changing from ar-15 to ar-10

[scar15]

Is it necessary to change out lower reciever parts or just the upper ?

[Colohunter]

They are built on different sizes, so you cannot switch between the two. You have to have a matching upper and lower for the ar-15, and a seperate upper and lower for the ar-10.

You can get different calibers for the ar-15, but they have to fit within the magazine restraints of the ar-15.

[LouBoyd]

Originally Posted by Colohunter

You can get different calibers for the ar-15, but they have to fit within the magazine restraints of the ar-15.

There are lots of caliber selctions for AR-10s (and clones) too. I have DPMS clones in 243 Win, 260 Rem, 6.5 Creedmoor, 308 Win , 338 Federal, and 300 SAUM. (all factory offerings).
Many more are available as custom or semi- custom offerings. Basically anything based on the 308 or 300 SAUM case is available.

[Colohunter]

Originally Posted by LouBoyd

There are lots of caliber selctions for AR-10s (and clones) too. I have DPMS clones in 243 Win, 260 Rem, 6.5 Creedmoor, 308 Win , 338 Federal, and 300 SAUM. (all factory offerings).
Many more are available as custom or semi- custom offerings. Basically anything based on the 308 or 300 SAUM case is available.

I completely agree, there are a lot of options for both the AR-15 and AR-10 platforms, I was just trying to explain that they are different sizes and are not interchangeable with each other. The AR-15 as a magazine fed rifle is limited to cartridges with about the same OAL as a .223. The AR-10 allows the user to step up to 308 class cartridges. (Obviously if you don't want to use the magazine you can use larger cartridges in the AR-15, such as 50 BMG conversions.

[buffetdestroyer]

There are 3 parts out of the lower parts kit that are different on the DPMS LR308 series. They are the take down pins and bolt catch screw (it's a screw instead of a rollpin). The bolt catch needs to be tapered on the bottom edge to fit, but a file or grinder will make short work of that and it will still work in a standard AR15.
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MERCURY COUGAR SPECIFICATIONS

[BLeeber]

What are some good (upper) caliber options in .223/AR-15 class for deer size game out to 200 yards?

Thank you!!