I AM LOOKING FOR AN ELECTRIC ROOFING NAIL GUN, DO YOU CARRY AND WHAT BRAND NAME AT WHAT PRICE?

A roofing nail is designed to be easier to be removed, they have a smooth shank and wide head that hold down shingles. A siding nail has a ring shank. A roofing nailer is used to quickly pin down shingles across a roof, the depth at which they are drive in is generally shallower than a siding nail.
You can read a little more about roofing nailers here Best Roofing Nailer Shooting From the Hip Woodworking Tool Guide.

Some trigger valves (tva6) are sensitive (defective?) however there are some things you can try to change how the gun acts. I have noticed that the brand of oil has an effect on the orings. Some brands will swell the orings, I like Paslode nail gun oil. Do not wash the gun with gasoline or wd40. Use diesel. Change the nail depth setting one position. Lowering the air pressure will make a difference. I find that most operators use too much pressure. A stronger safety spring under the trigger will separate the trigger and firing pin quicker. Finally you could use single fire trigger. Good luck

No that model only takes framing nails.

Nailers that use strips of nails (one nail directly behind the other) will sometimes drive two nails at once and is caused by damage to the driver. The nails are so close together that the driver will hit the first and part of the second nail head. Coil nailers, as your an451, use nails seperated by welded wire making it very difficult the the driver to hit the second nail. Usually when a coil nailer shoots two nails, it is acutally the trigger valve that acutates twice (two very rapid fires). Two very rapid fires is caused by faulty trigger valve. I have seen a roofing coil nailer fire one nail and a second nail drops out of the gun. Caused by weak / malfunction of nail feeder or wire used to weld nails together is too thick.

Yes. Roofing nailers all use about the same size and spacing on coil nails. You will find that Harbor Freight is about 1/2 the price of Home Depot or Lowes for those nails.
-Jim

Here are a few tips on buying nails for your nailer. Nails are sold in two basic categories, clip head and full round head. The clip head are lower in price and are usually taped on glued together with no spacing between them. The full round head have spacing between each nail and are held together with plastic. Some nailguns can use both types. It is important to verify the angle of your gun. To measure the exact angle use a straitedge along length of rails and a protractor at the barrel of the gun. Place the protractor on the barrel with the 90 and 0 degrees aligned with the barrel and hold the straitedge aligned with the rails and the 0 degree mark. Read the angle. You may find that your gun measures a different angle. Nails are sold from 0 to 34 degree. 34 degree is usually clip head for Paslode, Senco, Hitachi and other brands. I find that many brands of nails do not list the angle, but list the name of the gun instead. This makes it difficult for non-branded guns. Take the protractor into the store and measure the angle of the nails or place the nails on the outside of the rails to see if they align with the barrel. Shop several stores because nails vary by brand. Once you verify the perfect fit, ask for a sample strip to try in your gun. When you identify the angle and type, use this information to shop for price. Most nails are imported from around the world, however there are nails still produced in the US costing more. Home Depot and Lowes do not carry a full range of nails.
=Google the internet for more info on nails such as www.nailzone.com. They sell a 33 degree nail that may fit your gun. Good luck and email me or post again with more questions.
w

I think you'll have to look at your specs on your nail guns and see what the demand is . Whether measured in cfpm or psi, your compressor will tell you the max output of each of those. Then you divide the maximum sustained output of the compressor,, lets say it is 60 psi. Let's say the guns require 10 psi, 60 divided by 10 is 6 = 6 nail guns. This is completely hypothetical as I have no idea what your nail guns require, only you know what kind of guns you have.If you need to run more guns than the compressor can push air for, you'll have to invest in another compressor, maybe even one larger to handle the guns running wide open consistent nailing. Nothing a drywaller hates more is than for all the cursed clip nails not being drove in all the way, lol, and that's what will happen with insufficient air supply.
Matt

A good-quality starter set, including both a compressor and a small nail gun, can be bought for around 200 US dollars (USD). More sophisticated models can reach 1000 USD or more. Optional features such as a hard-shell case, safety trigger, and depth adjustment can drive the price even higher. For one-time jobs, a nail gun can also be rented at hardware stores and home repair centers.

The real different between nail gun's models are the sort of power supply they use. A nail gun can be powered by compressed air, electricity or batteries, or electromagnetism. Some small guns are powered by butane, a fuel that causes a small explosive charge to drive the nail into the wood. The most common type of nail gun is the pneumatic nailer, which works with compressed air.