This is a Custom Arcus Regime style Nerf Longstrike CS-6 conversion! This blaster started as a Nerf Longstrike CS-6 but that's where it ended, this was completely refinished with 4 coats of paint along with a matte finish to protect the finished paint. This prop was Custom painted Brushed metal, weathered detail for a more heavy metal realistic. Get the best deals for nerf gun longstrike cs-6 at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!. So i recently bought a longstrike cs6 (second hand so yeah doesn't shoot that far) and i want to mod it so it's more sniper-like. I also want to spray Paint it black/dark green. But how 'heavy' should The spring be to shoot around 25-30 meters, ( that's around 60-70 feet) should i buy a 5kg spring? maybe 7 or even 14 kg ?.