Remington 870 Express Magnum 12 Gauge Pump-Action, 18.5 in Vent-Rib Cyl Bore Barrel, 3 in Chamber, ATI Adjustable Stock, TacStar SideSaddle
This Remington 870 Express Magnum is a 12-gauge pump-action configured with practical upgrades and a compact field barrel. It features an 18.5 in vent-rib cylinder bore (Cyl Bore) barrel with a 3 in chamber, an ATI adjustable 6-position pistol-grip stock, and a TacStar 6-round receiver SideSaddle. Built on the Magnum receiver (identified by the serial suffix "M") with dual action bars and a matte oxide finish characteristic of the Express line, it delivers a durable, ready-to-use setup.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Specific Condition Notes: There are markings and light areas of surface rust from prior handling and use. See the photos for a complete view of the exterior surfaces and markings.
What’s Included
- TacStar SideSaddle receiver-mounted 6-shell carrier (installed)
- Advanced Technology, Inc. adjustable M4-style buttstock with pistol grip (installed)
- Slip-on rubber recoil pad on buttstock (installed)
- Fiber-optic twin-dot front sight on vent rib (installed)
The 870 Express Magnum platform uses a carbon-steel receiver with right-side ejection, dual action bars, and a cross-bolt safety. This example retains the matte black oxide finish typical of the Express series and is marked as a Magnum receiver, denoted by the "M" serial suffix.
The 18.5 in carbon-steel barrel is a ventilated-rib field tube with a true cylinder bore (Cyl Bore) for wide, even patterns. The chamber is marked "12 GA. 2 3/4 or 3" and accepts both 2 3/4 in and 3 in shells. A fiber-optic twin-dot front bead on the rib provides a bright, easy-to-pick-up sight picture.
Furniture is synthetic throughout, including a molded fore-end with grasping surfaces and an Advanced Technology, Inc. adjustable 6-position M4-style stock with pistol grip. The setup provides an 11.0 in length of pull and includes a slip-on rubber recoil pad for added shoulder interface.
On-gun ammunition management comes from a TacStar receiver-mounted SideSaddle that carries six 12-gauge shells. Capacity is 4+1 with 2 3/4 in shells or 3+1 with 3 in shells, supporting both field and defensive loading configurations.