Benelli M4 Wolff Magazine Spring

The Wolff Benelli M4 Magazine Spring:   The Benelli M4 Wolff Spring is custom designed and manufactured to our specifications specifically for use with 7-round capacity magazine tubes such as the Benelli M4 extension tubes. The purpose of these increased power magazine springs is to improve the reliability of your shotgun, while also increasing room in the magazine tube compared to the OEM spring.  Also see the Benelli M4 "Max Room" Follower for more room in your magazine tube. Note: these springs will also work in 5-round magazine tubes but may be difficult to install due to the increased power.   Difference between the Wolff Springs vs the Shell Springs Both magazine springs are made to the same specifications. The only difference is the Wolff Spring is made by Wolff Gunsprings, while the Shell Spring is made by Shell Tactical.   Reliability of the Wolff Magazine Spring   The OEM Spring that comes factory with your Benelli M4 works well when new but tends to take a set quickly and