Mounted a DPMS 16" SS bull barrel assembly that's free floated I like very, very well but only came with a picatinny rail on top of the gas block and the handguards are aluminum so I can't mount anything on the one rail or it will block my scope. Looks like my best option for mounting a light would be under the barrel and this involves buying a four rail gas block apparently. Never changed one but looks like it would just unbolt and place a new one on? No sights to have to work around.

Its a piece of cake. Remove set screws and remove gas block, remove gas tube by driving out roll pin(left to right) with 5/64'' roll pin punch, intall gas tube in new block(make sure large hole is on bottom), drive block home, level and tighten set srews. Good idea to use purple loctite. Then go shoot it to make sure there are no problems.

I would not recommend putting anything besides a sight on the gas block. One little bump and you can knock it out of whack and the gun wont cycle. And if you are dead set on getting the 4 rail GB, DO NOT get a UTG one. I had one a while back, and the heat from repeated firing made it expand and move. Causing to gun to not work.

What kind of handguards are you running now?

Everything Anonymous said was dead on.

On my DPMS carbine there are two shallow ''dimples" drilled into the underside of the barrel that the set screws from the original gas block stuck down into. Not threaded holes just "dimples'' that the set screws stuck down into. That gas block was not going anywhere. If you can find a new railed gas block that has at least one set screw hole that lines up with one of these i think you could mount whatever you wanted on it.

None of the 4 railed gas blocks Ive seen use set screws. The ones Ive seen are all clamp on.

Brownells makes (well sells with thier name on it) one. Its basically a single rail set screw type that is set up so you can bolt additional rails on any of the other three sides. They even sell a bolt on bayonet lug for the bottom of it. You can get the block and three additional rails for around 50 bucks if im not mistaken.

Just replace your stock dpms aluminum handguard with a quadrail! That will allow you to mount anything and everything.

What's involved in changing out the handguard on a free floating rail? Here's my set up for clarification. Thanks guys!

http://www.midwayusa.com/viewproduct/?productnumber=496810

Have you thought about using a VTAC light mount? They are cheap, small enough to fit on your gas block, and have the light to the side so it wont block your view through the scope.

VTAC light mount



If you are afraid the base of the mount will get in the way of the scope (which I don't think will be an issue), you can look for a mount or riser that will elevate your glass.

Thank you plea that's EXACTLY what I was looking for. Many, many thanks!!!! Ordered tonight!

Now you just gotta post some pics of that bad boy!

Will do Steve once I get it all hooked up. pretty pumped about this build!

Glad I could help Creek. Like Steve said, post some pics of that bad boy when you get a chance.

got my Viking mount in today Plea and it is perfect for what I need! And solid as a rock. Pics coming up later this week when I get my cam back and many thanks for your help. Looks like a great product.

good job on the build ...now lets see it man,lol. We need more gun porn!

I'm glad everything worked out Creek, we are eagerly awaiting your photos.

I've used one of those Viking Tactics mounts before. They are nice especially for they price.




TS