Enhance your M16 or M4 rifle's versatility with the NcSTAR MAR6M2 223/556 Carry Handle Picatinny Rail. This high-performance accessory simplifies the mounting of optics and accessories, ensuring a streamlined and functional setup. Measuring 5.25 inches, this robust MIL-STD 1913 rail adapter securely attaches to A1 and A2 carrying handles without obstructing iron sights, thanks to its innovative see-through channel. Crafted from durable black anodized aluminum, it offers reliability and longevity. 5.25" long Picatinny/ MIL-STD 1913 rail adapter mount for M16/ 223/556 Rifle/ M4 receivers with A1 & A2 carrying handles. Designed for easy mounting of optics and accessories atop the carry handle. Compatible with A1 and A2 receivers, as well as most mil-spec detachable carry handles. See-through channel allows the use of iron sights when rail is mounted. Includes mounting thumb nut for hassle-free installation. Constructed of tough black anodized aluminum for maximum durability. Equip your rifle with precision and confidence using the NcSTAR MAR6M2 Carry Handle Picatinny Rail.