This mount is designed for 30 mm scopes. The scope will be slightly elevated from the rail with this mount, therefore targeting with e.g. M4 series guns is easier, and the front sight will not get in the reticle’s way!
The 30 mm mount fits smaller devices when you add sufficient padding between the tube and the mount.
Origin of the product:
This product has been manufactured in China and doesn’t really have a brand (ACM = All China Made). Because of this, the price is lower than that of better-known manufacturers. Please note that the lower price in ACM products can also affect the product’s manufacturing material, finishing and life span compared to more expensive brands. In short, make sure to browse through all the different options without any hurry before making the final decision to purchase the product.