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A3 Industries HK MP5 Folding Rifle Stock HDA3-MP5-A3-S-LF-BLK

A3 Industries
A3 Industries HDA3 Hybrid Polymer Stock
A3 Industries HK MP5 Folding Rifle Stock

A3 Industries HK MP5 Folding Rifle Stock HDA3-MP5-A3-S-LF-BLK

Add UPC Alert

A3 Industries HK MP5 Folding Rifle Stock HDA3-MP5-A3-S-LF-BLK

A3 Industries
A3 Industries HDA3 Hybrid Polymer Stock
A3 Industries HK MP5 Folding Rifle Stock

UPC
810151873374: MPN
HDA3-MP5-A3-S-LF-BLK: Brand
A3 Industries: Compatible with
Heckler & Koch MP5 Stocks: Main Model
A3 Industries HDA3 Hybrid Polymer Stock: Manufacturer
A3 Industries: Gun Type
Rifle: Gun Make
Heckler & Koch: Gun Model
Heckler & Koch MP5K: Length
7.9 in: Stockbrace Material
Polymer: Color
Black

Store	Price	Shipping rate	Report	Show more
Optics Planet	$332.50	FREE Shipping on most orders over $49, $9.99 Flat rate shipping on Ammo

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Recent comments

KGM R556 Heavy Use 5.56mm Suppressor Black - $399

Trump, is that you?

4 hours 47 min ago ByTrump4ever
Zev Technologies FDP 9mm 7" Barrel 10rd Pistol, Black, Used Excellent Condition - $3324.99

Why the hell is this thing $3324?? They are 1700 from zev?

5 hours 54 min ago ByRainbowDiddles
Bushnell AR Optics First Strike 2.0 Hi Rise 3 MOA Reflex Sight - $49.99

Yeah that's great if you wanted to ship something out to your friend, I would also choose the 5 to $7 option. But you do realize these people don't work for free and that there's always going to be some amount built in to the shipping to cover Warehouse labor costs. Somebody's got a box up your items and prepare them ship out to you and that person earns a salary so it's got to come from somewhere. I do agree that $17 is a bit ridiculous though

6 hours 54 min ago ByKingRansom
Advantage Arms 1.75-.308 Stainless Steel 7.62mm Suppressor - Black - $239.95

Baffle for bolt printed for semi.
Or have a shitty stamp collection in the safe.
Diligent for baffle
Exigent or ridgeback for print.

That's as good and cheap as it gets. And it's damn good and cheap.
Good times!

9 hours 10 min ago ByUndivided
Zev Technologies FDP 9mm 7" Barrel 10rd Pistol, Black, Used Excellent Condition - $3324.99

For that price you can get 3 police trade in gen 4 glocks in very good condition. A 17hmr, 450 bushmaster, 308 winchester, 8mm mauser bolt action from different brands, two different ar-15s and a ruger mark iv plus a tx-22 with a frt and 5 mags. I would know because after spending roughly 3000$ on guns in the past decade, thats what I got. Probably some ammo on top as well if you dont include tax. 1000 rounds of 9mm.

9 hours 18 min ago Bybl8ze1
Backorder - Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Chrome - $109.95

Thank you for that link, which I believe is evidence that JJE Holdings owns Toolcraft. That is news to me, and as a 2yro video I should have known. I avoid Youtube so that's not too surprising. Very strange they're not listed. Like you said, that fact doesn't mean PSA makes Toolcraft, nor does it mean PSA makes all the other brands under JJE, or that Kronos Knives makes PSA, etc. I respected Toolcraft's history as a highly regarded OEM provider, far in advance of PSA or JJE, so this is slightly disappointing. I hope the quality can be maintained. As gun owners using a gunsite you have been helpful w/o the attitude. Thank you

11 hours 11 min ago ByBDX
Backorder - Microbest C158 HPT/MPI 5.56 Bolt Carrier Group - Chrome - $109.95

6/22/2026 - I'm now convinced that RainbowDiddles is (mostly) correct. The only reason I say "mostly" is because I disagree with the phrase; "PSA makes Toolcraft". And I don't consider that to be anywhere near a big deal .... it's just a minor thing to me.
This video I found removed all doubt from my mind that Toolcraft Inc. is under the JJE Capital Holdings umbrella. I don't know why Toolcraft Inc. isn't shown on JJE's portfolio page ... seems to me it should and would be. Like you, I didn't think Toolcraft was associated with JJE prior to watching this 2 year old video: https://www.youtube.com/watch?v=XQo8UYqMfGg...

11 hours 43 min ago ByPanheadDude
Advantage Arms 1.75-.308 Stainless Steel 7.62mm Suppressor - Black - $239.95

Thank you for the info....enlightening!

11 hours 46 min ago ByAttackDonut
Zev Technologies FDP 9mm 7" Barrel 10rd Pistol, Black, Used Excellent Condition - $3324.99

Yeah let's add a ridiculous looking chassis that does absolutely nothing except folds, with bad ergos to a 7" barreled pistol then claim it to be portable, highly discreet and have rapid deployment when any pistol is all of that and doesn't cost $3300 used! This is a gimmick..and an expensive one at that.

11 hours 58 min ago ByLivinitup1976
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Reviews are quite mixed on this rifle. First and foremost is the fact they only take proprietary mags which are expensive and hard to find. Why they chose not to use standard AR10 or even AICS mags was a major miss. The next is accuracy, at only a 3 MOA average, I'm not sure I'd want it while staring down the scope at a buck/elk/bear of a lifetime. Users also report a problem with SOI once the barrel warms up. My guess it's poor bedding and or a cheap barrel? Of course I know all rifles will shift point of impact if the barrel gets hot but 2 or 3 rounds should not be affecting it enough that people are complaining about it. I do understand we are talking about a sub $500 semi auto hunting rifle and most budget guns have downsides. I just think as much as I don't need another rifle, it just isn't up to snuff. I have a whole safe full of budget hunting rifles and this one just isn't good enough yet to join the crowd. Now this is my opinion and thoughts and you may not agree. That's just fine, if you like the gun, then by all means buy it! Let us know what you think when you shoot it.

12 hours 7 min ago ByLivinitup1976