A California Gun Owner from United States, CA Public Profile

I got this trigger for my Aero Precision M4E1 lower receiver. It fits right in with no issue, and installation is incredibly easy. I've only ever used the standard triggers that came on an M4 and a S&W MP15, so this was a welcome improvement. Nice and light trigger pull, perfect for my use, and not too expensive.

It does have a bible passage numbered on the hammer and in the packaging, which may or may not bother you depending on your beliefs; I'm not a Christian myself, but it doesn't bother me much since its on a part you won't see often and it is just a really pleasant trigger regardless.

It is most definitely a bolt catch spring. Very useful for replacing bolt catch springs that you may or may not have launched across the room while assembling your lower. I would absolutely recommend this bolt catch spring.

This parts kit for an M4E1 receiver has almost everything it needs, with good Aero quality. It was missing the bolt catch spring (had to double check that I didn’t drop it when I opened the bag). Apart from that, it’s a good option if you already have a trigger or are buying a different one.

Let me be upfront with this one: this thing is LOUD. When I fired it at the range, everyone stopped and stared. It is actually absurd how loud this thing will make your gun. I wouldn't have bought it if California didn't ban flash hiders. Still, since I have it, I have to say I really like the performance on this piece. Recoil is minimal, the flash - while not hidden - is negligible, and it makes my AR so much fun to shoot. On top of that, it isn't nearly as expensive as some other muzzle brakes and compensators. While YHM isn't the biggest name in gun parts, if this thing is anything to go by, they sure do an amazing job.

In preparation for upcoming CA laws banning the "bullet button," I opted to make a featureless rifle out of my Sport 2 AR-15 rather than install a mag lock requiring me to detach the upper receiver to simply reload the rifle. With the removal of my pistol grip and installation of my Hammerhead (non-pistol) grip, however, all of the fingers on my right hand are now restricted to the right side of my rifle. That's where this part comes in handy. I no longer have to reach all the way around the rifle to engage the safety, all I need now is a flick of my thumb. That means there's one less step to put the gun in "safe" mode, meaning it's much simpler and much safer. I would of course recommend this product to any others building a featureless AR-15, or even people who share or rent their ARs and need to account for both left and right-handed shooters.

My one complaint is as follows: the item took over a month from the time my order was placed to when it was actually delivered. I believe that OpticsPlanet does not normally have this product on hand and orders direct from the vendor. In my case that was okay as I don't use my rifle every day, however, others might find this to be quite an inconvenience.