AR15 9MM MAG WELL ADAPTOR FOR COLT / UZI STYLE

The first mag adaptor that I recieved from KAK was too tight to fit in an Anderson lower. After discussing the issue with Chris the block was exchanged for a new unit but it was still too tight. After removing about .004" combined from the leading and trailing edges the fit in the Anderson lower was nice and snug---could be installed and removed with finger pressure. I took the finished rifle, KAK 9mm 16" barrel, Anderson lower with KAK mag well adaptor. and C-Products Colt style Duromag to the range yesterday and had no FTF issues! The product worked perfectly after the initail triming of the front and rear of the block. I really like the feed ram idea on the Colt style blocks, it definitely helps to eliminate feeding issues. I have a dedicated Glock lower and it has feeding issues, mainly becssue of no feed ramps and also the Glock and Pmag magazines are loose in the lowers mag well. On the contrary, the Colt style magazine when installed in the KAK mag well adator is a nice snug fit but drops our easily when the mag relaese is activated.. Thanks for the nice product.

Received in good order, Would not go into PSA lower so I used an Anderson. It was a tight fit. Ordered Pro Mag 32 and 25 mags which took some modifying to drop free. Metalform 32's drop out beautifully but jam when cycling dummy rounds. Haven't tried live fire yet but will soon. I'll update review afterwards. So far I am pleased.

Bought two of these an could installed both in the same lower, could tell that there was a noticeable different in how tight one was over the other. Tried the looser one in a different lower and it absolutely would not fit.

Initially a bit worried as, it fit as tight a a scotch mans purse. Tried several lowers before I found one it liked, kinda like college roommates.

I bought a Hahn 9mm conversion block and it works great but was almost twice the price of the KAK and does not hold the bolt open after the last round. I couldn't stand taking a shot and "click" so I bought the KAK with LRBHO. It took a bit of work to fit the block to my AERO lower but thats a good thing. Better too big then too small and it now fits perfectly snug. Since the lowers magazine catch is what holds the block in, I could actually use it without the top screw (in case I lost it) as the only time it would be unsupported is the 1/2 second you release a 9mm mag and since its a snug fit, the block isn't going anywhere. First time I used the block I fired a 300 round assortment of Remington 115gr FMJ, S&B 115gr FMJ, Winchester "Forged" 115gr FMJ (Win Forged is garbage) and even steel cased Wolf 115gr and Tula 115gr. Every round was flawless and the bolt stayed open on the last round EVERY TIME! I ran a swab down the barrel and the next day shot 350 rounds (250 rounds of Rem 115gr FMJ and 100 rounds of steel cased Tula 115gr) FLAWLESS! I love the LRBHO because you can hear the difference when you fire the last shot. You know the guns empty and you see the empty chamber. This "bottom load" mag from KAK is 100% the way to go, it is AWESOME! My setup is AERO lower, DPMS "slick side" .223 upper, KVP "ramped" 9mm bolt, KVP 9mm barrel and KVP 7.5 Stainless Steel 9mm buffer

Little fitting required, put 150 rounds down range with no problem. Love the way it worked out . Thanks for a quality part that works perfectly.

I picked this up for my 9mm build . Slid in Snugly yet perfectly to my Andersen lower . I’ve yet to fire the weapon , however , it’s seated my 10 round ASC magazines beautifully . Pending any issues, which I don’t foresee , I will update my review . Thank you for a quality piece !

The quality of this adaptor is far superior then the others. The last round bolt open functions perfectly. Only complaint is I had to bend the ejector slightly towards the bolt due to it not ejecting completely and cause if jams. After I bent it my pistol functioned perfectly 10/10. Ran 200 rounds through it rapid fire without any jamming. I strongly recomend this adaptor

Customer service was outstanding. Had some issues with delivery, they got it worked out fast. Really appreciate the support. New Unit arrived. Installation in MIL spec lower was very tight. Installation required standing and polishing of the adapter. Was not as drop-in as i would have liked. Will likely abandon and go to a dedicated lower. Nonethesless, for conversion part, its ok. I would recommend dedicated lower for new builds but if you have spare lower, its a nice add-on for a 9mm conversion.