The handguards wobble some and there is some looseness between the upper and lower receiver halves.
Really, not much different than some AR15s.
It comes apart so easy. Similar to an AR15 (push pins let the upper/lower receiver halves split) to start, then it changes. Once you get the receiver halves apart the lower handguard slides to the rear and down to remove the upper handguard lifts off once the lower handguard is off. Push on the lever on the outside bottom of the bolt carreir, pull the bolt lever/handle oout and the bolt/carrier will slide out of the rear of the upper receiver. Then press the button on the right side front of the gas system, turn the gas tube and remove it and the spring and piston from the tube.
Its simple, its quick. I've cleaned it, lubed it and hope to shoot it next weekend.
I got the SIG front and rear sights for it, too. Easy to install. My eyes aren' the best anymore (mid 50's now) and I find the sights on my M1A and AR15's tough to see most of the time (front sight post). For some reason the front sight on this rifle is a little easier to focus on. I don't know if its the hood over/around the front sight post or the way the rear sight is made (smaller holes in it than AR15 or M14 rear sights).
I got the little SIG red dot, too. Not sure how much use it will be (on this rifle). It is too low to co-witness with the iron sights. I put a 1/2" riser on the rail in front of the rear sight and that 1/2" made the red dot scope too high to co-witness with the iron sights - so its back to the iron sights. I thought it was cool though where the instructions with the sight said the battery could last 8,000 hours on the lowest settiing. 8,000 hrs.
It had a longer buttplate/extension in the box but I've read it can't be used on the newer folding stocks. Its just a hold over from the previous model of stock.
I can make the magazine wobble but it doesn't seem bad.
I put a small light on the left handguard/rail. I was happy to find that the light is easy to work with my left hand while still gripping the forend.
I put a single point sling on it (one attachment ring at the left side rear of the upper receiver and one at the left side upper part of the gas system.) and carried it around the garage and yard Sunday. Feels good.
Just waiting to see how it shoots.