Cybergun Thompson 1928

If you do decide to swap the front grips, I'd probably buy the vertical fore grip off you, if you don't need it for future projects ...............

When I had a Chinese made 1928 barrel, the M1A1 handguard fitted it ok.

hi there just checked my cybergun thompson and no its not at an angle but the tm thompson fore grips does go in at an angle so you could use one of them . hope that helps m.m

well I just took the cybergun vertical hand grip out. Then I found out the screw is 45 degree angle......... I don't think the thompson M1A1 fore grip screw is 45 degree. Any idea people????

Erm hasnt the M1A1 and the "Typewriter" have very different front ends. If i remember the barrels are very different (on the airsoft guns anyway) and it wont surprise me if you cant fit a standard handgrip on it. Without replacing the barrel set. You can get a cheap(ish) one here http://www.airsoftgunrepair.com/catalog/item/7496781/7884770.htm but after spending that and P&P and possible import duties you gun has just cost quite a bit more. But if someone is willing to part with a spare handguard ( i have one knocking around aswell) i would at least buy one to see what your up against, you never know it might actually fit!

Why do you want to convert? The "typewriter" was used in WW2. I have seen quite a few pics (mostly British troops) of them in action and even Germans using them! (Or at least posing with there captured goods!!)

The angled screw is one problem - the different "grip mount" is another. IIRC, the casting is wider on the Cyma "M1928" barrel set.

Why did you get the 1928-alike if you wanted what looks like an M1A1?

You could just sand the horizontal grip to fit the 1928. It's easily done.

Erm hasnt the M1A1 and the "Typewriter" have very different front ends. If i remember the barrels are very different (on the airsoft guns anyway) and it wont surprise me if you cant fit a standard handgrip on it. Without replacing the barrel set.

The front grip mount on the real M1928, M1928A1 and the M1/M1A1 is identical, a standard part, with both having the angled thread to attach the vertical or horizontal grip. The barrels only differed in the early models having the finned version. Later 1928A1 Thompsons had a plain barrel. The grips are interchangeable between all models. I could put a vertical grip on my Thompson if I was so disposed, but it'd look silly

The front grip mount on the real M1928, M1928A1 and the M1/M1A1 is identical, a standard part, with both having the angled thread to attach the vertical or horizontal grip. The barrels only differed in the early models having the finned version. Later 1928A1 Thompsons had a plain barrel. The grips are interchangeable between all models. I could put a vertical grip on my Thompson if I was so disposed, but it'd look silly

That's real-steel, though. The airsoft ones are sufficiently different that it's not that easy.

Mauri M1A1 Thompsons have the correct angled foregrip screw, so can take both types of hand-guard like the real steel.

CYMA M1A1 Thompsons have a vertical foregrip screw, so you can't fit a vertical (1921/1928 style) foregrip (without a lot of modification).

CYMA "1928" Thompsons... ...I havn't a clue, I'm guessing an angled foregrip screw, so hopefully can take both types of hand-guard like the real steel. Anyone with one able to say for sure?

Entire front ends (barrels and foregrips) are interchangeable between all makes and models (some very minor tweaking may be required)

CYMA "1928" Thompsons... ...I havn't a clue, I'm guessing an angled foregrip screw, so hopefully can take both types of hand-guard like the real steel. Anyone with one able to say for sure?

Here you go.

Screw positions shown by red circles. Real steel (well, wood, actually) on the left, plastic airsoft on the right:-- attachment is not available --That pic also shows the much wider slot on the plastic one compared to the wood. That makes it difficult to fit a real wood one for a start.

Then, there's the angle:-- attachment is not available --You can see the angled posts where the plastic grip's screws go. The real wood one has a steeper angled screw, meaning it would fit the grip mount where the red circle is.

The Cyma "M1928" will not take both fore grips without modification.

Blimey!
I'm so very pleased that I bought the 1928 front end off of Sgt.Heide now, as it imitates the real-steel.
Also, anyone know why the CYMA 1928s have such under-sized Cutts Compensators?

Also, anyone know why the CYMA 1928s have such under-sized Cutts Compensators?

If I recall correctly, the length is right (2.5 inches), but the diameter is wrong (should be 1.188 inches at the wide part and 1.03 inches at the narrow). Why that's the case is anyones guess.
Also, the slots are cut as though they were milled straight across - they should be cut by plunging a 2 inch diameter circular cutter in on the centre line with no sideways movement. This means the bottom of the cut should be curved.

Hmmm, makes you wonder why they went to all the trouble to redesign the front end when the real-steel design is alot less complicated and holds up well.
Thanks ever-so for taking the time to take those photos and post them up here. That's certainly been enlightening

Right back to the subject, from the explaination from No1_sonuk and the photos. Is that meann I need to change the barral totally just for the horizontal grip???

Yup, looks like you'll have to...

Unless I drill a hole.

...and re-enforce the area around the hole and tap a thread into it.

EDITED: for spelling's sake.

I can't say for sure without looking, but the angled threaded holes may make it impossible, not to mention the wider grip mount. Remember that the horizontal fore grip comes up around the lower half of the barrel, as opposed to the vertical grip which is entirely below the barrel.

In reality, it seems to be a far simpler job to fit a real wood vertical grip to an M1A1 front end.

If you'll never want to go back to the plastic vertical mount, you could machine the grip mount to the right shape, drill and reinforce it. If you do this, and make the threaded hole at the right place and angle, you could probably fit a real wood horizontal front end. By extension, if a real wood horizontal one fits without serious modification, a real wood vertical one should also fit.

See the attached drawing of the grip mount.
The datum line carried between the two views is where the front face of the receiver would be.-- attachment is not available --

Cool diagram! Where on earth did you get that!

It looks identical to what is included in the old Mosquito Molds kit.

Cool diagram! Where on earth did you get that!

That would be telling.

It's online, and there are probably enough drawings to build a working Thompson, including the magazines - box AND drum...

Some good photos here:
http://anonymous-generaltopics.blogspot ... e-gun.html

I've also seen one of a couple of Free French soldiers with "Anglicised" (sling swivels on top of butt and side of fore grip) M1928-A1s with horizontal fore grips.