308ARBuild

I'm on several forums as a member. This one has to be one of the top weirdest.... That's not an insult. I actually don't even know what to think about this forum right now.... ....backs slowly into corner...... .....but seriously, I'll leave. ....gas tube is too long, right?

It's not apart. I can do that, just not tonight. I'll take it down again tomorrow. My entire goal in coming here was to get confirmation that the gas tube was too long. To which, no one is even willing to speculate. Even though my pic shows it's too long?

You mean, I bought the best/compatible components from everything available?

Gas port lines up with gas block supplied by x-caliber (SA) pretty nicely. Gas block slides on nice and tight onto barrel. I don't know many barrel manufacturers that make gas tubes/gas blocks? I'm guessing that's an insult, but I don't understand it.... Recoil system (which has literally nothing to do with BCG/bolt battery) is JP SCS H2/FMOS BC in A2 tube. This has literally nothing to do with the issue. The issue exists shotgunned/split. I don't get the need to try to slam my set-up.

Also, you are being extremely helpful despite me being a smarta$$, and I appreciate it. I apologize for that comment, and do sincerely appreciate your help!

That's a great point. I did not explain what a Gibbz upper is, and for that I apologize. It's a side-charging upper receiver employing a specialized cam pin to engage the BCG to charge, and is non-reciprocating. That tab you have highlighted is the tab that catches on their special cam pin (with a raised portion to catch on that tab). I do not know the length of the tube. That will require me to take it back apart. (not a big deal, but I probably won't tonight). I'll pull it apart tomorrow and let you know. In the meantime, I did order a "DPMS" middy gas tube from Midway yesterday, just in case the LAR-8 was the culprit here. We'll see. In the meantime, thanks for the help, everyone! I'll update! (with pics)

Their "mid-length AR gas tube" is proprietary? Why would they call it "mid-length", make it fit perfectly to every gas block, make the roll pin identical diameter, length, longitudinal location, and orientation, make the bend in exactly the same location, degree, length, and curvature, and make the OAL within 3/4" if it's "proprietary"? Seems like it's the same gas tube, but maybe a bit longer? Proprietary means "relating to an owner or ownership", fyi.

haha fair enough

LAR-8 gas tube, mid-length (#308A0011C) I thought that was clear from my original post, when I stated it.

Hi, I'm new here. I have a problem with a build I'm trying to complete. I have a Gibbz arms G10 upper, an x-caliber 308, 20" mid-length gas system barrel, a superlative arms adjustable gas block, and a RRA LAR-8 mid-length gas tube. I also have a JP rifles Silent capture spring (H2), JP FMOS BC, and the bolt, pin, spring from X-caliber. When I first assembled my rifle, I noticed the BCG would not go into full battery. It goes "home" but will not go into battery. I have verified this is the case for the BC with and without the bolt installed. It appears the gas tube is too long, as it extends maybe another 0.25" past the bcg cam pin rotation cutout in the upper receiver. The gas tube also extends (by visual inspection) too far into the receiver to visually clear the bottom end of the gas key on the BC. How is a gas tube not standard? Thanks!