The Locust is a light weight, ergonomic, and modular Airsoft upper receiver made by SideCar Customs. The Locust Lancer Compatible Upper is Exclusively Retailed only here at The Real Deal Airsoft This upper has picatinny rail space on the lower portion to be able to mount grips and hand stops, as well as an optional Picatinny Mount designed for optics / red dots included with your upper. Under the muzzle thread protector are your standard -14mm CCW Threads, ready to accept tracers and muzzle devices. light weight cut outs throughout the body to reduce the overall weight of your build. Fiber optic front sightWe recommend to use our Real Deal 220mm & 160mm Steel Inner Barrels ! Compatibility Can be used for V2 AEG / V2 HPA Hopup Unit Compatibility: Maxx, Retro Arms, Arc Package Contents: 1x Locust Upper, 1x Picatinny Panel AdapterPlease pay attention to which Variant Compatibility you choose, The difference lies within were the front body pin post aligns and the thickness of that post. With modifications you can make anything work, however if you want a drop in experience, use the correct lower to the correct upper variant.