Acetech Blaster with M14- to M11+ adapter Color:Black they are a well known

they are a well known brand in Asia for quality upgrade parts at a affordable price

but rather that the edge if the trigger guard on these guns

MAF Polishing Technology for greatly smoother operation

and LM4 PTR Series part 196

Acetech Blaster with M14- to M11+ adapter Color:Black they are a well knownDimensions (L x D): 76mm x 32mm. ; Weight: 70g (w o adaptor) Thread Direction: 14mm CCW (Negative). Blaster simulates the muzzle flash function. Battery: Li Ion, rechargeable. Three blaster mode: Tracer and flame Flame only Tracer only Supports Green Tracer & Gel BBs Intelligent Power Control Waterproof Micro USB Charging Up to 35 RPS Package contents 1) Blaster 2) M14 to M11+ Adaptor 3) Micro USB Charging Cable 4) Allen Key 5) User Manual You Might