What Mag Block for a 9mm AR Using Colt mags?

Howard Law

boss_hawg

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I've used a promag which sucked and I've used a Hahn Precision which is awesome in every way except for the cost.
 

Willy Leadwell

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I've used a promag which sucked and I've used a Hahn Precision which is awesome in every way except for the cost.
I found that a good mag block just didn't make sense when compared to the cost of a dedicated 9mm lower. Plus they just look better IMO.
 

boss_hawg

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I found that a good mag block just didn't make sense when compared to the cost of a dedicated 9mm lower. Plus they just look better IMO.

Agreed. Dedicated is the way to go cost-wise if it's a single purpose build. With the Hahn block, I could theoretically change over to another caliber with a simple mag block and buffer switch out.
 

Willy Leadwell

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Agreed. Dedicated is the way to go cost-wise if it's a single purpose build. With the Hahn block, I could theoretically change over to another caliber with a simple mag block and buffer switch out.
That's good if you only want to SBR one lower and may switch to another caliber later. I just made the decision that if I wanted another caliber later I'd just pay for another stamp and wait.
 
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becausefu

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Dedicated Glock mag lowers are bullshit. They look retarded as fuck with the mag poking backwards.

With a straight up and down mag insertion like the ORIGINAL Colt gun uses means that there is no difference in mag insertion with a 9mm or a standard AR mag.

Using a dedicated Glock lower means you have to learn new techniques when changing mags.
 

dial1911

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I've got a PSA AR-9 that I bought as a kit. Paired that up with an Anderson lower and it's been 100% reliable through a few hundred rounds... I wouldn't call that a really great test, but it's all I've shot so far. I have not had a failure to feed or eject yet.

And I noticed that they have the mag well blocks for about fifty bucks right now- really good deal.

I will say that mine rattles a little in the AR lower mag well. Maybe some play is required for reliable feeding- or maybe it's just sloppy. Anyway, there is a little rattle but I've not had any problems yet. Oh- and I've only used the PSA mag. Have not tried any converted UZI or other Colt pattern mags.



Now to play devil's advocate... I bought a NFA (New Frontier, not tax stamp) Glock 9mm lower from @DoglegArms and I'm impressed with the machining. If you happen to already have a bunch of G18/G17 mags, I'd go that route over the mag well block. After I get the NFA lower done and on a pistol, I'm pretty sure I'll sell off the PSA mag well block/mag.
 
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dial1911

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Dedicated Glock mag lowers are bullshit. They look retarded as fuck with the mag poking backwards.

With a straight up and down mag insertion like the ORIGINAL Colt gun uses means that there is no difference in mag insertion with a 9mm or a standard AR mag.

Using a dedicated Glock lower means you have to learn new techniques when changing mags.


:) And then there's this...
 
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boss_hawg

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I'm not ready to totally poo-poo the Glock mag lowers just yet. I agree that it does "look" ridiculous but if it works then I can't argue.

I went with a colt mag setup even though I own a G17 and several 33 round G18 mags.
 

NWS

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Hahn bottom load. It is what I have.
 

Strider12

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Top loader requires removal of bolt catch for install. My lower is SBR, I don't want to risk fucking it up.
Makes sense. The lower I'm using is getting a stamp.

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