How do you disassemble a Remington Model 51 380?

Answer 1

Please don't rotate the barrel. I cant tell you the number of times that I've seen beautiful old Remington 51's buggered by trying to disassemble them like a Colt or FN.

I'm just sniping the disassemble part

Disassembly:

1. Remove the magazine.
2. Cock the gun (make sure the chamber is empty).
3. Hold the slide back about one-quarter inch to align the half-moon cutout on the left side of the slide with the barrel pin. Poke the end of the barrel pin on the right side, to raise the head of the pin on the left side. Remove the pin with a small screwdriver or the toe of the magazine base plate.
4. Pull the slide back about three-quarters of an inch and grasp the end of the barrel (which has serrations to assist gripping it). Depress the grip safety and pull the slide and barrel assembly off the receiver.
5. Pull the barrel forward about a half-inch against the tension of the recoil spring and tilt the barrel lug toward the left, locking the barrel into a recess in the slide.
6. Press the moveable breech block backward against the tension of the firing pin spring and lift up at its rear (you may need something to pry it up). With the rear of the block lifted up, you can move the breech block forward and remove it from the slide. (The extractor may fall out on the .32 models--there is no spring.)
7. Tip the slide so the firing pin and its spring can drop out the end of the barrel.
8. Pull the barrel forward against the tension of the recoil spring. You will see there is a recess in the slide that is the exact size of the recoil spring bushing. Tilt the barrel up and catch the bushing against the rear of this recess, then slide the barrel backward and lift it up and out of the slide, followed by the bushing and recoil spring. You may have to pull the bushing back toward the front of the slide a little to free it.

Assembly:

1. Insert the recoil spring and bushing into the slide and tilt the bushing up a little so it catches on the slide recess.
2. Insert the barrel and push it toward the front of the slide, compressing the recoil spring and bushing, and snap it into place in the slide. (You may have to compress the spring and bushing by hand to get them to snap into place.)
3. Pull the barrel forward about a half-inch against the tension of the recoil spring and tilt the barrel lug toward the left, locking the barrel into its recess in the slide.
4. Insert the firing pin and spring into the fixed part of the breech that is attached to the slide.
5. Hook the fore part of the moveable breech block over the front of the firing pin spring and pull it backward and down at the rear until it snaps into place in the slide.
6. Unhook the barrel from its recess, slide it back against the breech block, and make sure the barrel lug is centered properly.
7. Align the slide on the forward end of the receiver and install it on its rails. Push it back until it is stopped by the disconnector, which projects upward just behind the magazine well. You may encounter some resistance, but this is normal. You may have to depress the ejector to get it out of the way.
8. Depress the grip safety, push the disconnector down, and press the slide back until it locks onto the receiver.
9. Hold the slide back about one-quarter inch to align the half-moon cutout on the left side of the slide with the hole in the receiver and insert the pin that holds the barrel in place.
10. Replace the magazine.

AnswerSimilar to the Colt 1903 series. When you pull the slide back slightly you will be able to rotate the barrel to unlock it.

Disassembly is actually pretty complicated. I suggest you purchase one of the reproduction factory owners manuals.