Designed for the professional with a dedicated 9mm weapon system. The standard 5.56mm bolt hold open is utilized because of its superior strength over the 9mm version. The adapter can only be removed at the Armorer's level once installed. Holds open on last round with Colt type magazines. Colt pattern system.
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The actual product itself is top-notch. Clean machining, fits tight in a Palmetto State lower with minimal (<1mm) wiggling. Unlike other blocks it's designed to take advantage of the existing AR bolt catch as well as the mag release to keep it anchored in place at the top while it rests on the bottom of the magwell like any other top-loading block. This makes it all but impossible to remove by accident, which is nice.
This isn't going to be the magwell block for quick changes of caliber in the field. It requires the removal of the bolt catch roll pin to install and uninstall, which anyone who has built an AR knows is probably the most frustrating part of assembling a lower and the highest probability to damage the finish. Hence the disclaimer that removal should be done "at the professional level." If you get this, you must have the correct roll-pin punch, and I highly suggest a vise.
No need to buy any other 9mm magwell block. This product functions flawlessly with mags from multiple manufacturers. Just remember this is a dedicated block so removing it to swap calibers is a pain. So make sure you have a lower to dedicate this too.
HAHN PRECISION DEDICATED 9MM MAGWELL BLOCK
I purchased a 9 mm dedicated Magwell block, by HAHN, after I tried several others
and Kurt at KAK industries told me about the Hahn and how well it work for him.
My first experience with the Hahn on my 9 mm not a happy one , because a operator error.
I found with this Meg will block and my 9 mm upper then I had to run the upper really wet for a breaking period.
I have found that after doing this that I am very very satisfied with the product, the Hahn Magwell is very well made and I see the value in it, I am going to get a pistol top and then I'll have both, after I get the pistol lower cleared threw the state, Gary
I decided to purchase this mag block as a last ditch effort to save my 9mm AR build. I had mixed success with another adapter, but it started moving after a few mags worth. The Hahn Precision Dedicated Magwell Block eliminated any movement and the need for any guesswork as to how to position it in the lower. Simply drive the bolt catch roll pin out far enough to remove the bolt catch, install the magwell block, and reinstall the bolt catch. I was able to run mag after mag of 115 gr FMJ, and even 147 gr JHP without any issues. If you want your 9mm AR to run, buy the Hahn Precision Dedicated 9mm Magwell Block from 9mmar.com. Great product from a retailer with superior customer service.
Number One Recommended Magwell Block, Built like a Rock, nothing else can beat it, if you want to built Dedicated AR 9mm, this is what you need: "The Precision Dedicated 9mm MagWell Block". Two Thumbs Up...
Perfect fit and function!! Couldn't ask for more!
i really really like this mag well. easy to install, work great. i am not worried about switching back and forth.