The magazine ring " Does not slide out " it " twist out " . w/ the pin removed , no need to remove the mag. ring , just slide the mag. tube out. But, w/ the mag. tube out of the way the tenon needs to be taped out from left to right ( use a punch ) they aren't usually very tight ,, then the forearm will slide forward .
What are you going to replace the stock & forearm with , just wondering , i just made 2 , that are close to finished ,( just in case of a mishap ).
coffee's ready ,, Hootmix.