Was at wally the other day and saw a sig and some ar m4 for like 490 bucks. The sig lookalike was actually a sig! Almost as heavy as a 556, uses the same machining on the lower and upper as a 556 rifle but it's rimfire. The m4 w/one piece rail handguard copy was the same as the sig with the magwell sized for 556 but was cut for 22rf. Neat and high quality, anyone have either of these?