Talk to me about the glock magazine 9mm Olympic AR15

from what I understand all of the glock style 9mms are very hit or miss with reliability to include olympic and lone wolf(I think). the colt style ARs normally function well enough but are very picky about magazines. I have a model 1 sales AR15(home build on a DPMS lower receiver with 9mm magazine adapter block) that does very well with colt and metal form magazines and so far has had no issues with a promag 10 rounder I just bought but it's too early for me to say with certainty that it's reliable.
model 1 sales is not held in high regard so you will probably have to just take the leap with whoever you choose and hope that it works.

I spent nearly a year trying to figure out why my AR wouldn't function(lots of stovepipes) and nobody ventured beyond the fact that it's a model 1 build and finally as a last ditch effort I bought a metal form magazine and it's functioned 100% ever since unless I switch back to the other 3 magazines that I had at the time so I know with certainty that it is just a problem with mags.

in response to your questions of maintenance it is no different than cleaning a 223 or other caliber AR15. takedown is all the same as other AR15s. mine is just short of MOA at 100 yards but accuracy drops off fast past 150 yards due to low velocity.

here's a picture of my 9mm AR with a 32 round metal form magazine

agreed. now that 122112 is gone and the last known apocalypse scare of our age is finally done and over with I see no reason to plan for a zombie apocalypse and if I do need to fight my way out of a bad situation then I have a 223 AR for that, the 9mm is solely a fun gun with MAYBE and that's a big maybe, possibly used for hunting if I ever get drawn for a spare doe tag. so far all this has killed is paper, fence posts and the occasional tweety bird.

Based on my research and lust for a 9mm AR, I'm leaning towards the CMMG or Yankee Hill uppers using Colt-style magazines.

No experience with the Glock mag carbine, but I bought a Rock River LAR-9 a few years ago and while it was initially stiff, it has been generally problem free. Liberal application of lube and get to shooting.

I use the modified Uzi mags, and the RR has a dedicated lower so no magazine block to fiddle with.

Loads are cast 9mm over Bullseye and mixed brass...I just use my pistol load and it shoots great. I zero at 50 yards, and my 5 year old has no problem whacking clays with the EOtech on top. Carbine is blowback operated, so no gas port to worry about filling up with lead. There is a faux gas block on the rifle, and I contemplated removing it, but I liked the stepped appearance from rail, to gas block, to barrel. Furniture is Magpul UDE, sold by Larue.

IMHO, it's a urban SD rifle...No need for a longer zero or any BDC to shoot the longer distances. I've plinked at 200y with it, and it gets close enough, but any further than that and I'll grab a real rifle. I chose the EOtech because it meets those requirements perfectly. EOtech is mounted on a Larue QD mount.

Maintenance is normal for the AR.....solvent, brush, rag and lube. Nothing special, although I do have to scrape the brake clean occasionally.

Honestly, it's the one AR type that I introduce new shooters with. Less muzzle blast than the 223 and it's light weight are easy to deal with.

I will mention this....magazines (32 round ones) are ridiculously difficult to load. I was lining up cartridges on my tailgate and pushing the magazine down to stuff them in. Then I found my brain and bought a 9mm SMG LULA tool. No problems since.

Be prepared for some serious ammo usage. I go through easily a couple hundred rounds every time I touch it. At 32 rounds a mag, it adds up quick.

Here she is:

I've got the Olympic .40S&W AR that takes modified Glock mags. Its marked LEO and appears to have been build during the ban.

Mine works well, even with the Korean 32 rounders. Modifying the mags is a bit of a PITA but the mag well block comes out easily and serves as a template to mark where you have to cut for the mag catch.

Mags don't drop free, my only real complaint besides some non standard mods to the lower and upper.

Satisfying "thump" when the 180gr slugs hit the backstop. I shoot mostly hard cast reloads since its a blowback with no gas system to foul.

Wouldn't be my first choice for a firefight, but its a lot of fun to shoot.

Be prepared for some serious ammo usage. I go through easily a couple hundred rounds every time I touch it. At 32 rounds a mag, it adds up quick.

Click to expand...

this is precisely why I just bought a ten rounder....more reloading time, less time burning through my stockpiles.

I use sten mags with my Olympic 9mm upper. I bought a mag block, I think it was called a Socom block. Anyway, I used it to shoot plates in pistol and carbine class. Mine works great.

I probably put at least 1/2 a pallet of steel case ammo through it over the time I have had it. I could hit plates easily out to 100 yds, although sometimes it didn't have enough power to knock the heavier ones down at that range.

I bought a bunch of sten mags for 6 bucks ea at the Knob Creek shoot about 15 years ago, and a mag loader which is a necessity.

Ammo is too expensive for me to have that kind of fun these days, but I still have the upper and enjoy shooting it from time to time.

I don't know about the glock mag adapter, but if you can find one of the mag blocks and pick up a dozen sten mags, it could be an option for you if glock mags become unobtainable.

RW, is that just the upper or a complete rifle? Mine was an upper only and I had loads of trouble getting it to re-set the hammer until I replaced the entire trigger assembly.

Mine drops a lot of fouling in the receiver but the barrel keeps surprisingly clean. Unlike a .223 AR, it never gets hot. It's not a precision rifle, at least mine isn't. But I don't have MOA expectations.

Lots of fun, cheap to shoot and may increase your desire for a suppressor. I agree with a mag loader too. Loading mags by hand may decrease your will to live.

Awesome. Glad it's living up to your expectations.

What mods are you going to make?

Nice buy.
I had the A2 Sten gun magazine version of the Oly, super reliable.

What's neat about the AR 9mm's is they seem to have far less recoil than the Ruger PC9 or Marlin Camp.

Handloads? No change from your pistol loads. Just no super weak loads that might lodge a bullet or jacket in the bore, especially with JHPs. 1200 fps with a 147 is solid power.