Now let's address each accessory individually (we'll circle back to the firearm later)
The Hard case. Fairly thin with sliding locking tabs and an egg crate foam interior. It's not fancy, but it's not bad. Unfortunately it will not fit the pistol with the brace folded, and will not fit the pistol with anything larger than an MRDS mounted. PRO? CompM3? Romeo7? Case is now useless.
The flash hider. It's loose enough when mounted that it rattles, other than that it's fine. Easy to get on and off, but I'm not hopeful about how it will effect POI or accuracy.
The sling. Pretty standard, the metal hardware and the fabric seem tough and sturdy. The metal is very gritty from the parkerizing, however, and it's going to jack up the finish. I'll be keeping it because I'm a fan of the 3point sling, but buffing the metal parts.
The scope mount. Oh boy, this one is frustrating. Screws too short to even mount it, rail is almost tall enough to occlude the sights, mounting hardware is pure chinesium. I'm pretty sure century just bought these in bulk out of an airsoft catalog.
The cleaning kit. It's essentially useless. Same type you get from china for ""Authentic milsurp mosin/AK47/SKS/TACTICAL/G3/M14/FAL!"" party favors at gun shows. You know the table I'm talking about, the guy by the jerky vendor, with obviously fake SS daggers for $300.
It doesn't even have an actual chamber brush for the flutes, which irritates me more than it should.
The SB tactical side folding brace and adapter. Well, it's okay. It's a brace, we all knew going in those are a poor substitute. It locks securely enough, it fit fine on the pistol, it's more comfortable and significantly less expensive than the tail hook arrangements.
But the QD dling swivel retaining hole... doesn't. A firm tug on the sling will rip a magpul QD swivel right out, the ball detents don't lock into it fully.
The MKE steel 30 round magazines. I like them, they could hold 31 rounds if you forced it, which means there's some space under the follower to not overcompress the spring. (Chromed?) metal followers, they load easy and seem quite decent. Having one extra vs the core line just isn't worth the cost, however.
Whick brings me to the next topic, the cost.
I paid $1725 shipped for this kit. There's a $200 rebate, however, even at $1525 this is a waste of money when the AP5-Core is $1070 + shipping. Get a used or holiday sale brace, a stack of KCI 30's, and a soft case from Amazon and you're significantly ahead of this grab bag of "stuff"
I Strongly recommend Nobody buy the bundles, and instead get the pistol by itself.