Excellent recoil reduction. - OpticsPlanet Exclusive Maxim Defense Industries RDB Roller Delayed Blowback System

I've only shot one 2gun match and one range day with this since I installed it. Installation of the buffer was easy with the only difficulty being driving out the roll pin in my bolt to remove the weight. For testing I ran 112 rounds of a mix of 124gr AAC and Belom along with a 33rd mag that I loaded with random range pickup rounds and had no malfunctions other than a few of the range trash rounds failed to fire which is expected with rounds picked up off the ground. I noticed very little if any noticeable difference to the felt rearward recoil but that was already very minimal in a 16" PCC that was NOT built to be light. Where this really shined was the forward motion of the bolt returning to battery which was much less jarring and had my dot falling right back on target where previously I had noticed a tendency to drive down from the heavy bolt slamming forward. In my match I was easily able to run a plate rack with basically no vertical correction to aim and I had no malfunctions (104 rounds of 124gr AAC). The only downside is that this greatly increases the force needed to run the charging handle. The additional force is really only present for the very first part of pulling the handle back while the roller delay is engaged and is honestly not really noticeable under pressure when I did mag change drills but I could easily see it causing some difficulty if you're using a small charging handle or trying to run the handle in an awkward position with poor leverage. It gave me a moment of pause the first time I pulled it because the gun felt jammed but once I knew it was going to happen it only ever bothered me when doing my usual "make ready" routine because I'm usually trying to make slow and measured movements to avoid fumbling anything and getting DQ'd by doing something silly like flagging a foot or hand and this needs a sharper pull to charge the gun. Overall I'd say that it's a noticeable upgrade for a competitive shooter, probably not for a defensive or range gun. Probably not worth it for a new build versus getting something more purpose designed but if you're looking for something to help improve an existing build then I think it's a good improvement at a fair price. I'm looking forward to doing a side by side of this in my 16" competition PCC and my other 8" AR-9 SBR, especially with a suppressor mounted if that ever gets released from jail.