Zius BK1S AEB Blaster

The Zius BK1S AEB Blaster is one of the most searched automatic electric blasters in the nerf community — often just called the Zius BK1S or simply the BK1S — thanks to its mil-spec 7.5-inch handguard, real buffer tube, and drop-in buttstock that make it feel like a genuine AEG platform. Inside, a T238 MOSFET (comparable to a reversed-scale or LN01 board) drives jam detection plus true semi (single or double shot) and full-auto fire modes, delivering a consistent 170-180 FPS on Zius Bamboo Darts. It runs on a 3S 11.1V LiPo through an XT-30 connector and ships with a 24cm barrel and its own proprietary BK1S magazine — no adapters needed.

Every box includes the BK1S blaster, one magazine, and 30 Zius Bamboo Darts to get you shooting immediately. Since October 2024 the blaster ships partially disassembled in a smaller box for safer international shipping; our reassembly guide walks you through putting it back together, and our team is on hand if you need help. If you've been comparing the Zius BK1S vs BK2S, the BK1S is the mil-spec-buffer-tube original — the platform this whole lineup is built around.