Rocky1776

I'd like to put this Aero Precision M-LOK free float handguard https://www.aeroprecisionusa.com/m5-quantum-m-lok-handguards on my Windham Weaponry 308 AR with a 20" barrel. WW tells me that their barrel nut is DPMS threaded, which the AP handguard has, but the WW people I corresponded with couldn't say if their barrel nut was Gen 1 or Gen 2. The WW rail height is to Armalite specs, and they have doubts the AP handguard will line up with my WW upper receiver. I expect I am going to have to replace my gas block, as it is not currently a low profile design. Has anyone here ever tried matching these parts? Is there a workaround if the rail height doesn't match? Am I on a fools errand?

I don't think the salesman I was talking to said anything more specific. He had to check with the factory to even tell me that the gas block used on their 16" wouldn't work on the 20' barrel that I wanted, so he was just a messenger. He did say it would work on their 18" barrel.

Actually, Windham Weaponry did say that their gas block with the bayonet lug was drilled differently than the one used on their 20 inch barrels.

I just found this: https://www.brownells.com/rifle-parts/gas-system-parts/gas-system-hardware/modular-gas-block-lug-prod26332.aspx

That is very interesting, but it also looks extremely bulky and massive. ? I'm thinking about welding a mount onto the bottom of the gas block that comes with the rifle. I'll have to see if the geometry works out for that, and if I can get someone to do it for a reasonable price.

The zombies! ;-) Iirc, the original AR 10 had a 20” barrel, and I am sure it had a bayonet. So it’s an AR 10 clone with optics capability, like an M16A4 with more range and power, or an SR25 that you can still use when over run. I won’t need it. My grandchildren might. Mostly it’s one more feature to annoy authoritarians.

That might solve the problem. I didn't know that was an option. The difference might not be much, but my understanding is that with a longer barrel, the velocity is greater, the blast and recoil is less, the sight radius is longer for back up flip up sights, and bayonets work better on a longer stick. Short barrels might be better for carrying, and be less cumbersome in the brush, but that won't be an issue on the range, or anywhere someone wants to take a longer shot. If you want to clear a room, get an M4.

Who needs standard capacity magazines?...

I am a total newbe to 308 ARs, and ARs in general. I am about to purchase a Windham Weaponry 308 AR, and I need all the advice I can get. I want a 20" barrel and a gas block with a bayonet mount. WW says I can have one or the other, but not both at the same time. Of course I need the bayonet in case I run out of ammo before the zombies reach me... Anyway, I'm not finding much in the way of 308 ARs with bayonet mounts. Am I sol, or is there some aftermarket solution that will be compatible?

I did a search for, gas block AR10 bayonet, and the second result that I got was a post on this forum.