Mossberg Shot tube extension?

DennyB · August 23, 2005, 04:36 PM

Why cant I find a 7 or 8 shot tube extension for my Mossberg 500A I see Rems and Winchester but not Mossberg?

CaCrusin · August 23, 2005, 04:52 PM

The Mossberg magazine tube is closed on the end and cannot be extended as that is where the barrel attaches to the mag tube. There is no way to add capacity to a Mossberg 500 other than the Knoxx Sidewinder. This kit converts the 500 to magazine feed and has a 10-round drum magazine that is interchangeable with a 6-round box magazine.

rugerdude · August 23, 2005, 05:03 PM

Yep, the tube is just plain blocked off. The side winder kit looks neat, but if I recall, it costs more than the gun, or at least over 100 bucks. I also don't know about the reliability.

However, the 500a is still a great gun.

mikikanazawa · August 23, 2005, 09:42 PM

The 590 and 835s have open-ended mag tubes and are also available in 9-shot versions. They can be swapped onto your 500 but you will also have to change the barrel, spring and mag tube cap. The mag tube, spring and cap can be had from Brownells for cheap, but the 590 barrel is hard to find. (I did see one on gunbroker.com for $64.)

If you go that route, I think the shortest 590 barrel is 24 inches, which is substantially longer than what you probably have, the 18.5 inch plain barrel.

shooter_john · August 24, 2005, 12:23 AM

You can get the extended tubes and barrels for 500's, but I've only seen a couple of them. (A barrel and tube set sold on ebay a while back, for around $120) The 590 stuff will also fit. I have an 8 shot 590A1 with a 20" barrel and ghost rings. I would think it would be fairly easy to get one of those. If all else fails, contact mossberg, I have always had good luck with their customer service.

shooter_john · August 24, 2005, 01:18 AM

Here you go:http://cgi.ebay.com/Mossberg-500-20-...QQcmdZViewItem

If that doesnt work, just search for Mossberg 500, it should come up.

mtnboomer · August 24, 2005, 03:53 AM

Switch to a 590 barrel and extended magazine tube. The mag tube screws into the receiver.

August 23, 2005, 04:36 PM	#1
DennyB Member Join Date: April 8, 2005 Location: Northern Indiana Posts: 34	Mossberg Shot tube extension? Why cant I find a 7 or 8 shot tube extension for my Mossberg 500A I see Rems and Winchester but not Mossberg? __________________ I love it when a plan comes together !!

August 23, 2005, 04:52 PM	#2
CaCrusin Senior Member Join Date: December 15, 2004 Location: Paso Robles, CA Posts: 115	The Mossberg magazine tube is closed on the end and cannot be extended as that is where the barrel attaches to the mag tube. There is no way to add capacity to a Mossberg 500 other than the Knoxx Sidewinder. This kit converts the 500 to magazine feed and has a 10-round drum magazine that is interchangeable with a 6-round box magazine. __________________ Ca Crusin _________________________ SI VIS PACEM PARA BELLUM _________________________ www.knoxx.com

August 23, 2005, 05:03 PM	#3
rugerdude Senior Member Join Date: July 6, 2004 Location: Tulsa, Oklahoma Posts: 1,443	Yep, the tube is just plain blocked off. The side winder kit looks neat, but if I recall, it costs more than the gun, or at least over 100 bucks. I also don't know about the reliability. However, the 500a is still a great gun. __________________ "The SKS is a rifle, made the way they should be, out of a heavy block of crappy commie steel, set in an inletted semi-reshaped 2x4." Not my quote but I agree completely.

August 24, 2005, 12:23 AM	#5
shooter_john Senior Member Join Date: December 11, 2002 Location: ALABAMA Posts: 1,472	Hi CAP 500 You can get the extended tubes and barrels for 500's, but I've only seen a couple of them. (A barrel and tube set sold on ebay a while back, for around $120) The 590 stuff will also fit. I have an 8 shot 590A1 with a 20" barrel and ghost rings. I would think it would be fairly easy to get one of those. If all else fails, contact mossberg, I have always had good luck with their customer service. __________________ TROTAC.com

August 24, 2005, 01:18 AM	#6
shooter_john Senior Member Join Date: December 11, 2002 Location: ALABAMA Posts: 1,472	Found what your looking for! Here you go:http://cgi.ebay.com/Mossberg-500-20-...QQcmdZViewItem If that doesnt work, just search for Mossberg 500, it should come up. __________________ TROTAC.com

August 23, 2005, 09:42 PM	#4
mikikanazawa Senior Member Join Date: September 26, 2004 Posts: 449	The 590 and 835s have open-ended mag tubes and are also available in 9-shot versions. They can be swapped onto your 500 but you will also have to change the barrel, spring and mag tube cap. The mag tube, spring and cap can be had from Brownells for cheap, but the 590 barrel is hard to find. (I did see one on gunbroker.com for $64.) If you go that route, I think the shortest 590 barrel is 24 inches, which is substantially longer than what you probably have, the 18.5 inch plain barrel.

August 24, 2005, 03:53 AM	#7
mtnboomer Senior Member Join Date: July 9, 2004 Location: Oklahoma by birth. America by the grace of God. Posts: 635	Switch to a 590 barrel and extended magazine tube. The mag tube screws into the receiver. __________________ Quando Omni Flunkus Moritati (If all else fails - play dead!) Support the Second Amendment. Join the NRA > http://www.nra.org < Oklahoma State & Big 12 - #1 GO POKES!!!!!