Muzzle Device Shimming - How Much is Too Much

**Deadman William** · 09-30-21, 13:00

Originally Posted by Dutch110

What's to keep the jam nut from working it's way loose?

the pinned and welded muzzle device, no?

**Dutch110** · 09-30-21, 13:25

Originally Posted by Deadman William

the pinned and welded muzzle device, no?

But if it's pinned and welded then why do you need the jam nut? I was actually thinking in terms of non pinned and welded applications.

**Deadman William** · 09-30-21, 16:13

Originally Posted by Dutch110

But if it's pinned and welded then why do you need the jam nut? I was actually thinking in terms of non pinned and welded applications.

to give you the spacing flexibility you need. im not endorsing this option, just answering your question. i wouldnt want a visible gap between the shoulder and the muzzle device. but i also wouldnt want a third of an inch gap anywhere. that would give you less than half of the available thread engagement, and... the gap. not acceptable, to me. id be using a longer barrel or a longer muzzle device.

**Dutch110** · 09-30-21, 17:02

Originally Posted by Deadman William

to give you the spacing flexibility you need. im not endorsing this option, just answering your question. i wouldnt want a visible gap between the shoulder and the muzzle device. but i also wouldnt want a third of an inch gap anywhere. that would give you less than half of the available thread engagement, and... the gap. not acceptable, to me. id be using a longer barrel or a longer muzzle device.

It's not acceptable to me either. On any application. That's why I said it wasn't an option I would choose.

**titsonritz** · 09-30-21, 18:50

How much is too much? That's too much.

**HKGuns** · 09-30-21, 20:02

Originally Posted by georgeib

Only $60 to boot! Supposed to be the most effective flash hider on the market, according to that big TTAG test they did a few years ago.

I wrote JP and asked about those flash hiders and they confirmed they are indeed the M249F they bought from BE Meyers.

Hi,

We've purchased the IP to their design and have incorporated it into the 2 flash hiders you mention.
Hope this helps.

Adam Burt
General Manager
JP Enterprises, Inc.

**georgeib** · 09-30-21, 20:05

Originally Posted by HKGuns

I wrote JP and asked about those flash hiders and they confirmed they are indeed the M249F they bought from BE Meyers.

Nice. About as close to zero flash as it gets. And for a fraction of the M249F cost. I looked around and they're available for a few bucks under MSRP at a few different sites.