I DIY'd an Aero build and the people saying gassing is a pain in the ass are right.
Used a 14.5 BA barrel and Aero parts initially, along with an adjustable gas block because I'm not a total idiot. At first, it was UNDER gassed. Bolt wouldn't lock back on empty without a can. With a can, it was fine. Long story short, the parts I swapped to were: Magpul A5 length buffer tube (lets me use regular AR15 buffers instead of the stubby 308 buffers), carbine buffer, Tubb flat wire recoil spring, KAK BCG.
Something I found interesting in the testing process with the A5 length tube. Once I had the gas tuned in the general neighborhood, I tried it with and without the can (Surefire SOCOM 7.62) with a regular carbine buffer, H, H2 and H3 buffer. They all cycled fine with and without the can, however with the can, the felt recoil increased the heavier buffer I used. So I slapped in the carbine buffer, tuned the gas to run that unsuppressed and rolled with it. It runs fine now with or without the can, but it sure was a lot of troubleshooting and parts replacement to get there.
It truly would have saved me a loooooot of trouble to buy a prebuilt AR10.
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