Posted: 1/29/2023 9:07:08 PM EDT
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I have a YHM QD .30 Phantom suppressor sitting in my safe unused and I'm kicking around building a smallish AR10 in .308 for shits and giggles. I've spec-ed out an Aero M5 receiver set and their 15" Atlas rail, a Toolcraft dual ejector BCG, and a Faxon Big Gunner profile, 16" barrel. I can't decide if I want to go w/ a fixed A1 stock or something collapsible. Someone talk me off this ledge... |
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Quoted: I have a YHM QD .30 Phantom suppressor sitting in my safe unused and I'm kicking around building a smallish AR10 in .308 for shits and giggles. I've spec-ed out an Aero M5 receiver set and their 15" Atlas rail, a Toolcraft dual ejector BCG, and a Faxon Big Gunner profile, 16" barrel. I can't decide if I want to go w/ a fixed A1 stock or something collapsible. Someone talk me off this ledge... Sorry OP. My 16" AP M5E1 is my favorite rifle. I say jump off that ledge. |
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Quoted: Pics? Need inspiration... Quoted: Quoted: My 16” .308 is one of my favorite guns. You should definitely do it. Pics? Need inspiration... 16" Armalite AR-10B with YHM .30 ULT. Attached File |
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Quoted: Build one with an 18" barrel. 16" wastes too much powder. Problem solved. I love my 16" .308 Attached File |
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Quoted: Build one with an 18" barrel. 16" wastes too much powder. Problem solved. This. It is not so much power lost as it is muzzle blast if you ever have to shoot it without hearing protection / suppression. The difference is VERY VERY noticeable. Goes from painfully loud (18 inch) to HOLY FUCK THAT FUCKING HURTS loud (16 inch) |
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Had a P/W 16" .308 and it was a solid rifle....... after figuring out the gas adj, spring weight, and buffer weight. Ran fine afterward suppressed and unsuppressed. Still have a 18" and a 12.5". Those actually run well and required less fussing with weights and gas adj.   |
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I agree! I built one, tried to do another but 14.5" barrels are damn hard to find! |
| I like shooting my 16" Aero, but not as big of a fan of carrying it. It's about 13 lbs with the can on it and a 10 round mag. Could be worse, but if I was doing it over again, I'd have gone lighter on everything to drop a few lbs. It's fine for a while, but I was definitely ready to put it down after carrying it hunting for the day. I can't talk you out of it, because they're fun rifles, as long as you don't mind the weight. |
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Quoted: About 50 fps mv. I prefer 16" for my use. Quoted: Quoted: how much velocity loss are we talking for the same round out of a 16" vs. 18"? About 50 fps mv. I prefer 16" for my use. Depends on the load. OP said talk him out of a 16 in. I'm trying. We still want him to build something. 
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16" is my favorite length in a semi-auto .308. You lose less than 100 fps from an 18 and less than 150 fps from a 20" but you gain a handier rifle. Even better if you can find a rifle length gas barrel. My M5 build will have a Criterion whenever I get around to finishing it. My 716i with a Dead Air Sandman S, Dead Air 3 prong, Kahles K16i, Nightforce 1.375" Unimount, SSA-E, B5 SOPMOD Bravo, H3 buffer and Ergo Grip. Without the can it weights all of 9lb 7 ounces. Optic and mount combo weighs about 22 ounces putting the rifle without optic at around 8lb 1oz; with the stock H2 buffer it's 8lbs on the money. Ruger SFAR is supposed to be 6lb 13 oz. Never once did I think "Gee I wish rifle weighed 1lb 4oz less" when when I carried it last hunting season climbing canyons for miles and miles. If anything the can was the biggest annoyance when scrambling canyons or pushing through scrub oak, took it off more than once for those instances due to the length. The 716i was the lightest rifle in my party because everyone else had traditional bolt guns with heavy glass. "Don't be a bitch" applies. |