Thomas G from United States, TX Public Profile

So as the title states, this is possibly the best bolt release/ambi release there is for the AR10 platform. You are even able to use it as an ambi bolt catch when you are attempting to lock the bolt to rear without too much hassle. Even if you are locking the bolt to the rear the traditional way, this item still makes it a breeze bc it gives you a lot more surface area to push on. Short of actually trying to break it, it feels pretty solid and durable. The "catch" internal material is beefy so no worries there. The only personal issue I have with it is I wish it had a slicker feel. It has a chalky almost abrasive finish on it. It's definitely grippy but I feel this part could have been given a smoother finish. Overall though a really great product.

I would like to start by stating that this is a solid AR10 LPK for the money. There are only a few issues/gripes I have. First, as the title states, I've bought 2 of these LPKs. The first was a lerfect fit for my Aero M5 stripped upper and lower. The only gripe I have with that build was that the pivot pins do not protrude enough to make the break down of the rifle completely "toolless". The second LPK went on an M5 upper and a Radical Firearms 308 lower. The bolt catch/release that came in that pack was a completely different design. It still "fit" in the lower but it was bigger and bulkier. So much so that it did not have enough clearance for the bolt catch to pivot upward enough to catch the bolt. It would simply just hit the inside frame of the upper. I should have taken a picture beforehand but i had to remove quite a bit of material with a belt grinder and a file to make it functional. I was thinking of replacing it anyway with a Phase 5 bolt catch but now I definitely am and sooner rather than later. Just upset at the huge design difference that made my rifle not completely functional after spending so much time and money piecing it together. I'm sure the manufacturer would have tried to make it right but I didn't feel like dealing with the back and forth.

So I bought this buffer in early 2021 when this company still used a orange/copper colored finish on the buffer. As you can see it's now advertised with a black finish. Not sure what else, if anything, has changed with this buffer since I bought mine but initially it looked and seemed fine. After a little more than 100, maybe 200 rounds at most, the buffer retaining pin has dug a groove into the buffer removing not only the finish but also the metal. I assume at the time I bought mine they were made from the same 6061-T6 aluminum they're currently made from, which is why they're so budget friendly. I wouldn't recommend this buffer for anything more than a few mags at the range every few months, maybe twice a year at most. If you plan to really use your rifle, spend a little more and getting something that will for sure hold up better to even just normal/moderate use.

I opted for the 22" 6.5 creedmoor barrel for my AR10 build and it was worth every penny. It's definitely not the most expensive barrel but it is not a budget barrel either. The quality of the barrel I received was very good. No tooling marks in the chamber or feed ramps, no scratching or marring inside or out. The rifling had very solid looking lands and grooves as well. I know the question most are wanting answered is regarding the accuracy. I'd have to stack this barrel's accuracy up against my Browning Xbolt Max LR in 6.5 creedmoor. With my Xbolt, I'm getting 1/3 MOA. This Criterion barrel produced 3/4 to 1/2 MOA using Hornady Black 140 gr BTHP. I'm more than happy with how this barrel has preformed and again will say it's well worth the money spent.

So I've bought 2 of these triggers But one ended up failing. One is still working flawlessly but with a way lower round count, may be 400 or so. The other has had a 1000 round count or higher and ended up failing. The trigger developed some wiggle and play in the trigger. While on safe if you pressed or pulled the trigger like you forgot it was on safe and tried to fire it and then switched the safety to fire, without touching the trigger it would automatically drop the hammer just switching to fire. Sometimes it would be a full drop of the hammer and others it would be a weird partial drop. The trigger would still fire a round but you would occasionally have negligent discharges just switching to fire with a round chambered. I sent rise armament an email explaining what I've said here and without hesitation they offered to replace the trigger using their warranty and I got the new trigger within 2 weeks from sending mine to them. The other trigger That I have had has not developed any of these issues and I hope it's days solid. The new trigger I received in the other original one with the low round count both fuel equal as far as no play within the trigger and no accidental hammer drops switching to fire. Rise armament made it right which is why I'll give them, or this trigger anyway, a 4 star because when it works it works great. I would not hesitate to buy another.