I purchased this extension for my JG 416 PEQ to accomodate a systema TBB. It fit really well and it looks great on my gun, a big cosmetic upgrade. On the side it is labeled: "C MP 5.56 nato 1/7". It is about four inches long and made out of steal or pot metal.
You can attach a flash hider or silencer on the end.
Made out of top notch metal
Some weight (not a con)
Rating: [5 of 5 Stars!]