but the fore end is semi-permanently installed
your forearm is held in place by the receiver retaining lip, a tenon on the bottom of the barrel, the outer magazine tube support, and screwed in place left and right side. against the outer barrel tube. it's a chore, but can be done with a few tools and 5 minutes of time.
1. with the rifle upside down, remove these screws and use a mallet to smartly strike the divot between the sling swivel stud and the end of the grip portion to begin the forearm moving towards the muzzle a couple inches.
2. use an armor's bench block or piece of wood or something to support the receiver and the barrel such that the outer magazine tube barrel support can be drifted free from the dovetail in the barrel
from left to right. the dovetail has a very slight taper, do not drift right to left to remove. a sharp blow from a mallet with drift this (it is not brazed or soldered, just held by precision fitting).
3. once drifted, the magazine tube will tilt. from here, use the mallet to tap on the outer magazine tube support to start the magazine tube cap and inner tube forward and out of the rifle.
4. once the inner tube is removed, you must next remove the outer magazine tube retaining screw and the set screw that holds it in place. these are located at the bottom of the receiver, at the base of the magazine tube. they are "stacked" on top of each other. use a long allen key to remove the retaining screw under the set screw.
5. after removing the screws, the magazine tube can be slide foward and out of the receiver and away from the forearm.
6. using a mallet, drift the forearm forward an additional 6 or 7 inches to clear the barrel tenon. replace or perform maintenance as needed. reverse disassembly steps to reinstall parts. during magazine tube installation, torque the retaining screw to 30 inch pounds. the set screw that locks it into place has no torque value but i like to use 30 inch pounds as well, or if you lack a torque bar, "finger tight and a quarter more" works with a dab of thread locker.