The only gun I normally keep loaded and out of the safe is a Remington 870 express with a 26" barrel and 4 round magazine. Not what I would have selected for this role except I bought it several years ago after a burglary. I came home to find a broken window, trashed house and my gun safe intact but smashed up so badly it could not be opened. After the police left I went to Home Depot for plywood to cover the broken window and stopped next door at Bass Pro to buy a shotgun in case the burglars decided to come back and force me to open the safe for them. Sporting shotguns were all the store had. There have been some home invasions in Atlanta recently where 4+ men kick down a door so I want something with more capacity. I mentioned to a friend I was looking at buying a shotgun with a 7 or 8 round magazine and he offered to sell me a TacStar +5 extension for my 870 he bought a few years ago and never used because the tube extended too far beyond the muzzle of his gun. How reliable are these big extensions? I have never heard of anyone having problems with smaller extensions but am a little worried one this big might be like big drum magazines for rifles, fun to play with at the range but not the 100% reliable magazine you want for self defense.