This is the updated guide to all the attachments for NERF N-Strike and N-Strike Elite Tactical Rails. This is current now as of 12/27/13.
First I'll start with the Shield that is included with the N-Strike Stampede ECS. It fits most (not all) blaster shapes. This could be very useful in a war but it is small so you can't really hide behind it.
Grip/Folding Bipod is only good for blasters with a bottom-facing tactical rail and comes with the N-Strike Stampede ECS. This is useful for the longer blasters like the Longstrike, Recon, or any other blaster with a downward-facing tactical rail.
This is a older attachment that
remotely fires the foam disks from the Nerf Disk Shooter set. It has a button on the back and uses 2 AAA batteries. Other than for being used with that set, there's no other use for this.
This is a flip-up sight that is included with the N-Strike Longstrike CS-6. The front and rear sights can folded down to be used as ironsights. Quite small and lightweight. It doesn't really work.
This Flip-Up sight comes with the N-Strike Recon CS-6 and is also available in Red and Clear. It's very small and lightweight. The orange piece is adjustable with where it sits on the sight and is designed to work in tandem with a barrel extension that has a flip-up point to complete the trajectory. You're supposed to be able to angle your shots with this device, but it's not very accurate.
This dart holder comes with the N-Strike Barrel Break IX-2. Holds 8 darts in a row and is one of the more useful accessories. Also comes with the Sonic Series version.
The N-Strike Longshot CS-6 scope is probably the most popular accessories and can also be found in Blue or Red. Don't let it's looks fool you. There's no magnification on this and it's pretty useless to look through.
This scope, available in red or blue, can be found with the Super Soaker Shotblast Value pack. Looks neat, but useless.
Nerf Mission Kit Tactical Scope. Also available in a Toys R Us exclusive set. Claims to add accuracy, but like the others, it's pretty useless. It does have a yellow transparent cover that can fold over the front and also has it's own Tactical Rail on top to mount other accessories. Accessories on accessories is a "tall" order.
Nerf Mission Kit Pinpoint Sight. One of the more sought-after accessories, it's still not very accurate. More for looks than anything.
Nerf Mission Kit Tactical Light. Runs off AAA batteries and has a green light. A bit bulky, but works well as a torch.
This Tactical lLight comes with the Nerf Recon CS-6 and is available in Yellow, Red, and Clear. This battery operated light is adjustable from red light to red pin point. The light is cool but the pinpoint is not accurate.
Last we have the Nerf Crossfire / Strikefire. With it's clips in the top of the gun it can be attached to any blaster with a tactical rail. Very useful.