Selling my Built Colt M4A1 Polarstar Kythera. It’s a rifle made for both CQB maneuverability and long range accuracy. This rifle is powered by a Polarstar Kythera. This is polarstars only mechanical engine which means it has a realistic trigger pull (break and reset) as well as not needed any electrical components. Simply plug in your airline and you’re ready to shoot. It has a closed bolt system same as the Polarstar fusion engine and F2 which allows for extreme consistency and accuracy. This engine is semi only with no full auto function It’s a full metal body which is extremely comfortable to hold. It has a tuned speed trigger to make shooting easier. Shoots 400fps at 100psi with a .25g bb. FPS range is 300-430. Comes a shown but without attachments or magazine. Tracer unit, battery charge, battery, fcu, airtank, regulator, and line can be added for extra. NO TRADES FOR HICAPAS, SNIPERS, OR GBBRS Parts list: Colt receiver 10in laced keymod rail Adjustable VFC Stock PTS Stippled grip Polarstar Kythera Red Speed trigger Aluminum Hopup unit Maple leaf bucking 6.03 280mm inner barrel