Hi guys,
as the DD Omega rails are quite tight on the inside, I wanted to know what LoPro gasblocks will fit under the Omegarail without having to modify it?
Inparticular interested in the fit VLTOR gasblock and 12’ Gasblock.
Thanks !
It’s nearly impossible to cover a gas block with an Omega rail. I’d suggest a Lite Rails or RISII rail if you’re wanting to do that.
Notice gotm4 said “nearly”. He posted pics of a gas block he made out of a standard front sight base that I believe he said fit under the Omega. It looked like a lot of work, and he mentioned a lot of tools he used to do the job right.
And that is why he ended with “impossible” 
sir venom, ive tried using the stag low profile gas block and the PRI on DDomega rails, tight but it will fit under the rails. have an VLTOR, but really never tried using it… maybe il do it one day. hope this helps
Yep…it’s just not worth the effort.
If I had charged for time/labor that would have been a $200 shaved FSB. It was that much of a pain in the ass.
That was a FSB on a .625" pencil barrel (14.7") with a perm. attached A2 flash hider. I had to grind and mill on it while it was still attached to the barrel. .750" barrel? Forget about it!
thanks guys !
is the RIS II also 12’'?
Juan, how does the Vltor compare to the stag arms / pri lopro blocks?
thanks
The RISII rail is 12"
Venom, just wanted to let you know I’ve got a pri gooseneck gas block on my omega 12. With a dremmel and about an hours worth of work I’ve got a great set up.
V, the vltor seems a little bit smaller than the stag arms gas block and will fit on the DD omega… il show you some pictures soon
For what it’s worth - I just installed a DD Omega 9.0 on my BM carbine, went with a CMMG .750 Micro gas block (per DD’s recommendation) and it all worked out well.
Give the rail a hard whack with a rubber mallet and tell me it the rail hits the gas block.
Just out of curiosity…if I hit my hand guard with a hammer hard enough to deflect it and contact the top of the gas block, what’s the outcome?
SPECS:
–– 14.5 ADCO CMV CL 1/7 carbine gas (I know, I know) A2 FH…soon to be Surefire MB556AR brake
–– DD Omega 12.0 w/ DD low pro GB
–– CMMG lower w/ RRA parts, Magpul MOE grip and trigger gaurd
–– Magpul MOE stock
–– Magpul MBUS front and rear
I did a mock up of a 12" Omega and a Noveske/Vltor gas block on my Afghan barrel. The fit was too tight for my comfort. As I recall, the top of the rail wasn’t the big issue, the area near the pin and set screw was really close to the bottom rail. I wish I had taken a picture. Fit was perfect with a Lite rail, plenty of room.
Contact between the gas block and barrel will cause erratic vibration which will in turn cause weird accuracy. You might not see it at 25yds but you sure as hell will see it at 200yds+. That 10-15 thousands clearance between the gas block and rail/FF tube seems okay until you actually shoot the rifle at some distance.
I’m may be wrong, but it seems like it has decent clearance to prevent contact.
Can you make the rail smack into the gas block? I’ll bet I can.
There’s a reason why RISII and Lite Rails have much bigger and stronger bolts holding the rails in place.
It’s because people like me who run shit very hard and have broken, bent stuff.
I wouldn’t trust an Omega rail mounted with it’s four small allen screws to keep the rail from hitting the gas block when the gun is run hard. The Omega is a fine rail for what it is. It wasn’t meant to cover a gas block.
Yeah, I’m sure I could if I tried, but I think I could make any full float hit if I tried hard enough…that’s why I’m still not 100% sold on any of them yet…
I took a stab at shaving my FSB over the weekend and decided to switch to a DD Lite 10.0. Not sure if I’ve taken it down far enough yet, guess I’ll find out when the Lite arrives and break out the grinder again if need be. I ended up taking about 1/8" off the taper pins to get them to match the new profile.
That’ll easily fit under a Lite Rail. If you got the pins short enough the rail will easily slide over it.