AR-15 Gas Systems

[Eric]

Gas Impingement Mid length as well. However, the current work blaster is a carbine. With that said, I don't fee at a disadvantage whatsoever with the carbine.

[rob_s]

Rob,
Just out of curiosity, why do you think everyone's first ar should be a carbine? I am getting ready to start my first build and am leaning towards the mid length, but would like to hear more about advantages/ disadvantages of the carbine length.

I think everyone should start with a 6920 (or now a 6720 from Clyde's) and start the learning process from there. I also think that, contrary to what may be perceived on the internet, the carbine length system still vastly outnumbers the mid-length and therefore offers a more likely source for cannibalizing spare parts, or purchasing spare parts, if necessary.

[ZH-330]

Fair enough! Do you think somebody just starting out would gain more from assembling at least the lower and purchasing a carbine length upper? Do you still recommend the 16'' barrel on a carbine length system? Thanks again! /Threadjack

[rob_s]

I suggest new buyers generally start with a complete factory gun. Comes with more/better support, allows the shooter to focus on shooting and less on mechanical issues, etc. I know all the arguments for building your first one and I don't buy into most of them. Nobody suggests that every teenager build their own car from scratch so I'm not sure why we suggest grown men build their first AR from scratch.

Some guys are into this stuff for the tech and the shooting is secondary, and for them I guess building comes first as it's the more interesting aspect. I'd rather get a functioning gun in someone's hands with the ability to get factory help if it stops functioning for some reason.

[Quib]

I believe if a person is mechanically inclined, has the proper special tooling required, the necessary tech/reference data required for assembly, and purchases quality parts backed by the manufacturer, that they can not only learn from the whole experience of building, but have a quality build without mechanical issues enabling them to focus on shooting.

Building your own allows you to be:

- The parts purchaser/Quality Control.
- The armorer/assembler.
- Quality Assurance

[ZH-330]

While I can see both points of view and understand the logic involved, I have to agree with Quib. I personally enjoy the technical aspects of assembling/ maintaining my own firearms as well as shooting. I hope to gain valuable knowledge of the ar platform from assembling the majority of my own boom stick. I am trusting in the knowledge of others to ensure the quality of the parts I plan to order as it would be unreasonable to expect that I would have a clue as to what works and what doesnt. I appreciate the insight though!

To the OP, I am glad this poll was created as I was wondering myself what was the popular platform/ standard for the modern ar.

[Army Chief]

GIML for me, as well. I don't really see a compelling piston benefit in a non-FA gun, and the mid-length configuration moderates the recoil pulse nicely, putting a bit less wear and tear on both the operator and the gun.

AC

[reiswigt]

Over the last two years I have gleaned so much information here. I have purchased/assembled much better choices with this sites help. My two current AR rifles are pistons. I am working on a dedicated .22 build. A 6.8 DI Mid-length is probably next. I am looking forward to having both DI and piston systems. Thanks again for the collective wisdom and willingness to help others.

[rob_s]

I believe if a person is mechanically inclined, has the proper special tooling required, the necessary tech/reference data required for assembly, and purchases quality parts backed by the manufacturer, that they can not only learn from the whole experience of building, but have a quality build without mechanical issues enabling them to focus on shooting.

Building your own allows you to be:

- The parts purchaser/Quality Control.
- The armorer/assembler.
- Quality Assurance

Yep. and IMHO it is still far better to get out of the gate with a quality complete firearm and get out there shooting than it is to muck around researching this and that with no frame of reference and no idea what makes one part better for a specific user beyond what they read on the interwebs.

The major fallacy with "build your own, you'll get exactly what you want" is that someone who is just starting out has no idea what they want or why.

FWIW, I myself wasted so much time with the "build your own" route. Truth is that at the time I was more interested in building a "cool" rifle and posting pictures to impress people on barfcom so it actually met with my requirements at the time. As soon as I started actually getting out and shooting I quickly realized how wrong almost every part of the gun was for me, and unfortunately for me I had made some expensive wrong discussions.

Colt 6920 or 6720, two cases of ammo, 20 magazines, and a training class. You will learn more, and more valuable information, than any amount of building a gun will teach and it will get the shooter off the internet doing research and out on the range shooting where the real lessons are learned and where decisions about parts & accessories should be made. and I bet it's cheaper in the long run too.

To come full circle, gas tube length is just one more thing that should be understood on the range and that no amount of research online can convey.

I know it's not a popular opinion and it's pretty off-topic for the thread so I've said my piece and will take my answer off the air.

[Quib]

.... pretty off-topic for the thread.....

This much I’ll agree with.

I’ve stated my side of the argument, as have you. And to preserve the thread and keep it on topic, I’ll leave it at that.

[Quentin]

Gas Impingement and Midlength for me. I researched months last year before buying my first AR and bought a middy upper to put on a stripped lower I built up. I must say I enjoyed the research and am doing it again now. Very educational and there's just something to This Is My Rifle... Sorry, drifting off topic.

[Deaj]

DI, carbine length gas system. There are more AR's in circulation with this configuration than any other. This would provide an advantage should parts related to the gas system be needed under the worst of circumstances.

[Paulo_Santos]

DI, carbine length gas system. There are more AR's in circulation with this configuration than any other. This would provide an advantage should parts related to the gas system be needed under the worst of circumstances.

Personally, that is one of my least concerns when selecting an AR. If something were to happen to the gas system, whether it is the gas tube or the piston rod, it will disable the AR from firing in semi-auto, but you can still manually charge it and have basically a bolt gun. Not ideal, but it will still shoot. Hopefully you will have a handgun to transition to. And it isn't like you are going to be in a fire fight and your gas tube breaks and you are going to have all of the tools and gear right there to change it out. I'd rather have an AR set-up the way I want and have spare parts for it. JMHO.