What calibers can I use with my lower

[Plinker66]

Save yer money and stick with 5.56

 

[Hayata]

7.62x39 if you play in the AK/SKS space and already have the ammo.

 

[CTS Tactical]

List of AR platform cartridges - Wikipedia

en.wikipedia.org

 

[cmshoot]

I think 350 Legend will work with correct magazines

Yessir

 

[N.Ga.Trader]

The list is a very long one. The common calibers are:

-.223/5.56
-.300 Blackout
-.22LR
-7.62x39mm
-.450 Bushmaster
-.50 Beowulf
-6.5 Grendel
-6mm ARC
-6.8SPC
-.224 Valkyrie
-9mm
-.40S&W
-.357SIG
-10mm
-.45 ACP

When you start looking at such things as single-shot bolt action uppers, you can go up to .50BMG and 20mm.

Not to mention the countless wildcat chamberings

 

[tstover]

Where's the 458socom love? I think that's my next pistol upper. Nothing like 500grain fire balls

 

[Jarebearlaflare]

Where's the 458socom love? I think that's my next pistol upper. Nothing like 500grain fire balls

Careful sometimes the big bore calibers require a XL receiver

 

[Talos]

The list is a very long one. The common calibers are:

-.223/5.56
-.300 Blackout
-.22LR
-7.62x39mm
-.450 Bushmaster
-.50 Beowulf
-6.5 Grendel
-6mm ARC
-6.8SPC
-.224 Valkyrie
-9mm
-.40S&W
-.357SIG
-10mm
-.45 ACP

When you start looking at such things as single-shot bolt action uppers, you can go up to .50BMG and 20mm.

20mm AR upper? I was already questioning the lowers durability on a 50 bmg upper lol.

 

[cmshoot]

20mm AR upper? I was already questioning the lowers durability on a 50 bmg upper lol.

They exist, and work fine. No durability necessary, you are only using the lower as the fire control group and stock.

 

[Talos]

They exist, and work fine. No durability necessary, you are only using the lower as the fire control group and stock.

You don't think the recoil against the take-down pins could shear them or possibly break the stock?