the reason it was considered a failure was that it didn't do so well on full auto,mostly because of the inaccuracy and the 20 round mag was gone too quickly- this thing was envisioned with giving the average soldier BOTH pin-point rifle accuracy AND light machine gun capability - they even went so far as to redesign the stock and add a heavy barrel for the full auto- and full auto WOULD crack and BREAK receivers - if i recall , there were also some ( think it was winchester) receivers that were prone to breaking right out of the factory-- granted , it's a SUPERB semi-auto rifle- esp when scoped and tricked out- like the m21-m25 series, but in it's fulfullment of the concept it was a failure- incidentally, i know a few guys in the states that have class 3 m14s( f/a) and they claim it's no worse than any of the other lmgs at the time, such as our venerable c2- pr g3, provided you stick to 3-5 shot bursts, where the accuracy drops off is the 20 shot full mag, quick change stuff- considering that even the m-60 has to have a barrel change evey 200 rounds. or so says the manual