re: Official AR-15 thread

As far as my other question if I get a mid length vs carbine length gas system in a complete upper is there any advantage to either?

Prop...


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Is this yours you made? Who machines your stuff?

Are the barrels quality? Are they 1:7? It's a good price point for me.

I have swapped out the pistol grip for a Magpul since the pic was taken.

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As far as my other question if I get a mid length vs carbine length gas system in a complete upper is there any advantage to either?

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The core issues are original design/reliable cycling/dwell time/overgassing.

Keep in mind that with a 14.5" bbl, you're close to the original M4 design specs and correspond to a carbine length gas system, whereas that same distance is reflected between a mid-length gas system and a 16" barrel - if you mix and match - (carbine and 16" or mid-length and 14.5"), then you might encounter problems you have to manage - overgassing (port size is your remedy here) and cycling issues (right size your buffer) are the most common. Also, there is some subjective differences in felt recoil, depending on barrel length, gas system and buffer weight. Fixing one issue (recoil), might cause cycling issues with, particularly, light bullets and you will have to find the right balance for your gun.

Another phenomenon from all these mix and match choices is that, for all practical purposes, a lot of these home built guns are one of a kind, and each has a personality and ammo that it "likes" and "dislikes" - as well as other quirks.

Hope this helps.

ETA: And in case it isn't clear, almost all carbines are going to have overgassing compared to a rifle. When I use that term in this post, I mean "excessive" for a carbine.

I'm done talking I will order today. Should I go with a drop in CMC, Velocity, etc or just standard milspec for my trigger? I'm not going to be shooting matches or anything that I forsee but want a trigger that is decent.

ALG ACT

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Finished my AR-10. Need to get out and shoot it now.

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Good god that is a long rifle. You need a mirage cover for that suppressor.

I would never go over 20 inches on an AR-10 in .308.

Understood. Either way .308 has much higher diminishing returns past 18-20 inches.
Edit: Not trying to disrespect you or your gun...I just would personally not build a .308 on an AR platform past 20 inches as saving 4 inches would be more important to me than the extra fps gain. On a bench gun though, extra length would be more important to me.