers describe this magazine as a steel magazine (often listed with a black oxide/blued finish), built to handle hard use while maintaining consistent feeding geometry. Some listings also call out witness holes for quick round counts, plus a stainless spring and polymer follower for smooth feeding. (Specific finish descriptions vary by retailer, but the intent is consistent: factory-quality durability and reliability.) GunMag Warehouse+2impactguns.com+2
OEM-spec reliability for consistent feeding
Aftermarket magazines can be hit-or-miss—especially on premium firearms with tight tolerances. This BT-430033 magazine is widely described as a factory replacement made to B&T’s specifications and tolerances, using original-style manufacturing and materials. That’s exactly what you want if you care about:
Consistent feeding under fast strings
Proper seating and lockup
Reliable last-round behavior
Minimizing stoppages during training
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Compatibility and fit notes
This magazine is commonly listed for the B&T USW-A1 in 9mm Luger and is also referenced as compatible with the MK-II in B&T’s own parts listing. Always confirm fit with your specific model/version before purchase, especially where regional compliance restrictions may apply. bt-parts.com+1
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The bottom line
If you want an OEM-correct spare or replacement magazine that matches the performance expectations of a B&T USW, the B&T BT-430033 19-Round 9mm Luger Magazine is the right choice. It’s factory-spec, purpose-built for the platform, and designed to keep your USW running smooth—shot after shot, drill after drill.
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