Help ID flash hiders

Top one looks like a Poly Tech National Match device. The bottom looks like a variation of the Norinco 84S device.

PM sent

bottom one is a Romanian PM90. the short barrel version. I'm looking for one if your interested in selling it.

Polytech NHM..I think it was nicknamed the "Bazooka" or some such, back in the day.
Bottom is PM Md90. Not sure if its a clone or not. They do exist.
Original ones are pretty desirable.

Not to be disagreeable, but I believe the bottom is a chinese hider....Ive never seen a PM90 that had bluing that nice, that looks more like a polished chinese bluing rather than the more matte dull finish I typically see on romanian stuff. Ive got an OG romanian MD90 device and its considerably rougher than that. To me, it looks more like the 84s hider, perhaps an aftermarket import brought in for the US market. The top one is definitely a polytech hider. Ill look through my old Kengs catalog tonite and see if I can find any more out for you.

Chinese 84S flashhiders were not cast (You can see the line down the middle of the part). The profile is also completely wrong. I think its a reproduction of a 5.45 AIMR flashhider.

The part you are citing is a the 7.62 version which has a shorter cage. The 5.45 version is longer and is much closer to what the OP posted.

Bullitt0088 said:

View attachment 358881

Here is an example of a repro part.

Click to expand...

that would be a Romanian AIMS74 "Commando" hider....

Those appear to be american knockoffs and i think you should sell them.....to me! Lol

Spuninmo said:

for the record....MD90 hider. looks completely different. View attachment 358879

Click to expand...

you very well could be correct sir. I'm in the middle of a PM90 sbr build. the only part i don't have is the correct flash hider. i was in a hurry last night when i saw this one the member had listed. it does look a tad longer than a Romainian PM90 flash hider.

The guy above is correct. The cone is for the National Match Chinese. The bottom is 762 knock off, as the Chinese are actually made for the .556 bird cage design and are dimensionally different. Funny but I was just organizing them the other day doing the what belongs in what drawer. Hope this helps good calls above.

The muzzle nut is indeed a Chinese one.