[smokingfrog]

I think he must be talking about a DPMS AP4.

That .22 caliber survival rifle is an AR-7.

[lookout88]

Yeah, I thought the AR4 was a .223?

[hiredhand]

I think he must be talking about a DPMS AP4.

That .22 caliber survival rifle is an AR-7.

OH... one of my sons has a DPMS AP4. ...funny thing about that rifle. He "thought" it was heavier than the Armalite equivalent. So we removed the uppers. Then we removed everything that was removable from the uppers (sights, rails, lights, bolt-carrier/bolt, charging handle...etc.). Then we weighed the uppers.

There wasn't much difference between the DPMS AP4 upper and the Armalite M15 M4-clone upper.

So we took the lowers and removed the sliding portions of the stock, and the recoil buffer and spring. The DPMS lower was about a FULL pound heavier than the Armalite lower! We didn't remove the trigger groups or mag release. We DID measure the magazine well diameters and the DPMS was .010 smaller all the way around. But I don't think that could account for a pound of metal. They both appeared to be dimensionally very similar in the machining on the insides. But something was definitely different...to the tune of a pound of metal!