Chris from United States, NY Public Profile

Dropped this into the bolt on the AR-10 and I was initially skeptical, I fired about 60 rounds with it and didn't really notice much aside from a slightly different ejection angle (tad higher and more consistently placing cases in a smaller spot on the ground). When I cleaned my gun up, I dropped the factory cam pin back in and compared cycling (just by moving the bolt carrier by hand) and it was noticeably easier to pull out of battery and through the bolt stroke with the Roller Cam. From anywhere I've looked POF doesn't claim this as an attribute, but its pretty clear that it does move easier. Hard to argue with its intended claim though, its better to roll than slide...well, most times anyway...LOL!

Well made and packaged, mounted very easy and fit excellent, even unpinned it had zero play and took a bit of force (no tools) to turn, held place easy and fit a standard bench block well when pinning and setting the screws. It came fully closed, and has infinite adjustability...but tuned so easy, I will never use an adjustable block with detents again (I don't use suppressors, FYI), you can count on it alone to get the gas right and don't have to fidget with ports, springs or buffers...Highly recommended. The only other thing I can say is the adjustment is on the left side of the gun, not a big issue, but I would've preferred it be on the front or at least on the right as it requires me to remove my rail as the rail slots don't line up with the adjustment screw.

Good quality, I recommend getting 2 though...the barrel nut was so in between mounting holes that I actually needed a few more...I made it
work just by tightening and retightening multiple times. After the next to last seating, I checked on the shims just to make sure they were good for a final clamp down (sometimes the paper-thin ones can get damaged) and they looked excellent...don't hesitate to buy just make sure you get enough.

Good quality, I recommend getting 2 though...the barrel nut was so in between mounting holes that I actually needed a few more...I made it
work just by tightening and retightening multiple times. After the next to last seating, I checked on the shims just to make sure they were good for a final clamp down (sometimes the paper-thin ones can get damaged) and they looked excellent...don't hesitate to buy just make sure you get enough.

Very well built, excellent machining, fasteners are top quality SAE, gets your optic WAY out there if you need it...I purchased the "low" version, measures 1.3" to center as claimed. Was unsure of the thumbscrews, not anymore though, fits rail so closely that "finger tight" is plenty, checked every 20 rnds for a 100 rnd cycle (.308) and never loosened, in fact I thought it was tighter after I was done. Removed, remounted and fired 5 rds with ZERO POI shift. PRI doesnt even claim that it does this, THEY SHOULD. Mine needed no lapping at all, fit and squared up nicely with a 5-25 Burris. After checking for POI shift I removed the optic and the tube was completely unmarred, no marks of any kind. For anything under $200, that is unheard of. May purchase another for a Trijicon 1-8 i've been eyeballing, may be overkill for that though. Its a well built piece, if you need real space for a large optic...Ive not seen better at this price...I waited to long to get one...