I've had an M4 OPS for two years. Virtually impossible to tell from a genuine AR by sight, weight or feel. Shoots great, ammo PICKY. The gun is made by Walther of Germany, excellent quality with a TIGHT match chamber. If the ammo brand is loosely spec'd when manufactured it will cause some failures to feed, fire or eject. After 600-800 rounds they smooth out nicely. Mine likes Federal bulk-pak. Standard AR trigger assemblies and breakdown procedures don't apply with this arm. It's design is totally proprietary by Walther. If you can get around the fact it's not a true AR, it's a nice little rifle. The standard 1/2X28 barrel thread must be gotten by use of a thread adapter, easily available. The stock body is mil-spec, but the tube itself is proprietary. A standard AR grip will work by drilling the holes out slightly. The accessory rails are standard. The dust cover will accept a standard AR unit. The forward assist is for looks and the safety selector is 180 degrees instead of 90. The newly produced ones may have changed safeties. The magazines are proprietary and Black Dog mags won't work. The mags are very easy to load and are reliable.
Last edited by rodent.22; 09-26-2011 at 01:33 AM.
Reason: more info....