BSK43 
Operation: Realistic blowback with moving slide, slide lock‑back, and functional ejection port
Ambidextrous: Magazine release, slide release, and safety lever usable on both sides
Adjustable Trigger: Travel distance can be tuned to preference
TDC Hop‑Up: Externally adjustable without disassembly
Tactical Options:
Red‑dot sight ready (adapter not included)
M14 reverse‑thread muzzle for suppressors/tracer units
Under‑rail for lights or lasers