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Most Helpful Positive Review
Rock River 450 FTW!
Dunno what the deal was with the 1 star review I saw the other guy submit. I have had zero malfunctions out of about 80-100rds. Running it on a rifle buffered, ace stocked lower as god intended.
Accuracy has been extremely impressive with the hornady custom 250’s through this chonky boi. Holding a ...
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Most Helpful Negative Review
.450 Rock River A4 uppers
Bought 2 uppers and neither of them cycled so I sent them back and got 2 new Uppers and now they are still doing the same thing. Rounds don't eject and bolt doesn't stay open once mag is empty. I am returning these items because it seems like the quality assurance is not there. I was really hoping f...
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Rock River complete upper in 450 bushmaster
Very pleased with this setup, I didn’t want to piece together my next build I found this and bought it. Put it on one of my lowers and slapped my red dot on it cleaned it and then took it out to my shooting range, unit performed flawlessly and the trigger is alot better than I expected. I would reccomend.
Would recommend: Yes
1 of 1 found the following review helpful.
450 BM upper receiver
Great upper. Haven't fired it yet but will this weekend. I can't say enough good about Optics Planet. They shipped this fast so it would get to Colorado before our communist tax bill went through. The 2A community is absolutely amazing.
Pros:
- It's a Rock River Arms. Quality is always over the top.
Cons:
- None yet.
Best Used for:
- AR-15 lower receivers.
Would recommend: Yes
0 of 2 found the following review helpful.
This upper won’t cycle
I’m having issues with mine cycling the has block is aligned right I don’t know what to do it is very accurate but don’t cycle
Would recommend: No
1 of 6 found the following review helpful.
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