mounting lights on a 16 inch faux dissy?

[CouchTater]

Apologies if this is a common topic, PRG (People's Republic of Google) did not return much...

The build I am thinking about is pretty basic, a straightforward point-and-shoot-win-the25-yard-fight sort of thing. Fixed buttstock, 16 inch barrel with midlength gas port, dot sight, no irons. Yes, no irons; I'm at the age where anything closer than 4 ft away is a blur. And preferably, a light at 12 o'clock. I don't need free-floating, I would love to have MOE handguards; cheap, light, simple.

I've seen some pics online of 16 inch dissy clones that look awesome, but there's the dang light mount issue. I like the Streamlight TLR series, I was thinking a gas block with rail at 12 o-clock would be the place to mount it nice and low and be "thumb-able". I've seen FSBs on a dissy, don't recall a railed "sight block" on a dissy. Even if there was one, seems to me the the light's lens would get polluted by muzzle soot pretty quickly.

I can think of these solutions:
- accept the soot and clean it as needed,
- move the light to the handguard and have it stick up a bit,
- go to a 18 inch bbl,
- mount a long FH/comp.

Anything I've overlooked?

thx

[jsbhike]

If you are mounting the light on a 1913 railed dummy gas block I don't think muzzle blast will hit a TLR lens. Should be positioned further back than the max forward mounting possible with a 15" rail on a 16" barrel.

[CouchTater]

Interesting! Thanks for the response.

[mrbieler]

16" midlength dissipator with a rail and a light. I had a TLR mounted there, but I moved that to another carbine.


A MOE with a light mount shouldn't be an issue and would put the TLR about where my light is now.

I think you'd need one hell of a wingspan to mount it out where the FSB is without a remote switch.

[CouchTater]

I think you'd need one hell of a wingspan to mount it out where the FSB is without a remote switch.

Great point, last time I was in the AR market, tape switch setups were the only option. I better get hands on and make some measurements...

[MistWolf]

Mossie Tactical Midnight Mount and a tape switch. The Midnight Mount clamps to the front of the FSB allowing the light to be set at 12 o'clock. A tape switch will let you set it at a location you can easily reach.

[jsbhike]

I have a 15" rail on a 20" that has a cut down FSB for a gas block. Holding a TLR-1 so the clamping screw is in the middle of the gas block positions the TLR1 body even with the ears on my MBUS front (@12.25"-12.5" forward of the upper) and the paddles further rear than that.

I am 5'10" with average proportions and I can place my thumb on the MBUS sight ears with my arm no where close to fully extended.

No idea if this place sucks or not, but I noticed this one extends the 1913 to the rear slightly.

http://damageindustriesllc.com/store/index.php?route=product/product&product_id=254