Not worth the price. Clamps bottom of the mags so you cannot use it with rubber mag bottom bumpers, allows coupled mags to be squeezed in the upper part so insertion problems can occur. If you try to modify them by removing inner protrusion to clamp mags higher there is no enough friction clamp and mags slide inside the clamps. Would not buy it again, would recommend friends against purchasing it.

Badly engineered product. Overall quality is fine, but it is hardly usable at all. It cannot be used with rubber magazine bottom bumpers, at it engages the same little hole at the bottom rear of the magazine that the bumper engages to stay in place. When installed it does not support upper portion of the mags that can easily be squeezed together preventing proper mag insertion or bent apart, breaking clamp or one of the mags. I was disappointed and wanted to modify the clamps (I got two) so I could clamp the mags above the rubber bottom bumpers, but as I feared when I removed the inner protrusions that lock in the holes of the mags there is not enough friction to lock the mags and they slide up and down the clamps if pushed harder. OVERALL - A $50 ENGINEERING DISASTER. MAKER SHOULD BE ASHAMED, REWORK THE DESING AND SEND WORKING ITEM TO THE CUSTOMERS THAT HAD BOUGHT IT!!!

Arrived super fast like all my orders from B&T.This is very well made,like all their products...but have to say at first was afraid I was going to break it while putting the 2 mags in.I thought you just "loosened" the bolts and slipped the mags in,retighten and your good to go..when what you need to do is actually take the bolts totally out and use a screwdriver or similar tool to carefully pry it open so mag will slip in...it then locks in the little circle on back of mag.Thats the easy part....if you ever have to change the mags out,you need to pry even harder,and a 3rd hand might help...I figure your not going to be changing out mags unless one goes bad....and will say these fit tighter than a clams ass...maybe I got a bad one,does work,just a pain and thinking a little filing on the protruding piece of plastic on inside might be a simple fix for someone thats going to change out a lot,just didnt want to alter a $50 item just yet,so lock and loaded 2-30's and I'm good to go.

Good Quality as expected through B&T! Two Big Issues: 1) cannot use the bumpers with clamp 2) when right mag is inserted the left mag interferes with wrist

I received my Magazine Clamp and I’m not sure if this is a revised version. It has a tab on the inside that fits into the notch on the back of the magazine. If “locked” into the notch- the Clamp is not flush with the bottom of the magazine. The finish on the Clamp is poorly done. It appears to have scuffs/marks from the injection-molding process. Considering the price- I expect more. I have also tightened the screws but magazines still have some wiggle in the magazines. I’m afraid to over tighten.

It’s not bad, couple things not perfect, the coupler sits the mag close to the telescopic arm from the stock so it can jam it / catches it slightly when closing and potentially opening although with force it shouldn’t be a problem.. then you’re worried about the feed lip though.

It does it's job but it's pricey for such a simple device.

Excellent product, buy with confidence. Quick shipping and great customer service