r/canadaguns • u/iHaVocxT • Jun 14 '26
Gun and gear reviews Derya "Diaper" 9mm review
Today i picked up the Derya DYPA 9mm, which i ordered as soon as it was available. Being a pump action, I figure it'll last longer in our climate than something semi auto - It doesn't really compare directly to something like the Henry Homesteader, which was the 9mm I originally had my eye on.
Here are my impressions after putting about 100 rounds down the pipe.
First Impressions & Build Quality
Right out of the box, it has a decent amount of weight to it and feels sturdy in the hands. I was worried it might feel a bit like a toy but it is surprisingly robust. In fact, the build quality feels right on par with a TM22 Pro—the stock and pistol grip are identical, and the disassembly process is fairly straightforward.
The Action & An Unexpected Issue
When dry-pumping, the action feels solid but a little clunky. It is **not** spring-assisted, which is a feature I really enjoy on my Taipan X. However, I was pleasantly surprised by how much better it cycles when you are actually live-firing. Whether the action is just loosening up or the recoil helps, running multiple rounds in quick succession feels more than fine.
**One immediate issue to note:*\* After about 100 rounds, the bolt holding the stock and grip to the main receiver became *very* loose. This required a full disassembly of the rear portion of the firearm to retighten and apply blue Loctite to the bolts. Was not super impressed.
Magazines & Reloading
The gun comes with two proprietary magazines made by Derya. Compared to my aftermarket PMAGs, these are actually higher build quality and much closer to OEM Glock mags, so I'm sticking with them for now.
To save my hands, I picked up a Ludex speed loader, which made a massive difference. No more sore thumbs or spending over a minute loading a single mag—now it takes about 15 seconds with zero pain.
**An important note on mag insertion:*\* As others have mentioned, if you slam the magazine in too forcefully, it can over-insert, which locks up the bolt. When that happens, you have to drop the mag and seat it more gently. Because I prefer spirited reloads, I found a solid workaround: leaving the pump forward when inserting a fresh mag completely alleviates this issue.
Trigger & Ergonomics
The pump action runs smooth during firing, and the trigger actually exceeded my expectations. It's heavy, but you always know where it'll fire. I really enjoyed my brief shooting session with it and look forward to firing it again.
The Verdict
If you dislike manual-action firearms, you’ll probably want to stay away - if your only goal is to mag-dump a semi-auto as fast as possible just buy a homesteader. However, if you enjoy manually cycling your action and know what your getting for what you're spending, this might be worth a pickup.
It's cope, I know...
Any questions, let me know and ill do my best to answer.
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u/NoGrapefruit1213 Jun 14 '26
Thanks for the review I’ve been waiting for one! Sounds like a pretty decent rifle. I was really hoping they were in stock from FOC for the 15% sale but oh well I can wait will definitely be picking one up
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u/iHaVocxT Jun 14 '26
Its a great rifle for the money - I got mine even cheaper because I was orginally sold the fixed buttstock version from SFRC and they changed the batch to this and honored the lower price
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u/CurlyWurly61 Jun 14 '26
Saw buddy beside me using this
It's a cool concept but its so funny watching it in person
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u/Vintage_Pieces_10 Jun 14 '26
Ayyyyyyy fellow islander! Awesome new gun man!
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u/iHaVocxT Jun 14 '26
Ayyeee!
Thanks bro, maybe I'll see you out there 🫡
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u/Vintage_Pieces_10 Jun 14 '26
I’m usually at the Handgun part of the Henry range with some mare’s legs and some antique pistols so if you see me there feel free to come try!
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u/Massive_Expression_2 Jun 14 '26
Wow. Great in depth review. You must have saved a ton of typing time by copying a bunch of my post from last nite and pretending that those were your own words. I know I don't have a copyright, but please write your own stuff.
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u/ProfessorOfPain Jun 15 '26
I was wondering what had happened--I thought you had updated your post. This reply isn't getting the traction you deserve.
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u/Massive_Expression_2 Jun 15 '26
I don't buy a lot of guns that are new to the market, so I was pretty excited to share a few observations about this new introduction. There is so little on the website, in terms of ownership experience. This dude (in some places) copied so much of my post that I thought there was a glitch in the matrix as I read it. I've never seen plagiarism on Canadaguns before. I guess this is the new level of lazy.
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u/boothgremlin Jun 15 '26
Yeah, the last three paragraphs are virtually the same. I wonder if an AI pulled your text and regurgitated it for OP.
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Jun 14 '26
[removed] — view removed comment
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u/mwmwmwmwmmdw Jun 15 '26
if it was 2019 id still be interested in owning one of these for the fun and novelty.
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u/Acc4Wtf Jun 14 '26
Does it slamfire?
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u/iHaVocxT Jun 14 '26
Didn't appear to, although if your not holding the pump when you shoot, itll push the bolt and pump back far enough to see brass
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u/therowdyirishman Jun 14 '26
Thanks for sharing your insights! I'm glad you're having fun with it. Does the pump need to be pushed slightly forward before cycling? Or can you maintain rearward pressure and it'll start sliding back once the hammer drops? Did you shoot any groups on paper from the bench? Any accuracy data to share? Are the iron sights adjustable? Have you tried mounting anything to the forend? I feel like an AFG would be pretty sweet. Cheers!
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u/NoGrapefruit1213 Jun 15 '26
If I’m not mistaken the pumps don’t lock closed on these similar to scsa taipan
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u/Remote_Mistake6291 Jun 14 '26
My bolt holding the stock came loose after about 400 rounds as well. Other than that it cycles fine and is accurate. I am happy with it. My only hope is someone releases a beefier pump for them. This one is a little on the skinny side.
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u/GinnAdvent Jun 14 '26
Probably the next best thing for people to use the existing Glock mags and 9mm.
It doesn't look too bad either!
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u/Lumindan Jun 14 '26
The homesteader takes Glock mags
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u/EmotionalCheezies Jun 14 '26
I was gonna make a joke the smile at the end has serious hide the pain Harold energy but it is a very well-formatted review. Well done!
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u/Ok_Competition6823 Jun 14 '26
You can shoot steel with 9mm at your range? 😔
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u/iHaVocxT Jun 15 '26
Yep, only at the handgun/PCC range though
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u/Ok_Competition6823 Jun 15 '26
Lucky! Here in Vancouver we can only shoot .22 on steel
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u/mwmwmwmwmmdw Jun 15 '26
on a side note why are signs at ranges always so sassy and/or aggressive?
the only 2 places ive ever seen signs in a bathroom reminding you not to piss on the floor has been at shooting ranges
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u/No_Heat_6072 Jun 15 '26
question. You can dry pump. As in a pump with no round in the battery.
Does the round get locked into the battery when a round is present? And then unlock after trigger pull?
I don't see how it holds in the gas/pressure without someone sort of lock-release.
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u/iHaVocxT Jun 15 '26
It doesn't. If your not holding the pump when you fire, itll knock back out of battery. The pump never locks no matter what.
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u/AlbertaFree16 Jun 17 '26
Why are we posting a rapid fire mag dump of a pump action carbine and acting like “ooooooooh shittttt” at the end of it lol
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u/iNeedAdivorce Jun 14 '26
This was a really useful review. It absolutely confirmed that I do not want that fucking thing.