Aren't all of these "small frame" 308 ARs based off of the DPMS G2?
What makes POF think they own the intellectual property?
The POF used an AR-15 length upper/lower and moved the Fire control group back to make cleance for the bigger mag well at the rear.
The G2 extends the upper/lower about 5/8" to make clearance on the front and uses a bigger bolt diameter for a stronger bolt.
G2 carrier is the same diameter as the AR-15 but longer by about 5/8"