The original Lancer Adaptive Magwell sold by LaRue has an advantage over the latest second version because it clamps to receiver magwell tighter. You're able to adjust tension with the two clamp screws compared to the latest second version using a small sticky foam pad. I've owned a Lancer L15 receiver with LaRue custom upper for several years with the same sticky foam pad, but the L15 receiver has a machined groves and stop guides supporting the L15hj adaptive magwell which common AR15 receiver designs don't have. Personal I prefer the original Lancer Adaptive Magwell version sold by LaRue over the latest second edition commonly found on other aftermarket firearm accessory websites. The advantage of all Lancer Magwell Adapters has over typical AR15 magwells is solid aluminum durability, CNC machined quality tolerances, promoting super fast magazine changes without your eyes leaving target sight picture. A few minutes of magazine change practice once a week as usual and you'll develop tremendous muscle memory skills eliminating hostile target visual lost. Nothing is worst in the competitive shooting world when your rushed mag change wedges into the magwell costing you half seconds adjusting magazine body angle full insertion. It doesn't always happen, but every competitive shooter knows what I'm referring to and Lancer Adaptive Magwells completely eliminate those possible issues especially you're ahead of the next fastest shooter by milliseconds. In the beginning using the L15 Madwells I knew it was the way to go over other plastic aftermarket magwell options I've tried and I was really pleased when Lancer offered there new Magwell Adapter for standard designed AR15 Lowers. I've shot Lancer L15 and Lancer Adaptive Magwell custom built LaRue carbines for competitive 2-gun and 3-gun matches and the Lancer Madwell Adapter has been a huge benefit cutting seconds off my overall shooting stage times especially when Match Directors require multi-mag changes or limited round count per magazine. I bring two different custom AR15 set-ups with Lancer Magwells and choose one of two carbines that fits the shooting layout best. Now I have to equip the rest of my AR15 collection with LaRue's original Lancer Adaptive Magwells...!

Yes, I also bought two of these and was very happy to get them from Larue! Thanks for the unexpected and awesome SWAG! The adapters fit well on my DPMS and Bushmaster lowers well not so much on my Rock River.. Iknow mill spec has some tolerances and leway. Gen 3 P mags will not fit because of the mag stops on the back of the magazines and other mags even mill spec. aluminum are hit and miss on whether they will drop free or not