I have posted most of this in various threads but I am going to post it all on one thread so people can see what I did based on my experiences in 7 Tactical Shotgun Classes at Front Sight and shooting Local 3 Gun Shoots with these 3 Mossberg 500's. Everything is directly applicable to M590's and 590 A1's, and most of it will work on Rem 870's and others as well.
The first two classes were brutal, and I came home beat up pretty bad. I'm talkin' Seriously Bruised Shoulder and on the Second 4 day course the whole right side of my face was black when I got home. I then figured out how to keep my cheek weld on the gun, as every time I didn't, I got smacked in the chops.
By the Third Class I had the gun pretty much sussed out and had a Decent Idea of what to do with it. This was with the 20" M500 my first Tac Shotgun.
This stuff works and was arrived at by Trial and Error from both the classes and local 3 gun shoots. It could save you a lot of bruises.
The guns are a 20" Tactical M500 7+1 and a 18.5" HD M500 5+1. Both guns are set up exactly the same way except the HD gun doesn't ordinarily have a sling attached, but it does have the capability.
Both guns have Open Rifle Sights and I like the Green Williams Fiber Optic Front Sights because in the sunlight they are impossible to miss. At night with a light on the gun they are also impossible to miss. Unfortunately the Front Sight on the Barrel of the HD gun is solid, and I haven't figured out a way to install one on it yet. I have them on Rifles, Pistols and 3 Shotguns.
Both guns have Brownell's High Ridge Safeties installed and they were dehorned as using them in their stock form would result in Bloody Thumbs. One significant advantage of the Mossberg platform over others is the placement of the safety which makes the gun Ambidextrous.
Both guns have Magpul Furniture Black on one and Gray on the other, and both guns have the Magpul to Remington Recoil Pad Adapters and Pads. These pads are much larger and squishier than the pad that comes with the Magpul stocks. Also to insure a more squared up stance to the target all the Stock Spacers are absent. LOP is 12.5". I am 5'11" These stocks and Fore ends have the best Ergonomics for operating a shotgun I have seen, and are well worth the $100 or so bucks. They are easy to install and adjust to your body type.
Both guns have been completely internally deburred and run very smooth. Can't really show that, but trust me, they run slick.
Continued on next Post.
Randy