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10/31/2025 10:03:36 AM EDT
I have a spare Spike's 9mm Glock lower with a Strike Industries 1913 adapter on it instead of a buffer tube. Is it compatible at all with a Jakl 9mm upper? What else would I need to do/change out to make it compatible?
10/31/2025 10:28:48 AM EDT
[Last Edit: d16man][Edited] [#1]
I dont think so.  Jakl uses scorpion mags.  Have a friend that tried to use a different upper and it wouldn't work.  PSA's AR-V /Jakl upper is proprietary as is their lower.
"Some people have issues. Sounds like he signed up for an entire subscription." ~Brohawk
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Arfcom St Jude Mafia 3 years
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10/31/2025 10:50:54 AM EDT
[#2]
I have the same lower.  I put a Matador Arms roller delayed. upper on it.  Runs great - very flat shooting.  LRBHO works great.
11/3/2025 10:00:42 AM EDT
[#3]
Originally Posted By GreatDane:
I have a spare Spike's 9mm Glock lower with a Strike Industries 1913 adapter on it instead of a buffer tube. Is it compatible at all with a Jakl 9mm upper? What else would I need to do/change out to make it compatible?
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The JAKL would not work with your Spike's lower.

Thanks,

Josiah
Palmetto State Armory
3760 Fernandina Rd
Columbia, SC 29210
Web Sales: 1-803-724-6950
11/3/2025 10:21:51 PM EDT
[#4]
Quote History
Originally Posted By PalmettoStateArmory:


The JAKL would not work with your Spike's lower.

Thanks,

Josiah
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Quote History
Originally Posted By PalmettoStateArmory:
Originally Posted By GreatDane:
I have a spare Spike's 9mm Glock lower with a Strike Industries 1913 adapter on it instead of a buffer tube. Is it compatible at all with a Jakl 9mm upper? What else would I need to do/change out to make it compatible?


The JAKL would not work with your Spike's lower.

Thanks,

Josiah


Thanks for verifying!
11/3/2025 10:23:43 PM EDT
[#5]
Quote History
Originally Posted By criley:
I have the same lower.  I put a Matador Arms roller delayed. upper on it.  Runs great - very flat shooting.  LRBHO works great.
View Quote


@criley
I'm... 33 days out from when I ordred my MAT-9K. Starting to have some buyers remorse due to the amount of time that I've been without both my upper and my money. If I don't have it by day 55, I'll be cancelling my order.
11/3/2025 11:53:47 PM EDT
[#6]
Waiting is no fun - I know.  I waited 2.5 months for mine.  It was worth it as far as I am concerned.  I had the previous, blowback Mat-9 sold by Brownells (BRN-9).   That thing would rattle my fillings.

The roller delayed is so much nicer.  I think the Mat 9 upper with the Spikes lower is a great combo.  I shoot mine suppressed basically 100%.  With a titanium can it's a small, light package that is very shootable and can stow away easily.

If you decide to wait I hope you like yours as much as i do mine.

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