(Above) Light weight shelf is available at Lowe's building supply for less than $20 ! Perfect height for mounting targets !
(Above) Practicing the IDPA Classifier indoors with Tactrainers Targets
Targets can be mounted on individual stands for quick placement and relocation as shown above in a facility in Canada
A dedicated area with permanent backstop makes a really nice home set-up
(Above) this recreational facility in Aruba uses standard shelves for their public indoor airsoft range
(Above) An outdoor shelf set-up with PVC stands supporting a portable shelf
(Above) A permanent backstop and shelf indoor set-up with double-deck shelving
(Shown below are some Tactrainers clients' set-ups.)
If you attach the shelves permanently, it's a good idea to put a sheet with a little air space behind the shelves to minimize the travel of the BB's that don't hit the targets, best to use a light solid color.
On the shelves themselves, it's a good idea to pre-drill each shelf with starter-holes for self-tapping screws about every 2 inches, then circle each screw hole with a marking pen so you can easily find a hole to re-locate targets anytime you want to change the configuration of your target array.
You need a good airsoft gun. The guns that work best are gas blowback guns...electric or spring guns are better than nothing, but won't give you any kind of recoil or muzzle flip so there isn't as much training value in using them. When you buy an airsoft gun, it's best to get a quality full sized Gas Blowback (GBB) model of a popular gun. Adjustable sights are a real plus in case the point of impact changes as the gun wears or you use different styles of BB's. Generally you can get a decent gun for $100 to $150 and a really nice gun for $200 to $250. Even the cheap "disposable" airsoft guns provide trigger time that you wouldn't get otherwise but Gas Blowback guns give the best power and reliability by far.
In cold weather the Co2 guns will keep working when green gas fails, but the best performance by far is a green gas blowback gun converted to run on compressed air. Running on compressed air, a green gas blowback gun will work the same in freezing temps as it does on a hot day. The power is always the same from the first shot to the last shot and there's no more buying Co2 cartridges or green gas. Tactrainers has conversion kits for your magazine so you you can start running your existing gun on air (green gas guns).