Fits RM 870 Shotgun and Variants * Precision Machined from Aircraft Aluminum with Maximum Strength * Low Profile with See-through Feature and V-cut on Top Rail, 14 Picatinny Slots on Top * Simple and Friendly Installation, No Gunsmith or Tool Required * Solid Locking Features for Most Secure Fit * Ultimate Tactical Solution to Enhance Accuracy under Toughest Environments * Hard Anodized Finish for Wear Resistance