This front sight is designed for the Cyma M870 full length (CM.350L). It consists of two clamps that clamp around the barrel and magazine tube, held together by a bolt and a nut.
This product page is about the left clamp. Make sure you also have a right clamp, which is a seperate product.
The following options are available:
- Left side clamp with front sight
- Left side clamp with front sight and MIL-STD-1913 4 slot section
- Right side clamp
- Right side clamp with MIL-STD-1913 4 slot section
Furthermore, there is an M870 heat shield available. In case you wish to install this as well, make sure to install it first, as you have to slide it on the barrel. If you have already installed the front sight, it will prevent you from sliding the heat shield on. For more information regarding the heat shield, please refer to the heat shield product page.
The rail sections are designed after the metric dimensions for picatinny rail and various attachments have been succesfully mounted to ensure the dimensions are correct.
For the installation of the left and right clamp, an M5x20 bolt and M5 hex nut are required.
- (Optional step): The left clamp features two protrusions that fit in two holes in the right clamp. This might be a very tight fit, so you may want to wear these protrusions in a bit before installing the clamps. This can be done by putting the first protrusion in the second hole and turning the clamps a bit. Keep turning the clamps until the protrusion has worn in a little bit, then repeat this for the second protrusion in the first hole. This step can be skipped, but removing the two clamps from each other might be more difficult then.
- Step 1: Slide the left clamp over the barrel and magazine tube. Make sure the front sight sits flush with the end of the barrel.
- Step 2: Insert the M5 hex nut into the recess in the right clamp. The recess is already hexagonally shaped, so the hex nut cannot rotate when inserted.
- Step 3: Slide the right clamp over the barrel until it sits at the same level as the left clamp.
- Step 4: Insert the M5x20 bolt in the left clamp and turn it in the nut.
- Step 5: Check for any movement in the two clamps. If they are still moveable, tighten the bolt.
When the front sight has been succesfully installed, there should be a bit of space between the top and/or bottom of the magazine tube and the clamp. This is to make sure the clamp doesn't push/pull on the magazine tube.
The front sight also features a small notch. This can be filled with paint to make aiming easier, if you prefer.
Additional pictures will be added later.