Does anyone know what size the 2 screws are that go into the underside of the barrel assembly, into the receiver? (NOT the grub screw in the top)
Somehow, I lost both of them in my gun last time it was skirmished, and I didn't find out until I took it apart to clean it. 
have a feeling they are M5? ask Headshot, as he makes a repair kit for thompsons which include fittings
Doc Mac
Can't be M5 - Wouldn't go through the holes.
Is it the screws from the flat plate ( that the foregrip bolts too) under the barrel? Will have a look at one of our cymas tomorrow
Yes - the ones that hold that plate to the receiver.
I had to completely re build a Cyma Thomo recently, I seem to remember the screws that hold the barrel to the underside of the receiver are M4....
nice one Aitch, will save me stripping one of ours! 
K, tnx.
I supplied Harborne Blue with some replacements a couple of years back. They're definately M4. The TM uses 16mm long 'uns, and the CYMA uses 20mm long 'uns. The TM Thompsons usually accept 20mm long 'uns too. I can supply replacements (blacked too!, not zinc) purely for the cost of postage. PM me if anyone needs any.
PS: The sling swivel screws are the same, but only 13mm long.
A Proud Member Of 'Team Spleen!' who play mainly at Gunman Airsoft, Tuddenham, Suffolk.
