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Nerf M4 Carbine Recon by Gavinlimkj on DeviantArt
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Nerf Stryfe M4 like barrel by achmed20 - Thingiverse
Motorized Dart Blaster M4A1 Realistic Toy Gun Automatic For Nerf Elite Bullets 706243119515 | eBay
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Worker Mod DIY Imitation M4 Kits Combo 13 Items for Nerf Stryfe Modify Toy | BlasterMOD