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9/22/2017 12:11:25 AM
Posted: 9/9/2005 1:29:08 PM EDT
[Last Edit: 9/10/2005 3:50:05 AM EDT by BB]
I'm looking at building a recce-type upper, and I'm considering the YHM flip-up front sight gasblock with bayonet lug. I have a Matech 600M BUIS I will be using on this upper, and I'm wondering:

1. Is the YHM front sight the correct height for this BUIS?
2. Is there a crosspin to secure the gasblock on the barrel so it won't slip when impacted?

Link Posted: 9/10/2005 7:41:03 AM EDT
1)yes, as far as I know
2)No...it's more or less a "clamp", 4 screws hold the upper and lower halves together. If you loctite the screws and crank down on it, I can't see it moving under normal wear and tear.

I've got this gasblock/sight. It's nowhere near as cosmetic as their older model, but it works. It's also pretty heavy as well.

I really preferred the older design..I don't know why they changed it.

Here's the one you're talking about mounted...

here's the older style, for comparison
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