KAK Complete Upper Receiver- 300 WSM - 19" Barrel 15" - MLOK

GREAT PRODUCT HEAVY HITTER

This upper has made me a life time customer of KAK industry! They helped me out with countless questions that I had before I even purchased this and even assured this would fit another companies lower. The lower company is difficult to match with in my experience as it states they don't even match Aero on their website and this was my 2nd purchase to find another upper). I have owned the upper almost a year now and take it shoot quite often. Its definitely got some power from the magnum cartridge but still manages the recoil very well. The rifle was very accurate out to the short distances I have been able to shoot. I love to mag dump on steel from about 100-200 yards and watch the look on everyone's face around me wondering what the heck I'm shooting. My only compliant is the price of ammo but we all know whos to blame for that.

Shipping was faster than I expected for sure. Received the product I ordered and there was an issue. I contacted customer service who responded right away. They responded right away and sent me a replacement part to fix the problem. Build quality is great and I am very happy with it. Would definitely do business with them again. Customer service was great!

Received my order and was pleased with fit and finish. As others have said the upper is fairly heavy so would benefit from a good silent buffer spring with weight. Have not been able to sight in yet but expect no less than what has been found by others.

Function tested at 100 yards. 5 rounds Norma 180s. 5 hand loads 147 fmj. From 20 round metal pmag. (Only about 5 rounds will fit before they start to shift. Not KAKs problem that's the magazine). No malfunctions at all in the two 5 round strings. I was knealing with no sling and groups were about 1.5 moa. I would expect something under 1moa prone. Is it 1/2 moa? IDK maybe. Looks very nice. Not really light, but balance is OK with a medium weight collapsible stock. May change to a weighted A2 to shift it more rearward. It'll take a lot more rounds before a can really review its accuracy or reliability. But I'm glad I bought from KAK instead of trying to build myself. Seems the magnum gas length is a must. Doesn't seem over or under gased. But it is hard on brass. No worse than a .308win though.

I was able to find and use 150 gr federal fusion SP. KAK built an extremely nice and well finished upper. It really does look great. The federal fusion 150's fit great in both metal and polymer magazines. During barrel break in I was able to test metal mag"DPMS/c products", lancer mags and magpul mags. Metal and Lancer worked the best with very little feeding issues. Like the review above commented during break in I polished the feed ramp and this seems to have improved feeding. This upper was able to push the 150's at and average of about 3100 fps started @ 3050 and continued to get faster as the barrel broke in. I am really happy with that velocity from the 19 inch barrel. Accuracy on 5 shot groups single feed was 1/2 MOA @ 100 yards. This upper is ruff on bass and I would take that into consideration when looking to reload for it. I got this upper for taking big hogs around the 600 yard mark and it is going to fit that role perfectly.

The feed ramp needs polished, I ended up doing that so it feeds/cycles better. I am using a 10 rd 7.62x51 PMag, can't find any aluminum Brownell ones. Of course it could be the mag issue but the polished ramp took care of it. Once the ramp was smoothened it got to feed/cycle flawless. The quality of the build is great! No ejection issues, double ejector is right on as well as the gas block config