Gas blocks for the AR 15 come in a variety of different flavors. From the venerable A2 style to adjustable types to the ones with a Picatinny rail on top. The world is your oyster when it comes to the type you desire, but the lightweight low profile gas block seems to be all the rage. It should be functional, minimalist, and as light as possible. Oh, and it shouldn’t impede the installation of a free floated hand guard in any way..
Bill Geissele is known for his triggers, but he’s a man of many talents, and various other bits, parts, and tools are also in his portfolio. He was kind enough to send me a Super Gas Block to test out. Two varieties exist, the first being the standard edition I tested. Or for $10 more, you can have the nitrided version for your all black build. Installation is a snap and like I expected, it fit perfectly. The Geissele model also includes a 3/16″ pin used for their “Bombproof Installation” detailed here. That particular step requires drilling your barrel to install the pin, a step I did not take on for the purposes of this build.
TWith the “Bombproof Installation” pin, the whole system weighs in at 1.7 oz. Without that pin, gas block and hardware weigh in at 1.6 oz. That’s about as light as it gets before things start to get a little crazy. I’ve read about people chopping down gas blocks to get the lightest thing possible, but I imagine there’s some diminishing return to go down that path. And given the fact that the gas block is containing lots of hot gases intent on escaping an area where I normally place my support hand, I’ll take reliable and steady for the cost of a few ounces. The only other lighter model I’m aware of is the VLTOR set screw type which claims 1.4 oz, but I haven’t verified that. So for now, this is the lightest gas block I’ve ever tested. And 1.6 oz is certainly light enough for most people.
Once installed and peeking out slightly from a free floated hand guard, I found my Geissele Super Gas Block equipped AR 15 to run perfectly just like it did before, a fact that pleased me to no end. I also appreciated the silver looking finish to contrast with the all black barrel and hand guard. That may not be your particular cup of tea, but I thought it looked cool, and I’m pretty sure looking cool is something everyone wants no?
Specifications: Geissele Super Gas Block
- Style: Low Profile
- Inside Diameter: .750″
- Adjustability: Non adjustable
- Included parts: Gas Block roll pin, 2 set screws, bombproof pin, Super Gas Block
- Weight: 1.6 oz without bombproof pin, 1.7 oz with pin
- Price: $59 as tested, $69 for the nitride version. Available from Primary Arms for $49.99
Overall Rating * * * * *
I find it hard to go on and on about a gas block. But when you’re trying to shave ounces off a rifle build without sacrificing function, you can face some challenges. The Geissele Super Gas Block works very well, reduces a little weight, and doesn’t cost a fortune. It also happens to look good doing it. If you’re considering a gas block for your next build, give the Super Gas Block from Geissele some consideration. You’ll pay a bit more, but if light weight, good looks, and reliable function are what you desire, the Geissele gas block is worth it.