So hello. Ratmonkey(Alex) here. I will be posting once again in a long time. I will be trying to attempt a 100% or all most perfect prop of a Halo 5 magnum out of Extruded Polystyrene or project foam. I will be posting steps. And everything i use here on this thread. Kind of a full detailed thread. I will post pic in a little of all my tools, material, costs( for anything more then 5 to 10 bucks) and where i got them. Okay here we go. Everything on this pic. You will need to get the best out of the prop. (Before paint.) X-acto knives:#11 and a thin blade with a small edge to get super small detail, but is also achieved with a regular 11. I usually get the z series. The blades are coated in zirconium nitride. they last longer in my opinion. - Cheapest place to buy: Walmart, Joanns, or Micheals Snap off knifes: i buy the good metal holders for the blades.( i've snapped the cheap plastic ones. the cuts hurt btw.) A small 9 mm. and a big 18 mm for rough cuts. and buy some replacement blades too. -Cheapest place to buy: Walmart for blades. Home-depot for metal holders. (Not in the PIC) But get a sharpener. A kitchen or knife sharpener. Usually one with both a course and fine side. A metal ruler(metric/standard) or for others(centimeters/Inches): Walmart is the best for these Sharpies: Cheapest is Walmart, but can find these at Dollar Tree/ Family Dollar/ General Dollar/depends where you live. Pens: What ever color you want: Dollar tree/ 99 cent stores Sandpaper:220 grit and 400/600 grit. I buy big square sheets. Cheapest at: Walmart and Home-depot Sanding sticks. I make my own. Just use Popsicle/Craft-stick sticks. jumbo. small. the small ones i glue them together to get different thicknesses. and then glue 220 grit on them. They last a very long time. mostly used for rough carving/Shaping. I get the craft sticks from Walmart. And a good pair of scissors. And our foam. here is the link: Project Panels FOAMULAR 1 in. x 2 ft. x 2 ft. R-5 Insulation Sheathing-PP1 - The Home Depot I live in California. San Diego county. So finding Extruted polystrene is kinda a pain. So this is all i ever found driving and contacting companies. This is literally it. Ordering it online is almost 100 bucks for 2 4ftx8ft boards. Not really worth it if u don't have that much money. And each board would cost 20 bucks. So i use these. 2ftx2ft boards. And last put not least. A high temp hot glue gun and glue stick. I use the mini ones since it easier for small props. Or smaller details. best place is Joanns. If you sign up for their coupons you should get a 50% off a single item. Or they usually have coupons. They usually have a 50% off a single item on their ads. The hot-glue guns are between 6 to 15 dollars. Depends on brand and quality. And a 100 pack costs about $6.25 after taxes.