The Carlson's Remington 870 Express 12 ga 3" 18.5" Barrel Rem Choke with Adjustable Rifle Sights and Cylinder delivers a versatile, ready-to-hunt replacement barrel built for Remington 870 platforms, crafted from certified ordinance grade 4140 steel with chrome lined bores for durability and long-lasting accuracy. Vent rib models feature a satin matte blue finish with a red fluorescent front sight and a brass center bead for fast target acquisition in varied lighting, while the 18 1/2" non-vent ribbed variant uses a ramped front sight and a matte finish for a clean, snag-free profile. Each Carlson barrel is threaded for the standard Rem Choke system, enabling quick changes of choke tubes to adapt to different shooting scenarios, from tight shot patterns at longer distances to broader patterns in home defense or turkey hunting. The included stainless steel choke tube tubes are manufactured from 17-4 stainless steel, with rifled choke tubes produced from 304 high stress stainless steel for added strength and reliability. This replacement shotgun barrel enhances the Remington 870s versatility and performance by pairing rugged construction with precise fit and easy maintenance, helping shooters optimize their shotgun for a range of field and competition applications without sacrificing reliability or speed.