Usually, magazine extension is one of the first upgrades shotgun owners get. It is understandable because standard 4+1 round capacity is very limited.

One of the popular questions: What magazine extension for Remington 870 should I get to have it flush with the barrel?

Wilson Combat +2 Magazine Extension and Nordic Components Clamp

Wilson Combat +2 Magazine Extension and Nordic Components Clamp

If you want to get a magazine extension for Remington 870 with 18 inch barrel, get a +2 round mag extension tube. If you want to add magazine extension that will not exceed the barrel length of 20 inch barrel Remington 870 get +3 round mag extension.

Related Posts:
Magazine Extensions for Remington 870 Shotgun (Nordic Components, Choate, TacStar, Remington, ATI)

Remington 870 Wilson Combat Magazine Extension Review

Remington 870 +2 Magazine Extension Tube Review