Nordic Components' Magazine Extension Tube Assemblies allow shooters to increase the ammunition capacity of their shotgun for use in action shooting competitions such as 3 Gun, for home defense, or for hunting. Installation can be achieved in just minutes with a few hand tools, and since no permanent modifications to the host firearm are required it can be easily converted back to its factory original configuration if desired. Nordic's shotgun tubes are precision machined from 6061 aircraft aluminum tubing for light weight and strength, while their replacement magazine tube nuts are designed to closely conform to the OEM part's general style and size for greater compatibility with different factory and aftermarket forends. This complete assembly includes a magazine extension tube, extension tube nut, standard size end cap and magazine tube spring.
Compatible with Browning Gold and Silver, FN SLP, Winchester SX2, and SX3 shotguns in 12 Gauge only.
Plus 1 capacity tubes have a fixed end cap (not removable like plus 2-8 round capacity tubes).
Manufacturer highly recommends the use of a barrel clamp (Product # 667-570 or 185-334) for stabilization on any extension tube with a capacity over 5 Rounds.
To determine the maximum length of the extension tube you'll want to use on your shotgun, measure the distance from the front of the barrel lug or forearm to the end of the barrel.
All extension tube assemblies come with an oversize magazine tube spring that must be trimmed to the appropriate length for the selected tube size. With the tube installed on the gun and end cap removed, insert the magazine tube follower and spring. For proper spring tension and cycling, trim the spring's length so that NO LESS THAN 12" of it is exposed from the end of the extension tube with the end cap removed.
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