The Glock 41 Gen 4 is a practical/tactical 45 ACP pistol designed with the superior engineering to maximize sight radius while improving weight distribution and balance. Its longer barrel and slide help to reduce muzzle flip and felt recoil while the longer sight radius provides better accuracy for competition or duty use. The Glock Modular Optic System (MOS) simplifies the mounting of popular optics without costly custom-machining of the pistol's slide. MOS has four plate options to comply with the specifications of some of the most trusted optic manufacturers in the industry, and a cover plate when no optic is mounted. MOS gives you the option of adding tall iron sights allowing the optic and the iron sights to co-witness. This pistol does not include the modular sight, just the bracket to mount it on.