FMK 40 round mag tips needed

[ferndog1]

I couldn't find any South African (?) Bird of Prey mags, so I bought several 40 round FMK magazines. They lock in, but reliability is spotty at best. I measured/compared them to 32 round UZI mags and everything, except the "stops" on the sides to prevent over-insertion is the same.

Does anyone have any fixes or advice? (besides throwing them away)

 

[tonelar]

how do they work when you load them at 20-25 rounds?

 

[chili17]

over insertion is a problem with them. I brazed stops on the ones I have to prevent this. Rule of thumb with them is to insert and pull down on them. Be carful and make sure you control the bolt with them. I have seen alot of ADs when people have a malfunction with them and just pull the mag out to clear it, bolt will drop and AD will occur

 

[MGMAN45]

I couldn't find any South African (?) Bird of Prey mags, so I bought several 40 round FMK magazines. They lock in, but reliability is spotty at best. I measured/compared them to 32 round UZI mags and everything, except the "stops" on the sides to prevent over-insertion is the same.

Does anyone have any fixes or advice? (besides throwing them away)

Through them in the trash.NOT MADE FOR UZIs

 

[dustindu4]

Most of these mags are too fat to fit in the magwell reliably. The other issue I have is over insertion. Just insert and pull down. Not a big deal for range use.

 

[arch stanton]

I couldn't find any South African (?) Bird of Prey mags, so I bought several 40 round FMK magazines. They lock in, but reliability is spotty at best. I measured/compared them to 32 round UZI mags and everything, except the "stops" on the sides to prevent over-insertion is the same.

Does anyone have any fixes or advice? (besides throwing them away)

Frank pm sent

Joe

 

[arch stanton]

As for them being tight yes that is very true you can remove material off the rear with a belt sander then size to fit. I sold a few hundred of these mags and all were milled to fit with mag release slots.

 

[ferndog1]

I have 6 spare magazine housings, the magazines fit in all of them but one.

 

[jb573]

The back strap usually has to be cut down a bit. Milling Machine is the best way to go.
Just make them the same as an Uzi mag.
Recut mag latch slot.
Add a mag stop on the side.
They work great.

 

[WHIZ]

I have 4x mags no issues although mine is a SBR Vector so over insertion isnt a problem for me anyway I will take them been looking for some 40s!