What is this??? (for the Benelli M4)

[mikeinla]

What is this?? I picked up a used Benelli M4 and this was in with it.

[CandG]

How big is it? It doesn't look like anything I've seen in my m4, maybe it's part of an aftermarket accessory? Here's a parts diagram for the m4: https://www.brownells.com/schematics...M4-sid916.aspx

[mikeinla]

How big is it? It doesn't look like anything I've seen in my m4, maybe it's part of an aftermarket accessory? Here's a parts diagram for the m4: https://www.brownells.com/schematics...M4-sid916.aspx

One side of it has threading in the hole.

[CandG]

I honestly don't think that's a part of the gun. Maybe just something that fell off his workbench and landed in the benelli's box

[LowThudd]

Magazine plug? Don't know, just thought maybe.

[therealnickb]

It's the pistol grip bearing adjustment tool.

[tinman1975]

Only thing I could think of is its half on an oiler bottle.....something like

https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=1386&idcategory=55

Does it smell like oil or have any residue in it?

[mikeinla]

I sent the seller a PM and asked what it was. This was his response.

"The block is a tool for one of the mods on the m4"

I still cannot figure out what mod it is for.

[antiseen]

I sent the seller a PM and asked what it was. This was his response.

"The block is a tool for one of the mods on the m4"

I still cannot figure out what mod it is for.

Well, what are the "mods?"

[CandG]

And let's see a picture of this bad boy while we're at it!

[mikeinla]

And let's see a picture of this bad boy while we're at it!

9 more days

[JagerDog]

Shoulder thing that goes up.

[bsg]

congrats.