Phase 5 ar10 extended bolt release v2 - Phase 5 Weapon Systems Inc Extended Bolt Release V2

First of all, I like Phase 5 products. I have three of this type of bolt release on my AR15s. I’m building my first AR10, so I went with this same type of bolt release! I went with the simple black version, but this is where I would rethink that choice in the future. The black finish (I’m not an expert in various finishes) was very “powdery” and rubbed off quite easily on my cleaning towel. I used Shooter Lube cleaner to wipe it off and the results were acceptable. Next time, I’ll go with a color that has a different type of finish like the other models I have. Now here is where my problem is with this product and it is NOT the fault of the product! I chose a Juggernaut JT-10 stripped upper and lower and started from there. The JT-10 is a quality product and is best suited for states that are not as stupid as CA with their draconian laws, as most of a normal build would go without any issues. That said, the lower receiver is built very strongly with reinforcement bosses built in (all over the place, but I didn’t see the potential issues when I bought it). It is one of these reinforcement bosses that get in the way of the travel of the Phase 5 actuating arm and don’t allow the product to function at all! So the options are to dremel away the offending boss to get the proper range of motion, cut off the actuating arm at the “5” logo, return the item and go with a different bolt catch. I’m going to keep it for now, but I did go with another bolt catch and may take my dremel to this product later. The four stars are for the finish and not the design.