The SOLGW Patrol SL 5.56mm 13.9" No BCG/CH Upper Half w/SF Compatible/ROTEX Mount PATROLSLUPPER-13.9-556-SF is engineered for precision and adaptability. This upper features a 13.9-inch barrel with a mid-length gas system, constructed from high-quality 4150 CMV steel. The SF Compatible/ROTEX mount ensures compatibility with SureFire and ROTEX suppressors, enhancing versatility in various shooting scenarios. The upper includes a 13.75-inch L89 rail with 7-sided M-LOK slots and integrated QD sockets, providing ample space for mounting accessories. Ideal for AR-15 builds, this upper does not include a bolt carrier group or charging handle, allowing for personalized customization. SOLGW Patrol SL 5.56mm 13.9" No BCG/CH Upper Half w/SF Compatible/ROTEX Mount PATROLSLUPPER-13.9-556-SF