Nordic Components 20 Gauge Shotgun Extension Tube Kit

Nordic Components shotgun magazine extension tube kit for increasing magazine capacity. Use in conjunction with the 20 gauge extension tube nut, this tube kit will add the listed number of rounds to your existing magazine capacity. All capacities are measured using 2.75″ star-crimped shells; for use with 3″, increase your selection by one round. Kits ship with extension tube, and full-length spring. To determine the length of the extension in relation to your shotgun, reference the measurement diagram and dimension table below. Note that the tube nut will add between .750″ and 1.000″ depending on the shotgun model. 

Specification 

• Anodized 6061 aluminum for strength and weight
• Available in a variety of lengths providing capacity increases of +6 to +7
• Relief groove located off-center to allow location adjustment by reversing the tube
• Machined with matching thread pitch on both ends to allow reversing the tube