mine doesn't have a screw holding it on

Route_50
Member Crosman Airgun Forum

1 - Please know that the front signt ramp is molded as a single unit with an inner barrel bushing.
This bushing MUST be kept intact because it holds the actual rifled barrel in place within the outer sleeve.
2 - The entire unit can be slipped out - toward the barrel end (inner bushing and ramp as one), however if you are removing the ramp for good (and I mean for good), for a muzzle break or something, I would cut it off while mounted on the gun.
3 - Place the rifle barrel down on a soft block of wood.
4 - The lower end of the ramp slips over the outer barrel sleeve so you can start with a thin hacksaw blade between it and the sleeve.
5 - Saw down and through the ramp with the blade running down the metal sleeve (for a clean cut). You may scratch the metal a little, but your muzzle break will cover it.
6 - By doing this, you cleanly remove the front ramp and keep the inner barrel alignment bushing intact.
I have a Beeman Universal Muzzle Break on one of my 1077's. Some say ugly. I say sweet. Fits like a glove.
If you have an Air Source adapter installed, the ribbing on the adapter approximates the Beeman break. Very classy.
Regards;
Mike

I just dremeled off the sight, leaving the plastic rounded to match the contour of the 'barrel'. A while back I had glued it permanently in place to tighten up the accuracy on the gun.

I used a pair of vice grips once to remove it and another time I disassembled the gun and pushed it out with a long wood dowel from the other end of the outter barrel shroud.