I just got this in along with the parts to make the SPR. I have yet to fully put it through it's paces so I'm mostly going to focus on the features and the advantages of buying this lower swap bundle.
Mine came with the AKM lower installed, good, that's what i was curious about. works like an AK, feels like an AK, just now with the addition of a dust cover release latch behind the mag release catch. It installs to the gearbox with 2 more scores but that means nothing, the bundle comes with ALL the hardware you need so you end up with extras.
The quick swap features work exactly as advertised which is GREAT! But it's swapping out the lower that is the hardest part. It's a relatively simple procedure, you just need to keep the gears aligned properly with the fire selector gears, which in my case meant using an alen wrench to hold back the trigger while installing.
The AKM lower features a twisted feed tube to make up the difference to the hop up. I'm SURE It's fine, but it's one of those things that says to me "i'm going to jam more easily and make using an unjamming rod more difficult" BUT that's me.
However, compared to the M4 lower it is more simple in it's buttons. Also the M4 lower will need you to use a long arm allen wrench (or equivalent) to reach the screws in the mag well.
It comes WITH an AKM magazine and at this point it is the only magazine that works with the the AKM (to my knowledge, standard AK mags will not cooperate, they are the wrong size and the tube ends up in a very different spot). It is my personal opinion that while the AKM makes for a faster and easier mag swap, this proprietary system does not compare to the already robust M4 mag selection currently available. To run an AKM you'll have to order a supply of proprietary mags. Think about what is best for you.
I don't personally like handguard battery compartments but this one is pretty good. They give you a lot of slack on the power cord which can work for you or against you depending on your battery. If in doubt i would recommend grabbing the long handguard. It lines up perfectly with the muzzel of the 11inch barrel.
This is a hefty solid piece of quality gun and i'm loving it so far (ordered the parts to turn it into the SPR). I still have to do a full season field test, so I give it a positive 4 rating.
Comes with both lowers and the AKM magazine
Folding stock swivel lock is solid, simple and effective
Quick swap system works GREAT
The Magpul MOE rail attachments sit perfectly! (optional component)
Monolith front sight is annoying and strips the paint quickly from its own force
11 inch barrel comes with a glued on plastic flash hider (obnoxious for those of us who like suppressors or tracers)
AKM uses a proprietary magazine
M4 lower has proven to not always be compatible with Magpul magazines (high cap hated it, T-Mag wants to be broken in)
Fire selector could stand a little more length for thumbing it in both directions (minor detail)
Rating: [4 of 5 Stars!]