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Pro Mag AR-15 / M16 9MM Magazine Adapter Block For Colt 9mm SMG Magazines, Quick Change
$72.99
$56.89
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Expert Review
Works perfectly
I am running this in a 7" barrel pistol build, it went in well (just make sure it doesn't get caught on the mag catch during install) and comes out relatively easily. Magazines fit snugly but are smooth to engage and remove. However I would recommend avoiding the ProMag steel magazines, they required sanding due to the gritty coating on the magazine and failed to feed properly for the first 4 rounds every time. Swapped over to MetalForm magazines, and have not had a single issue since.
Most Helpful Positive Review
They all laughed
They all laughed!... " you're using the Pro Mag Block?"... Well, let me tell ya, this 9mm well block is performing flawlessly. The new design installed in a snap and all my mags fit perfectly. I've been using this build for Static Steel, IDPA and USPSA matches and general loads tests and haven't had...
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Most Helpful Negative Review
It's mostly plastic
I had purchased this product due to the favorable reviews and figured it would be a good product to use. I was wrong.
After doing an initial function test, my second trip to the range was to sight in my optic. In all, less than 40 rounds were fired with the adapter installed. Upon doing the usua...
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LRBHO broke
This seemed like a fine product up until the surface that interfaces with the magazine follower just broke off. Ironic given it's one of the only metal parts on this product. This is after only a hundred or so rounds mind you.
Would recommend: No
Pro mag colt magazine adapter
This adapter gets the job done. It’s probably not as nice as some of the metal ones but it does what it’s supposed to do. Feed ramp is kinda eh but for the price it’s a decent choice.
Would recommend: Yes
Broken bho activator
This unit worked fine for the first couple of mags. On the 3rd or 4th mag, the cheap pot metal bolt hold open actuator snapped off when inserting a new mag. I do not recommend this product. Spend the extra 15 bucks for a good one.
Pros:
- EASY INSTALL
Cons:
- None
Would recommend: No
holds 50rd drum no problem
I chose this bc I don’t like the angle of Glock mags on AR9’s. No last round hold open.
Would recommend: Yes
last round bolt open broke
I shot one mag with 115 gr and the last round bolt open catch broke and not it won hold open
Its still run fine no other malfunction just wont open on last round
Its still run fine no other malfunction just wont open on last round
Would recommend: No
0 of 1 found the following review helpful.
Works but last round bolt hold open tab broke
If you are building a PCC and starting from scratch, I would recommend using a dedicated AR9 lower. But if you have a AR15 lower and looking to build a 9mm PCC this will work but you get what you pay for. The LRBHO tab broke after 1st spent magazine. I ran about 140 rounds thru with no failure to feed or other catastrophic issues, using round nose FMJ. Colt metal metalform mag catches and releases with no issues. Works good for the price
Pros:
- Price
Cons:
- Cheap
Best Used for:
- AR15 to AR9 conversion
Would recommend: No
Promag 9mm adapter
The adapter fits well, fed well, but when I went to insert a second magazine the bolt catch broke..other then that it functions decent
Pros:
- None
Cons:
- Broken after 1 magazine
Best Used for:
- paper weight
Would recommend: No
Promag AR15 to 9 mm unusable
During installation the adapter buckled because it was too large. It was impossible to remove without destroying the adapter to save my lower which was a Colt M4. I can not recommend this produce.
Pros:
- None
Cons:
- Poorest quality
Best Used for:
- paper weight
Would recommend: No
Heave the warnings
God awful product, was broken before it got to me, just spend the money on a kak block. When installed it was loose and janky is the word that comes to mind. These are hit and miss. Some are great most are garbage. I wouldn't waste the time or effort again.
Pros:
- None
Cons:
- everything
Best Used for:
- Landfill filling
Would recommend: No
1 of 2 found the following review helpful.
Worked, no issues
This product worked as described. I chose this over the brands because I live in a state where we cannot have detachable magazines. Since this adapter uses the same mag release as my AR, I remain in compliance. My only gripe is the difficulty to remove it to switch calibers.
Pros:
- works, cheap
- CA Compliance
Cons:
- difficulty removing
Would recommend: Yes
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