Backpack "pistol" concept project

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taliv

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You'll want to start by watching the short video I did for my latest project. It's only 1:49 and there's no talking or annoying music.



Overall, I'm pretty happy with the way it turned out. My goal was to fit an AR in a much smaller backpack (not shown) that is very mundane. While the ability to stow it in a non-descript book bag was prioritized over the sort of reliability and longevity you'd get from a factory-built colt 6920 or BCM carbine, I expect this collection of parts to be fairly trouble free; especially considering I can't afford to shoot tens of thousands of rounds of 300 blackout and don't plan on doing mag dumps til the barrel melts.

For this project I combined 3 unusual components:
- Shockwave blade pistol stabilizer
- LAW Tactical folder adapter
- Dolos barrel take down system

These parts have been out for a while, but I haven't seen anyone put them together yet.

To make the 8" pistol barrel practical, it is chambered in 300 Blk, and I'm using a Thunderbeast 30-PSS suppressor.

I'm using subsonic Harvester ammo from Silencerco. (not sure who actually makes it) It's been flawless so far, though is occasionally supersonic (or at least sounds that way).

Otherwise, the parts are fairly mundane, mostly nickel boron stuff I bought from righttobear.com for what I consider bargain prices.

So this is what it looks like when complete, and taken down as shown in the video, the entire thing fits in a 50 cal ammo can (which I guess technically is a 556 ammo can).

takedownpistolcomplete.jpg

A brief review of the parts:

Shockwave brace:
Not much to say other than it's so much cleaner than the sig brace, and it's cheap and easy. The screw that holds it onto a pistol buffer tube detent is probably not going to stand up to significant torque though.

LAW tactical folder:
This is the second one of these I've installed. I think it's pretty dang handy, but has a major downside and a couple of minor ones. The major one is that you can't take the BCG out of the rifle quickly. Instead of popping the takedown pin, hinging the upper off the lower and pulling the charging handle... you have to open the folder, press the button, pull the BCG out enough where you can get a hand on it, pull the spacer out of it, then push the BCG back in and return the stock to closed. Then you can pop the takedown pin and proceed as normal.
It would have been much preferred if they could find a way to add the spacer to the buffer instead of the BCG.

Dolos system:
Honestly, it's pretty neat and reasonably well executed. It comes apart and goes back together remarkably quickly. But it was a total pain the butt to procure and assemble. The instructions were horrible. And it only works with YHM rails, which means there's no real anti-rotation feature and that jam nut sucks. (Using an actual YHM barrel nut, there are two holes that you screw bolts into that provide anti-rotation, but those holes don't exist in the Dolos nut, so there's nothing but the jam nut to keep you from twisting it loose. :(
I hope they figure out how to make this with a higher quality rail.

In the following pictures, the end of the yardstick was aligned with the left side of the part, despite the camera perspective making it look short of that. So assembled, the total length including suppressor is just under 30".

The YHM 9" rail I used, plus barrel nut, plus the barrel extension protruding (and the gas tube sticks out another half inch past the extension) is about 11". The receiver itself is about 10.5" collapsed. And the stock/receiver are about 4" wide when folded.

takedownpistol1.jpg

takedownpistol2.jpg

takedownpistol3.jpg
 
This is awesome. I literally ordered the Law and Dolos to do an almost exact project on a 223 to keep in my truck. Good to see it here as I was going with the sig tac brace, but like the more compactness of the blade now seeing it all together.
 
The sig brace is kind of fat and fluffy. I wonder if it would even fold flat.
 
I love the shockwave, I have one on my pistol, but I really like the way you got this system to all fit in an ammo can. It looks like it all came from some top tier builder as a high dollar bug out kit. Very well done. A lot smaller than mine.

Sent from my LGLS740 using Tapatalk
 

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thanks!

my goal is to fit it in a camera bag

something like this from B&H photo is the perfect size at 12 x 9.0 x 4.0" but is a little more than i wanted to spend and would invite theft

ona_ona5_024lbr_prince_street_antique_1470589529000_1141770.jpg


this "holster" would also fit nicely and more reasonably priced, but wouldn't match my suit or shoes. ;)
lowepro_lp36774_toploader_pro_75_aw_1410753222000_1077484.jpg
 
I like it. Another good way to hide that would be a soft sided lunchbox. Not too many pack a lunch anymore so nobody would think of stealing it...

Sent from my LGLS740 using Tapatalk
 
Cool!
I'll vouch for the quality of Lowepro "holsters" too, although that might invite theft as much as the sachel looking thing.
Out of curiosity... Why no trigger guard? Or did I just miss something?
 
(see trigger guard in "complete" pic with ammo can. the bottom 3 pics with yardstick were taken during the build. still missing stuff like the gas tube. parts only hand tight.)
 
Stick a baby bottle in a water bottle holder on a bag....any would be "wanna see it" would think its a diaper bag. All theft deterred...
 
Was going to go with that KR which you have I believe. Although, looking at it now, I may want to go for a sleeker look and use their 'custom' series or whatever they call it to get that look.

Hope they do come out with other than YHM options as you said...
 
That looks really neat. What do you think of the LAW hinge? I have only one SBR lower and it would make several configurations significantly shorter.

Does it really add 10.5oz of weight?

Mike
 
it's heavy as balls. but it's in the rear of the gun, so it would probably help most guns handle better

someone who's opinion i trust told me that when they tested them they experienced some instances of the plug in the BCG backing out a little. I've been using one in my SBR since Sep of last year... maybe a couple thousand rounds. nothing obscene... and haven't had any problems with it, but it's something to keep an eye on.

and it adds the weight of that plug to the reciprocating mass and probably a little extra friction, so that will change your gas characteristics. some people may want to move from an H buffer back to a normal buffer. but it works for me since i'm shooting suppressed and slowing the unlock time helps me.

it is very sturdy. i have no qualms about it bending or getting jiggly etc.

overall, it's worth it on the two guns it's on, but i wouldn't put it on any of my 16" or 18" guns.
 
I've always wanted to pair one of those with an SCR straight-stock lower -- très skinny :cool:

Too bad they didn't incorporate a bufferless arrangement into the upper when they designed the AR57, otherwise it could be a collapsing stock (and you'd be able to hide the thing in a loaf of French bread while not in use :D)

TCB
 
something like this from B&H photo is the perfect size at 12 x 9.0 x 4.0" but is a little more than i wanted to spend and would invite theft

You need a diaper bag, no one tries to steal them. Even if you set it down and walk away someone will pick it up and chase after you to return it.
 
Great. Another thing I want if I ever get outta Jersey and move to America ;-)
 
Great. Another thing I want if I ever get outta Jersey and move to America ;-)
Lol. Part of the reason I fear leaving CA. I can easily come up with at least a dozen or more things that would be fun to have because I can.
 
Could you drop a roundabout number for build price? I'm looking at it and absolutely loving it. I also like the leather bag, but agree that it looks like something folks may want to steal. What optic is on top?
 
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