Grotty picture - you should get some lens cleaner for your camera.

Late production M1928A1s had unfinned barrels the same as M1s and M1A1s, but with threaded muzzles for the compensator. Both are shown on the drawing...

the way AZR did the cutts compensator, was to cut a slot in the top, and have it fit over the M1a1's existing front blade sight, and use a grub screw ...

You asked about AGM guns, and those links are for AGM guns...

I have an M100 spare from trying to get my Cyma below 328 for local site - it stayed around 360. 1J did the trick, though. Besides, I'm not wanting i...

Did you try google? Result from google search for AGM MP40 barrel length:

I've just ordered one - I'll let you know. I have a cunning plan.........

I'd be interested to know if the upper/barrel assembly fits on a TM/Cyma.

Bit of a crazy angle on that bolt handle!

Very nice indeed.

Yeah, that's what I was puzzled about. The BB wouldn't allow enough pressure to build up behind it.

My stock Cyma's ROF is about 600rpm on 8.4V, which is realistic for an M1A1. Your friend's is probably modded (even a lighter main spring would help ...

Would an M1A1-fittable Cutts be something people would be interested in? yup OK. I'll have a go at making one.

The photos look a lot like the construction of my Cyma M1A1, including the hop, and the 2 pieces screwed on either side at the front of the receiver. ...

If they are TM-compatible, and the hop unit, too, I forsee many sales for stripping for spares.

I've looked into that, and the part that's milled flat for the blade sight would need to be milled through. Would an M1A1-fittable Cutts be something...

When I got my M1A1 I didn't even think of charging the supplied battery.

In my "Front end thread", I've realised that I've given no idea of the size of this part. So here goes. That's the muzzle of my M1A1:-- at...