"GUNPRIMER" is a brand that specifically develops and manufactures products related to plastic models. However, there are mixed opinions about the legitimacy of their products. Some users have expressed concerns, stating that the "Gunprimer Raser Series" is overpriced and comparable to a regular glass nail file that can be purchased for much less. On the other hand, some users have defended the brand, stating that while the products may be expensive, they are not a scam and can provide slightly better results than cheaper alternatives. Therefore, it's recommended to do thorough research and consider these points before making a purchase.