Product Reviews for MT-RM870 - UTG® Remington 870 Optic Mount 12 Gauge Remington 870 Scope/Optic Mount 12 Gauge by Ken (2024-03-01 06:42:25) Rating: 5 / 5 - 5 - Excellent Owned Product for: more than 1 year Pros: This Remington 870 Optic Mount Picatinny rail fits the Remington 870 12 gauge perfectly. It is easy to install the shell holder, which is perfect for me. I recommend Mout to a Remington shotgun owner if you want high quality at a great price. Cons: Other thoughts: High quality at a great price.