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Old July 30, 2023, 01:51 PM   #1
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Last of the Orphaned Uppers are Orphaned No More

Well, I had a few lowers that I would swap uppers around on for many years.

Got away from tinkering with ARs for a bit, but in 2023 I had regained interest in messing around with them.

These two are a 24” fluted bull barrel and a reworked 6.8spc upper that was previously not functional with a Green Mountain 16” barrel.
I’ve recently posted about the 6.8 upper, but for weirdness I went with a 10.5” ARP barrel with a 6” flash hider that I pinned and welded.

The 6.8 got a AeroPrecision LPK, 2-Stage Nickel-Boron Trigger sold by AeroPrecision, which turned out to be decent. It received an H-3 buffer and I decided that the standard carbine stock would be sufficient. I felt a more expensive stock just wouldn’t be worth any improvement.

The .223 Wylde upper got a CMMG LPK. I was disappointed in the trigger as the stock CMMG triggers are usually better than most “enhanced milspec” triggers that I have tried.
The CMMG trigger got ditched an replaced by a Larue MBT, which I like. The MBT isn’t a Geiselle, but still nice all the same. The wide bow is a bit odd.
I had an A2 stock laying around from a different project, so I opted to use that instead of purchasing another stock. I did have to purchase the buffer and tube.

Went out and did reliability testing today, they both function flawlessly. I didn’t test for accuracy yet, it’s hard to find a spot with more than 50ft of visibility in my forest.

These are the most ridiculous of my uppers, that’s why they were the last to get their very own lowers.

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Last edited by rickyrick; July 30, 2023 at 03:19 PM.
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Old July 30, 2023, 03:51 PM   #2
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I have said I will just swap lowers a few times but always end up building a dedicated lower for the upper I built. I also built a 223 Wylde long barrel (24 inches) for fun shooting, I haven't built up a load for it but found it likes the 62grn PMC ammo.
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Old July 31, 2023, 10:41 AM   #3
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One of the things with AR's and modifications is when you keep all the replaced parts and then look at the pile and say "if I add an X and Y I can build a new ..."
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Old July 31, 2023, 09:33 PM   #4
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Well about the only parts that I have left are a couple buffers, a couple of buffer springs one handguard, a 6.8 BCG, a 6.8 barrel that constantly short strokes (might need drilling) and a ton of FCGs. Swapping uppers on lowers seemed like a good idea, but had became inconvenient. You can see some wear on the bull barrel’s handguard from bouncing around loose.
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