Century Arms MKE AP5-P....buy it or you will regret it later.

[Bret]

I don’t really know much about this (dumb) 922r stuff. Those 3 parts were changed from the standard factory set up?

Well, there wasn't a stock to begin with. 922(r) doesn't apply to pistols, only rifles and shotguns. When making an SBR, the ATF says that you also have to comply with 922(r). The original handguard didn't have the vertical grip, but I thought that it would be good to have considering the limited amount of space to grip it. The replacement charging handle looks just like the original.

Not really, unless Choate is just selling China crap these days. Mine locks up tight in the open position and zero wobble on the double pins. I don't need to tap them in with a hammer like some of my rifles, but there is zero wobble.

But I have to wonder which one is out of spec, the stock or the MKE receiver.

The holes in the receiver are tight to the pins. So, unless the holes in the receiver are undersized and the pins are undersized, it's the Choate stock. What's the H&K spec for the diameter of the pins at the rear of the receiver?

[SteyrAUG]

The holes in the receiver are tight to the pins. So, unless the holes in the receiver are undersized and the pins are undersized, it's the Choate stock. What's the H&K spec for the diameter of the pins at the rear of the receiver?

Don't know the spec off the top of my head. But assuming the MKE pins are same as German, it would almost have to be the Choate stock which is out of spec. Interestingly enough I used a Choate stock on the second batch of MKEs that came in as 94Ks with no problems.

It's possible MKE recently changed the spec so that their stocks work better than ones spec'd for German guns, but that's just one of many possibilities.

The easiest way to figure it out one way or another is to grab a couple German push pins (you can never have to many) and then test fit them in the stock and receiver.

[Bret]

I'll grab a couple of push pins the next time that I place an order. Meanwhile, if anyone can measure the diameter that would be great.

[Vegas]

Well, there wasn't a stock to begin with. 922(r) doesn't apply to pistols, only rifles and shotguns. When making an SBR, the ATF says that you also have to comply with 922(r). The original handguard didn't have the vertical grip, but I thought that it would be good to have considering the limited amount of space to grip it. The replacement charging handle looks just like the original.

Thanks. I appreciate the explanation. I have an AP5-P sitting in my cart currently

[The Dumb Gun Collector]

Although ATF may have recently abandoned that since they say the braced pistol SBRs do not need to comply with 922r. Honestly, I wouldn't worry about it unless I was a manufacturer. Just my personal opinion.

a person with an imported pistol that was subsequently equipped with a “stabilizing brace” will have the same options as anyone else under the final rule. Should that person choose to register the firearm, no further modification of the firearm with domestic parts is required.

[Bret]

Although ATF may have recently abandoned that since they say the braced pistol SBRs do not need to comply with 922r.

This isn't what they said. They said that 922(r) regulates assembly, which is correct. Since the firearms were assembled by someone else, they said you don't have to worry about 922(r) as you're not the one who assembled them. This is also correct. To put all of this another way, there is no such thing as a 922(r) compliant rifle or shotgun. There is only 922(r) compliant assembly. You can purchase a rifle that was assembled by someone else in violation of 922(r) and it's perfectly legal to possess.

[The Dumb Gun Collector]

Well, it seems they are saying that a gun that was imported as a pistol that subsequently was turned into an SBR by attaching brace will not need to add any domestic parts. Sounds good to me.

[Bret]

Well, it seems they are saying that a gun that was imported as a pistol that subsequently was turned into an SBR by attaching brace will not need to add any domestic parts. Sounds good to me.

That's true in the case of the amnesty registered braced pistols, but don't extrapolate that to mean that 922(r) doesn't apply to making SBR's out of pistols in general.

Back to the main topic, I put 150rds of Geco 124gr FMJ through my AP5-P today using a US made Overwatch Precision magazine. It ran 100%. The rifle was surprisingly soft shooting. I'm very pleased. Like you said, buy one or you will regret it later.

[extremist]

That's true in the case of the amnesty registered braced pistols, but don't extrapolate that to mean that 922(r) doesn't apply to making SBR's out of pistols in general.

Back to the main topic, I put 150rds of Geco 124gr FMJ through my AP5-P today using a US made Overwatch Precision magazine. It ran 100%. The rifle was surprisingly soft shooting. I'm very pleased. Like you said, buy one or you will regret it later.

Are the Overwatch mags better than the AC Unity mags? Bad experience with those.

[Bret]

I've never tried the AC Unity mags, so I have no way of knowing. I bought two of the Overwatch Precision mags for 922(r) compliance. They were only $30 each, so not a big investment. Based on my experience with polymer magazines of the past 30+ years, I'd say that they appear very well built. I'll try them in my POF MP5 and MKE AP5 and will let you know how they do.