You must remove inner spring retention ring by trimming about 1/4" of threads and Benelli Nova tube extensions will thread right on. No cycling issues for me. GL!

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I have not found where anyone has added a extension. I suggest that you contact RIA and see if they can assist you a good machinist should also be able to make a adapter so you could use one from a Remington or Mossberg contact for RIA Phone: (775) 537-14

Rock Island Armory X4 Tactical X4

Name: Rock Island Armory X4 Tactical X4
Brand: Rock Island Armory
SKU: 48138
Rating: 1 (1 reviews)

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1 Reviews

MSRP:

$240.01

Used Price:

$240.01

Sale Price:

$266.68

Rock Island Armory X4 Tactical X4 Gun Stats

Rock Island Armory X4 Tactical

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Brand Rock Island Model Tact Series Shotgun Gauge 12 Gauge Action Semi-Automatic Sights Bead Capacity 4+1 Chamber 3" Chokes Included F,IC,M Hand Right OAL 39.37" Receiver Description Aluminum Alloy Stock Description Black Synthetic Weight 7.05 lbs Barrel Description Vent Rib Search Code ROCKI Similar Items SG12 Barrel Length 18.5"