The Sylvan Arms 9mm Glock Conversion Block is a drop-in fit to give you a 9mm capable lower without resorting to buying a pistol caliber-specific option. Designed to install in Mil-Spec lowers almost exactly like a standard rifle magazine.
- Easy to install and swap out
- Accepts popular Glock 9mm magazines
- Designed to work with Mil-Spec lowers
- Does NOT include last round bolt hold open
Product Details
- Material: Steel and 6061-T6 Aluminum
- Finish: Black Anodized
- Weight: 4.2 oz.
Designed, built and assembled in the USA
100% Satisfaction Guarantee
Limited Lifetime Warranty
Check it out in action: Sylvan Arms 9mm Glock Conversion Block
If you have any questions, please contact us before ordering.
Install Video:Â
| Condition | NEW, Blemished |
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Janz –
I’ve used dedicated glock-mag lowers from QC10, PSA, and New Frontier and have also install the TorkMag adapter so I’ve been around the block a bit with small-frame Glock use in AR form factor. I saw Primary Arms had a unit on sale and picked one up to test out. Frankly I was expecting at least some fussiness, however, this conversion block ran flawlessly with the 9mm upper I took out to test it with. Not one malfunction at all.
Ran 115gr bulk Remington, some Federal bulk 115gr, some Blazer 147gr, and some PPU 147gr JHP. All worked w/o issue.
Getting used to the position of the magazine release was a bit awkward (dedicated lowers and the TM kit all use the standard mag-release location), however, grabbing the mag and pulling the release with the off-hand index finger was easy to get used to. Mags do not drop free (at least in the one I picked up).
I have to say I’m very pleased with this unit and have recommended it to my gun-owning friends that were looking into a glock-mag-fed 9mm AR, but didn’t want to buy a new dedicated lower (or mess with having to modify your mags like the TorkMag unit).
Darryl –
It works well, but man is it tight to get in and the after market mags I am using are also a very tight fit. Just a hair more room would be great.
Bill D (verified owner) –
I’ve shot about 500 rounds through my 9mm build, not a single malfunction. Ive used Glock, KCI and ETS with no issues. All mags fed and ejected normally. Hope you guys make one for the M&P9/40.
Stan –
This unit is AWESOME!!!! I have two of them in different manufacturers lowers and they have been 100% in both lowers. Shot hollow point, fmg, flat point and they all have functioned perfectly. The ETS mags drop freely, the only ones that are a little tight are the factory Glock mags. I like the ETS mags better anyway.
RtoR –
I purchased this to convert a 556 AR lower to 9mm. Works fantastic. Put 9mm barrel on an old 556 upper and added a $109 TRYBE Defense Milspec 9mm BCG and it simply works perfect. Barrel $139. This mag-well conversion and $109 BCG and I have a 9mm AR from an old 556 setup.
Charles Dearth –
High quality piece. Slides freely into Superior Arms lower, very light resistance in my 17 Design Multi Cal. lower. 27 round promag ran flawlessly. I am very impressed. I love the mag release.
Captain –
Works great in my Colt M16 and Palmetto State Armory lowers. Fit & Finish very nice, easy to install & remove, runs flawlessly in Full Auto & Semi, used Glock 19 & 33 round mags. Very happy and highly recommend.
Curt Mills (verified owner) –
Better than sliced bread. Great fit. Carefully read instructions. Dug thru my 20 lbs.of hex keys. Found one! Installed the block. Tried 26 mag — almost, but no cigar. (I have two 17/19 mags coming) . However the 26 mag would cycle if I held it in (just to prove the block would function)(slid right in and out very smoothly tho). Went back inside, reread instruction and found the enclosed hex key. I highly recommend. Lrbho not an issue for me. Getting very close to having a “street legal” Ca AR 9. Thank you very much!
Curt Mills (verified owner) –
This is the one to have. No lrbho, but not an issue for me. Works perfectly . My motto: an AR in every caliber. Wish Sylvan made one in 45acp. Maybe next week.