GUARDER Steel CNC Slide for Marui G17 Gen4 GBB Airsoft

It is easy to assemble. Loosen the screw, remove the parts, insert the parts into the new slide, and tighten the screws again.
At first, the movement was slightly rough, but when a little lubricant was applied, it moved smoothly immediately. However, I slightly ground the part in contact with the blowback unit. This is because a frictional sound was heard at that part. Then, of course, the movement became smoother and quieter.
When equipped with this product, the movement is unnatural with the basic spring of TM and sometimes does not become the return of the slide. In order to operate smoothly, it is recommended to replace the recoil spring with a product with at least 120% tension.
I live in Korea, where the temperature is relatively low. Therefore, my experience may be different from others. In other words, it will be different from that of Taiwan and Hong Kong, which are relatively warm.

It is cheaper than steel products.
But the quality is good.
There is no need to trim it separately.
It worked smoothly and well after applying lubricant.