FPVKing QL7 296mm FPV Racing Drone Frame 7 inch Carbon Fiber Quadcopter Frame with 4mm Arm + Lipo Battery Straps: The FPVKing QL7 is a high-quality carbon fiber quadcopter frame designed for FPV racing. It features a 296mm arm length and a 7 inch size, making it perfect for freestyle and stunt flying. The frame also includes lipo battery straps to securely hold your batteries in place during flight. Overall, the FPVKing QL7 is an excellent choice for experienced pilots looking for a durable and reliable quadcopter frame. gouduoduo2018 GEPRC Mark4 Mark DIY FPV Racing Drone Frame 5mm Arm Freestyle X Quadcopter (6inch 260mm): The gouduoduo2018 GEPRC Mark4 is a versatile and customizable quadcopter frame designed for both freestyle and racing. It features a 5mm arm length, making it easy to adjust the height of your camera and other components. The frame also includes pre-installed XT60 connectors for easy wiring and compatibility with a wide range of FPV equipment. Overall, the gouduoduo2018 GEPRC Mark4 is an excellent choice for pilots looking to build their own custom quadcopter. iFlight DC5 222mm 5inch HD FPV Freestyle Frame Kit with 5mm Arm Compatible 5inch Prop for DJI FPV Air Unit DJI Digital FPV System: The iFlight DC5 is a high-performance quadcopter frame designed specifically for the DJI FPV system. It features a 222mm arm length and a 5 inch size, making it perfect for freestyle flying. The frame also includes pre-installed XT60 connectors for easy wiring and compatibility with the DJI Digital FPV System. Overall, the iFlight DC5 is an excellent choice for pilots looking to take their FPV game to the next level. Readytosky 220mm FPV Racing Drone Frame Carbon Fiber 5 inch Quadcopter Frame Kit 4mm Arms FPV Quad Unibody Frame: The Readytosky 220mm is a high-quality carbon fiber quadcopter frame designed for racing. It features a 220mm arm length and a 5 inch size, making it perfect for fast-paced stunt flying. The frame also includes pre-installed XT60 connectors for easy wiring and compatibility with a wide range of FPV equipment. Overall, the Readytosky 220mm is an excellent choice for experienced pilots looking for a durable and reliable quadcopter frame. DSstyles Newest GEPRC Mark4 Mark 225mm 260mm 295mm FPV Racing Drone Frame Freestyle X Quadcopter 5mm Arm GEP 5" 6" 7" RC Drone 225mm: The DSstyles Newest GEPRC Mark4 is a versatile and customizable quadcopter frame designed for both freestyle and racing. It features a 5mm arm length, making it easy to adjust the height of your camera and other components. The frame also includes pre-installed XT60 connectors for easy wiring and compatibility with a wide range of FPV equipment. Overall, the DSstyles Newest GEPRC Mark4 is an excellent choice for pilots looking to build their own custom quadcopter. gouduoduo2018 GEPRC HD5 224mm FPV Racing Drone Quadcopter Frame fit for DJI Sky end: The gouduoduo2018 GEPRC HD5 is a high-performance quadcopter frame designed specifically for the DJI Skyend system. It features a 224mm arm length and a 6 inch size, making it perfect for fast-paced racing. The frame also includes pre-installed XT60 connectors for easy wiring and compatibility with the DJI Digital FPV System. Overall, the gouduoduo2018 GEPRC HD5 is an excellent choice for pilots looking to take their FPV game to the next level. DSstyles Newest GEPRC Mark4 Mark 225mm 260mm 295mm FPV Racing Drone Frame Freestyle X Quadcopter 5mm Arm GEP 5" 6" 7" RC Drone 295mm: The DSstyles Newest GEPRC Mark4 is a versatile and customizable quadcopter frame designed for both freestyle and racing. It features a 5mm arm length, making it easy to adjust the height of your camera and other components. The frame also includes pre-installed XT60 connectors for easy wiring and compatibility with a wide range of FPV equipment. Overall, the DSstyles Newest GEPRC Mark4 is an excellent choice for pilots looking to build their own custom quadcopter. In conclusion, these are some of the best products available in the market for building your own FPV racing drone. Each product has its unique features and specifications that make it suitable for different types of flying. For experienced pilots who want a durable and reliable frame, Readytosky 220mm and DSstyles Newest GEPRC Mark4 are excellent choices. On the other hand, if you're looking to build your own custom quadcopter, gouduoduo2018 GEPRC Mark4 HD5 and DSstyles Newest GEPRC Mark4 are great options.