Model: SCRA-38<br />Top rail length: 155mm (6.1 inch)<br />Bottom length: 115mm (4.5 inch)<br />Weight (net): 155g (5.5 ounce)<br />heavy duty and in precision<br />High quality aluminum alloy in durable black matte finish<br />Top low profile see-through picatinny rail<br />Side picatinny rail<br />Shock proof can be used on real fire caliber<br />Fits Remington 870 Shotgun 12 Ga. and Compatibles<br />Two locking bolts included for replacing the original trigger pins<br />Vector Optics and made in China under our strict quality control