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AR-15 Scope on an MP5

Learn how to build SG-1's MP5 scope

AR15 carry handle scope

What you'll need:

SG1Props.com recommends the use of proper eye protection and respirator/dust mask equipment whenever working on props. This site will not be held liable for injuries resulting from following these tutorials.

Eye protection:

Lenses should be made from polycarbonate to protect from flying debris.

Respirator:

Completely cover mouth and nose, and fit the form of your face. A mask with interchangeable P100 particulate filters is recommended for this project.

About

On the show Stargate SG-1, MP5's are issued to offworld personnel with an assortment of tactical accessories. Most distinguishable is the AR-15 carry handle scope. This scope was designed to be attached to the small hole in the carry handle of AR-15 (M16 etc.) rifles. For the series, however, it has been attached to a claw style mounting system (which is normally used to attach rail bases scopes to weapons with the H&K tube style receiver).

This guide will show you, fellow Stargate prop builder, how to mount one of these scopes to prepare for your offworld mission!

For questions and support visit the support forums

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Scope it out

Scope for the SG-1 MP5    Remove the lower wing nut assembly by unscrewing it

With the scope in hand, remove the wing nut on the bottom that secures the scope to an AR series carry handle. With this removed you will have a bare screw protruding from the bottom of the scope's base—the basis for how we will be attaching it to the claw mount. Take the part you've just removed and set it aside because you will be making use of some of the parts from it. Next though, using your phillips head screwdriver, you'll want to remove the 4 screws on the sides of the the scope (two per side), and put them someplace safe. With those removed you will be able to remove the base from the scope, leaving you with two parts: the scope tube, and it's base.

AR15 scope disassambly    Pop off the washer to take apart the wing nut assembly
AR15 wing nut asambly disassambled    You will only need to keep the threaded nut for reuse
Disassambleing the AR15 scope    Unscrew the base of the scope by removing the four screws

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The grind

Putting an AR15 scope on the Stargate SG-1 MP5-A5    We will use the circular nut to hold the scope to the claw mount

At this point you can either buy a new bolt/nut that's relatively the size of the one on the scope base, or you can make use of the one that comes with the scope. For our purposes here I'll be showing you how to use the one that came with it. In general though, if you opt to buy a new bolt, you will need to get a nut that will fit in the channel on the claw mount (below the rail). You'll have to experiment with what works if you want to use a new bolt and or nut.

Putting an AR15 scope on the Stargate SG-1 MP5-A5    Unscrew the small side screw inorder to pull out the bigger screw - save both!

To remove the bolt from the scope's base, you will need to untighten the tiny flat head screw from the side (see photo). After that is loosened you will be able to remove the bolt by pushing it up from the bottom, and out of the base. The head of this bolt is square shaped to prevent it from turning; but, we want to file it down to a semi circular shape so that it can turn in the channel. Also, you will have to cut a notch into the top of it so that you can turn it with a flat head screw driver. A bench grinder works best for reshaping the screw head into a circle, however you could also use a metal file.

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Wormhole

Building the Stargate MP5 scope    Choose where you want to mount the scope on the claw mount

The next step in this modification is to determine where you want the scope placed on the mount. What I did was look at some reference photos with the scope and mount in front of me. If you move the scope (and it's base!) along the claw mount you can either pick what looks closest to what was done on screen, or what you like best. At this point, mark the top of the claw mount exactly where the screw from the scope touches it. This is where you will be drilling a hole.

Building the Stargate MP5 scope    Once you find where you want it, mark the claw mount through the hole

Once you decide if you want to use the bolt you have or to buy a new one, it will be time to drill a hole into the claw mount. It's very important to drill your hole in the center of the channel so that the scope stands up straight. If you drill closer to one side then the scope will not sit evenly, and will lean to one side. With this in mind it's a good idea to drill a smaller pilot hole before using the larger drill bit (can ya tell I made this mistake!?).

Drilling a hole on the HK claw mount    Drill a hole just big enough for the screw to fit through into the channel

Next you need to make sure that the nut you're going to use will fit into the channel inside of the claw mount. If you're using the circular nut that came with the scope then you will need to either saw off or grind down two sides of it so that it can slide into the channel. The threaded hole needs to line up with the hole you drilled though, so make sure you cut/grind both sides of the nut equally. The nut should fit into the channel but not turn.

 

Combining the AR15 scope with the MP5 scope mount    This nut must be fitted into the channel of the scope mount
Cutting the AR15 nut    Trim off enough, but don't damage the threads
Nut fitted to the claw mount    This is how the nut should look when you're done cutting it
Tighten the AR15 scope onto the HK mount    Example of the nut from the AR15 scope inside of the claw mount

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Line them up

Screw the AR15 base to the HK scope mount    Tighten it up until the scope base is held firmly
HK claw mount with AR15 scope frame    Secure tightly so that the scope base does not move

Once the nut is fitted securely inside of the claw mount it's time to secure the base of the scope. With the base of the scope sitting ontop of the claw mount, line up the hole of the scope housing with the hole that you drilled on the claw mount. Once it's lined up, screw the bolt into the scope housing, through the hole you drilled in the claw mount, and into the nut. Since the nut cannot turn inside of the claw mount, you will be able to screw the bolt in tightly. If you used the original bolt that came with the scope then you will be able to put back the tiny screw that you took out of the side of the scope housing. This will make sure the bolt doesn't come loose.

You can now place the scope tube ontop of its housing, and screw it down with the four screws you removed earlier. If everything went right then congratulations; you're done! If the scope isn't straight, or seems to wobble a bit, then you might have to go back and rework the hole you drilled in the claw mount. Otherwise, your Stargate SG-1 issue MP5-A5 is ready for you to take aim with on your next offworld mission!

AR15 carry handle scope    Remount the scope tube by rescrewing the 4 side screws
Stargate SG-1 MP5    Finished MP5 with the AR15 carry handle scope installed
Custom scope on MP5-A5    Take aim and go get some Jaffa!


To discuss this tutorial visit the support forums

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