MA legal AR pistol build may have just got a little easier

[Boris]

Boris, is that plastic?

it's plastic and it's fabulous, don't be hatin'

My friend has one and 500 556 rounds later it's still going strong

 

[dcmdon]

I'm not knocking it. I was just curious.

What brand is it?

 

[Boris]

I'm not knocking it. I was just curious.

What brand is it?

What do you mean? It's DIY, I made a mold to make these. http://www.ar15.com/forums/t_3_4/67..._of_ARs_cheaper__faster__gentler_.html&page=1

 

[dcmdon]

Haaa. holy crap. I knew about your steel exploits. I didn't know you were making a plastic version (like child toy) of an aluminum gun (like lawn chair)

 

[Cmaro21]

What do you mean? It's DIY, I made a mold to make these. http://www.ar15.com/forums/t_3_4/67..._of_ARs_cheaper__faster__gentler_.html&page=1

Boris, you never cease to amaze me. Your son was very generous to let you borrow his legos.

Question, did you do any of these with the steel reinforced pin holes like in your arfcom pics? If so, how did you embed that in the middle of the mold so that the holes would line up correctly?

 

[dcmdon]

Boris,
Would you ever consider having a mold making party? Where we could make a mold and then maybe drink some Wodka,
Then when the mold is dry, we could cast our first fruity lower?

re longevity - I'm wondering how much stronger it would be if fiberglass chop was added to the resin before casting.

Don

 

[Boris]

Question, did you do any of these with the steel reinforced pin holes like in your arfcom pics? If so, how did you embed that in the middle of the mold so that the holes would line up correctly?

In the mold everything is reversed, so a void (like a hole) is actually rubber, it's a rubber peg onto which you hang the reinforcement.

for the FCG I use boxed unit. After a few hundred rounds the pin holes will egg.

 

[Cmaro21]

Sorry, I asked that before I finished the 14 pages over at arfcom. In theory, the best place for the reinforcement is stuck in the middle of the plastic, no exposure. I've got some idea's and will definitely be trying this out. If you have an extra reinforcement laying around please let me know. I want to clay the exterior of the lower to ad thickness around the of the takedown whole, like a 308. This will add material to the weak point and also allow me to float plastic on both sides of the reinforcement so no metal is visible. I'm ordering my supplies today.

 

[warwickben]

In the mold everything is reversed, so a void (like a hole) is actually rubber, it's a rubber peg onto which you hang the reinforcement.

for the FCG I use boxed unit. After a few hundred rounds the pin holes will egg.

I like your fancy buffer tube reinforcement . How do you form that?

 

[jho]

Drop the hand guard . Can't have one on a ar pistol in mass. It counts as a barrel shroud.

Lighten the bcg. Can go ti, but you can Swiss cheese a semi bcg.
Slick slide upper.

Integrated upper make a difference?

 

[Boris]

Boris,
Would you ever consider having a mold making party? Where we could make a mold and then maybe drink some Wodka,
Then when the mold is dry, we could cast our first fruity lower?

re longevity - I'm wondering how much stronger it would be if fiberglass chop was added to the resin before casting.

Don

I'm down with Freedom!

We need a place (like a kitchen table or living room) and need to figure out logistics. Rubber takes 6h to cure, but after an hour or so, it's hard enough to take home. The cutting of the mold is probably more complicated part. If we can try do this in metrowest or close to it, few people, may be weeknight or two weeknights for mold pour and cut. I can bring some of my shit to show.

 

[Boris]

Sorry, I asked that before I finished the 14 pages over at arfcom. In theory, the best place for the reinforcement is stuck in the middle of the plastic, no exposure. I've got some idea's and will definitely be trying this out. If you have an extra reinforcement laying around please let me know. I want to clay the exterior of the lower to ad thickness around the of the takedown whole, like a 308. This will add material to the weak point and also allow me to float plastic on both sides of the reinforcement so no metal is visible. I'm ordering my supplies today.

There is Raynolds Advanced Materials on Electric Ave in Brighton. They have entire line of Smoothon at the same prices as Internet, plus you can talk to people and handle samples of various plastics.

Also, most of the reinforcement isn't visible, there are just some parts coming to the surface. Here is an opaque example.

I like your fancy buffer tube reinforcement . How do you form that?

Just pliers over a pipe. I have same design but three parts now, just to save on metal.

 

[spcantwell]

I'm in for a mold party, I have been looking for a plastic lower for a non-cycling AR based toy...

Sent from my KFSOWI using Tapatalk

 

[warwickben]

If you do a party etc I'll need to come .
I need a lower I can cut the buffer tower off and use clay to shape a bullpup idea I have to make a mold . Just been too cheap and lazy to buy a 80%.

 

[Nation On Fire]

(iii) a shroud that is attached to, or partially or completely encircles, the barrel and that permits the shooter to hold the firearm with the nontrigger hand without being burned;

That's one hell of a reason to ban something. Their reasoning doesn't even pretend to be legitimate.

 

[dcmdon]

Integrated upper make a difference?

Yeah, except you just added 8 oz compared to a carbon fiber tube with an Al barrel nut.

 

[CTpatriot]

That's one hell of a reason to ban something. Their reasoning doesn't even pretend to be legitimate.

the glove lobby was behind this one.

 

[jho]

Yeah, except you just added 8 oz compared to a carbon fiber tube with an Al barrel nut.

Pin and weld?

Sent from my SM-T237P using Tapatalk

 

[warwickben]

Pin and weld?

Sent from my SM-T237P using Tapatalk

Still counts as a barrel shroud.

 

[Broc]

Too bad you'd have to remove the hand guard to get around the the awb too.


pistols can violate the ma awb . It's for stuff like ar ak pistols , tech9 , mac's , Uzi etc.

It's easier to just sbr a ar in mass then build one to match the awb .

Seems like building one wouldn't be too hard. These are pretty light and are full blown rifles, not pistols:http://www.calguns.net/calgunforum/showthread.php?t=1005966

 

[warwickben]

Seems like building one wouldn't be too hard. These are pretty light and are full blown rifles, not pistols:http://www.calguns.net/calgunforum/showthread.php?t=1005966

I need to look into that more.

 

[Broc]

I need to look into that more.

Seems a lot easier than dealing with SBR BS. Specially if you might move in the future.

 

[warwickben]

Seems a lot easier than dealing with SBR BS. Specially if you might move in the future.

Moving not that bad. My view a ar pistol is pointless cause of the buffer tube.
I'd rather have a sbr then a pistol ar.
That said I wouldn't mind a pistol Ak.

 

[bigblue]

Moving not that bad. My view a ar pistol is pointless cause of the buffer tube.
I'd rather have a sbr then a pistol ar.
That said I wouldn't mind a pistol Ak.

But that barrel is so thin that I would worry about heat dissipation and barrel life.

 

[warwickben]

But that barrel is so thin that I would worry about heat dissipation and barrel life.

If you did it a pistol length barrel you could use a thicker profile.

 

[LoginName]

If you do a party etc I'll need to come .
I need a lower I can cut the buffer tower off and use clay to shape a bullpup idea I have to make a mold . Just been too cheap and lazy to buy a 80%.

Google around.
You might be able to find torch cut/demilled M16 receivers...

 

[warwickben]

Google around.
You might be able to find torch cut/demilled M16 receivers...

I need all the other parts like mag well etc .

 

[7.62x39]

What do you mean? It's DIY, I made a mold to make these.

Can you confirm this rumor
Is it really true that you came up with the formula for this plastic while experimenting with latex for new shop uniforms for your Comrades?