I stick a short cleaning rod up the recoil tube while stuffing the spring back in. Doing it so makes me not care about the drainage hole and I won’t be dunking my M4 in water any time soon.
If the drainage holes are a concern, it wouldn’t be difficult to drill them in.
Once the spring is in, getting the retaining screw back in is made easier with Doge’s retaining screw driver tool.
Just wanted to pass along Merry Christmas & Happy New Year wishes to everyone and your families on this forum..which I have found to be the very best & most resourceful firearm forum found anywhere!
Raise a toast and cheers to all owners of the best practical designed, most reliable, multi-war-battle proven, semi auto 12 gauge shotgun ever made..the honorable Benelli M4..cheers!!