[Kable]

Ok so I'm going to check out the gun store today to see if they have lowers but I am a super n00b and I know there are different calibers for the AR15 and I'm not sure which one I want to go with but when i was looking online they didn't distinguish the lowers with a caliber so is the caliber based on what you get for the upper?

 

[JhankG]

The lower is not related to what caliber your upper is chambered in. Buy the least expensive one.

 

[Kable]

Wow thanks for the quick reply, anything special I should know, any brands to stay away from etc.?

 

[JhankG]

Not really, just choose the one that has the most appealing roll mark. For instance, a Stag lower will have a deer head which some don't like. I went with CMMG because I got a CMMG upper. I like that my lower and upper are made by the same company.

Most everyone will tell you that a lower is a lower is a lower.

 

[agalindo]

Actually it depends on the calibers your looking at. Some lowers will not work on cartridges that are too long for the 5.56 lower.

 

[JhankG]

Actually it depends on the calibers your looking at. Some lowers will not work on cartridges that are too long for the 5.56 lower.

But for your common AR calibers, any lower will do (223/5.56, 9mm, 45, 22 etc..).

 

[agalindo]

Yep.

 

[implode]

This is what I just ordered.

AIM CMMG MOD4SA AR15 .223/5.56x45 Lower Receiver with Internals CMMG MOD4SA AR15 .223/5.56x45 Lower Receiver with Internals