Gmcrigger2007 Posted June 24, 2014 Posted June 24, 2014 Do you have to change the spring when using the Benelli Factory 2 round extension tube ? Quote
Gmcrigger2007 Posted June 25, 2014 Author Posted June 25, 2014 What's a good source for upgrading the spring when using the Factory Benelli 2 rd extension? looks like Benelli only supplies the extension tube. Quote
heckler&kochp2000 Posted June 25, 2014 Posted June 25, 2014 No need to change the spring, it's a option but not needed. Benelli already includes the full size spring on every m4. Quote
Unobtanium Posted June 26, 2014 Posted June 26, 2014 No need to change the spring, it's a option but not needed. Benelli already includes the full size spring on every m4. Using said spring resulted in multiple failures directly attributed to said spring, when I tried it. You need more tension. Quote
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