Choate Tool Remington 870/1100/1187/Versamax 8 Shot Extension +3 Rounds 12 Gauge. The +3 from this Magazine Extension from the experts at Choate Tool adds to your shotgun magazine capacity allowing you to pump up your firepower in the field. The Choate Remington Magazine Extension kit is easy to install with no gunsmithing required. This magazine choke extension kit includes everything needed to install with dimples that need to be drilled out on the newer model Remington 870/1100/1187 shotguns; the dimples need to be drilled out with a 3/16 drill bit in order for the spring to extend up into the magazine extension. The Choate Remington Extension 8 Shot Magazine Extension +3Rounds includes the spring a high visibility shell follower and a long spring allowing you to easily install and use this shotgun magazine extension from the professionals at Choate Tool. Amplify the fire power of your shotgun magazine with the Choate Tool Remington Magazine Extension +3Rounds Magazine Extension. Specifications for Choate Tool Remington 870/1100/1187/Versamax 8 Shot Extension +3Rounds: Manufacturer: Choate Tool Magazine Capacity: 8 Round Condition: New Country of Origin: USA Features of: Adds +3 shotshells Machined from steel Package Contents: Choate Tool Remington 870/1100/1187/Versamax 8 Shot Extension +3Rounds Spring Follower Clamp Choate Tool CMT-01-04-03: Remington 870/1100/1187/Versamax 8 Shot Extension +3 Rounds 12 Gauge