craig1982 Posted March 28, 2020 Report Share Posted March 28, 2020 I have a Beretta 303 semi auto which gets very little use, I took it out the other day and it does not cycle 100% even on 32g cartridges. I want to give it a total clean up. What do people use to remove the carbon from the piston, cylinder and gas port. The cylinder is very grimy, what will dissolve the crud ? Quote Link to comment Share on other sites More sharing options...
wishy735 Posted March 28, 2020 Report Share Posted March 28, 2020 Bore cleaner and an old toothbrush will clean the piston. For the gas port's I have a small screwdriver that I have ground so it has two flats and is tapered. First time you do it you will be surprised how much carbon comes out. I have a 302 that will cycle 24 gems no problems. It's always the gas ports that are the problem. Quote Link to comment Share on other sites More sharing options...
Westley Posted March 28, 2020 Report Share Posted March 28, 2020 I recently bought a 301 'scrapper' that was sold for parts. When I stripped it, it was filthy. I used GT85 and a brass brush to clean the piston. The rod that the piston fits on I cleaned with a nylon pan scrub and again GT85. I then soaked the piston housing on the barrel with the same fluid and left it whilst I had a coffee. I then used an old screwdriver to get most of the carbon off and then a wire coat hanger to clean the barrel ports. I removed the stock and then the recoil spring fitted inside the stock tube. I replaced that spring with a new one. Just a point, IF you should change that spring it is NOT the same as the recoil spring in a 390/1 onwards. So watch out for that. The gun had a damaged piston and a couple of parts missing off the trigger unit. I replaced the missing parts and put in the bolt from my 303. The gun functioned perfectly including 24 grams. Just need to locate the upper portion of the bolt now. I use GT85 for cleaning all of my guns and has never been a problem and at £3 a can is a cheaper option. It is NOT a lubricant though. Quote Link to comment Share on other sites More sharing options...
strimmer_13 Posted March 28, 2020 Report Share Posted March 28, 2020 In my semis, brake cleaner or carb cleaner then a bloody good scrub and a light drop of oil (nothing special, just some stuff my mate nicked out the stores in the navy years ago) Quote Link to comment Share on other sites More sharing options...
Velocette Posted March 28, 2020 Report Share Posted March 28, 2020 2 minutes ago, Westley said: I recently bought a 301 'scrapper' that was sold for parts. When I stripped it, it was filthy. I used GT85 and a brass brush to clean the piston. The rod that the piston fits on I cleaned with a nylon pan scrub and again GT85. I then soaked the piston housing on the barrel with the same fluid and left it whilst I had a coffee. I then used an old screwdriver to get most of the carbon off and then a wire coat hanger to clean the barrel ports. I removed the stock and then the recoil spring fitted inside the stock tube. I replaced that spring with a new one. Just a point, IF you should change that spring it is NOT the same as the recoil spring in a 390/1 onwards. So watch out for that. The gun had a damaged piston and a couple of parts missing off the trigger unit. I replaced the missing parts and put in the bolt from my 303. The gun functioned perfectly including 24 grams. Just need to locate the upper portion of the bolt now. I use GT85 for cleaning all of my guns and has never been a problem and at £3 a can is a cheaper option. It is NOT a lubricant though. if its the bolt locking piece you want I have a spare one here you can have. Its the roughly "L" shaped part on the top. PM me an address and I'll pop it in the post asap. Quote Link to comment Share on other sites More sharing options...
craig1982 Posted March 28, 2020 Author Report Share Posted March 28, 2020 Many thanks guy's. Looks like some good old elbow grease required. Quote Link to comment Share on other sites More sharing options...
Wingman Posted March 29, 2020 Report Share Posted March 29, 2020 (edited) If like mine there's a slight looseness of the trigger group when the gun is assembled I found a small 1 inch square piece of duct tape fixed to the inside of the receiver resolved it. I don't know whether that's a problem with only the 302 which mine is as the magazine cutoff is the main trigger group pin but if yours is the same it works! Also made a shim for a slight bit of play in the forend and that's sorted now as well. Edited March 29, 2020 by Wingman Quote Link to comment Share on other sites More sharing options...
mossy835 Posted March 29, 2020 Report Share Posted March 29, 2020 i have a armsanA612,and it with throw out any thing i put in it, not been cleaned for over a year,just to see when it will not throw out carts, its still going with no jams. Quote Link to comment Share on other sites More sharing options...
sishyplops Posted March 30, 2020 Report Share Posted March 30, 2020 (edited) I put mine in an ultrasonic cleaner , sane with ported chokes Edited March 30, 2020 by sishyplops Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.