What to do with these lowers?

[MrFancyPants]

So I have a couple of AR-15 platform rifles already, and I have I think 3 lowers left to build something on. I haven't really decided what to do with them, hoping maybe the community can give me some insight. I have a few 5.56 and 223 Wylde rifles, a few 300 AAC (one is a pistol), a few 6.5 Grendel, a few 6.8 SPC, and a 458 SOCOM. There may or may not be some SBRs in the mix so I'm not worried about that. I have thought about building a 6mm ARC long barrel small game rifle since I've decided against a 224 Valkyrie which I was considering previously. Also thought about building a long heavy barrel 223, but given the limited effective range of 223 I don't know if it would be worth it for anything other than plinking. I do want a 22 LR converted AR-15 for training purposes for my boys when they get older so maybe I'll do that with one. I suppose I could build a 5.56 pistol with a 10" barrel? Or maybe a 223 Wylde 12" SBR. Maybe a 450 Bushmaster? Not sure if it would do anything the 458 SOCOM can't.

Other than the calibers I've listed, am I missing anything worthwhile? I think I'm good on large frame ARs for now so I'm not thinking about those.

[dousan]

[Ora Serrata]

7.62x39. I already have .556, 223 Wylde, and 300 aac. I also have an AK. My son and I had the chance to shoot an AR platform built in 7.62x39 and he enjoyed shooting that more than the other calibers. I didn’t think it would be much different from my AK, but it definitely had a very different feel and I liked it.

[Tere_Hanges]

Put some Colt 6920 uppers on them.

[verdigris]

Been thinking of building a 6mm Arc…Necked down 6.5 Grendel. I love my Grendel’s but even better BC’s.

[naz]

my $0.02 is leave them unbuilt fit now and make sure you have your stash of parts, ammo, squared away, and leave cash on hand on in case the recession materializes

[Garbcollector]

6mm arc

[MrFancyPants]

7.62x39.

I had thought about that but I'd rather have an AK if I'm going to shoot 7.62x39. I do want to get an AK eventually but I want to wrap up my AR builds first.

my $0.02 is leave them unbuilt fit now and make sure you have your stash of parts, ammo, squared away, and leave cash on hand on in case the recession materializes

Right now I'm focused on getting the critical parts for all the builds in hand, ahead of whatever asinine fed regulations come down the pipe. I ordered two more BCGs on sale today for the 6.8 builds. I've been trying hard to restrict my monthly gun budget but sometimes I get a little out of control.

[BrokerB]

10.5" 5.56 with flash can. Excellent trunk monkey that is convenient and will always have ammo laying around in all 50 states plus NATO world..supplies plenty

[ar15barrels]

So I have a couple of AR-15 platform rifles already, and I have I think 3 lowers left to build something on. I haven't really decided what to do with them, hoping maybe the community can give me some insight. I have a few 5.56 and 223 Wylde rifles, a few 300 AAC (one is a pistol), a few 6.5 Grendel, a few 6.8 SPC, and a 458 SOCOM. There may or may not be some SBRs in the mix so I'm not worried about that. I have thought about building a 6mm ARC long barrel small game rifle since I've decided against a 224 Valkyrie which I was considering previously. Also thought about building a long heavy barrel 223, but given the limited effective range of 223 I don't know if it would be worth it for anything other than plinking. I do want a 22 LR converted AR-15 for training purposes for my boys when they get older so maybe I'll do that with one. I suppose I could build a 5.56 pistol with a 10" barrel? Or maybe a 223 Wylde 12" SBR. Maybe a 450 Bushmaster? Not sure if it would do anything the 458 SOCOM can't.

Other than the calibers I've listed, am I missing anything worthwhile? I think I'm good on large frame ARs for now so I'm not thinking about those.

How many boys do you have?
Build a 22LR and a 5.56 carbine for each of them.

[MrFancyPants]

How many boys do you have?

Build a 22LR and a 5.56 carbine for each of them.

Two boys (and a girl) and I already have them squared away with a box each full of parts to build their own on their 16th birthday. It'll be a good learning experience for them to go through the process. I also figure since an AR-22 would be a training gun, they can share it as I'll be with them and focused on one at a time.

10.5" 5.56 with flash can. Excellent trunk monkey that is convenient and will always have ammo laying around in all 50 states plus NATO world..supplies plenty

That's what I've been thinking for one of them.

[kenl]

Bear Creek sells a .22mag upper that looks good.

[BajaJames83]

Mcx build and or 6x45 if you reload.

[walmart_ar15]

Build pistols. 9mm, 300BO, between 8 - 10" barrel. Compact, full powder burn more stable platform than your typical handgun while provide more energy down range.

[MrFancyPants]

Build pistols. 9mm, 300BO, between 8 - 10" barrel. Compact, full powder burn more stable platform than your typical handgun while provide more energy down range.

So I already have a 10.5" blackout pistol, and I had looked into a 10mm AR pistol previously as I would think that would be a fun little compact, but I kept reading that the current options have very sketchy reliability. This was awhile ago so maybe they've gotten better.