AR pistol with fixed Mag? (In mass )

[epinero]

Nice build!

What weight buffer?

Thanks! Came with the KAK "style" brace (bought from gunbroker) listed as a standard carbine buffer, not exactly sure of the weight guessing 3oz but recoil feels great, good shell ejection around the 4-5 o'clock position.

 

[pupchow]

... Is this “MA lock” something new? I’ve never heard of it.

Others leave them fixed and deal with the top loaders. Continue at your own risk in either case.

MA Lock | Mean Arms

 

[amm5061]

MA Lock | Mean Arms

I wouldn't rely entirely on this for fixing your mag. A blind pin or set screw as at least a backup is a good idea in this state, given what they did to the guy who got railroaded with the JC Arms lower. If they have to destroy the mag to get it out, then you have a halfway decent defense when they try to buy you a train ticket. Provided you use a competent attorney, that is.

 

[Dennis in MA]

Healy edict or not - if it's a pistol, you're going to need a repeal (Comm or USSC) of the mAss AWB in order to fill more than 10rds in that bad-boy.

 

[jayhitek]

Healy edict or not - if it's a pistol, you're going to need a repeal (Comm or USSC) of the mAss AWB in order to fill more than 10rds in that bad-boy.

what if you permanently affix a preban mag in it..?

 

[Shawnyc]

what if you permanently affix a preban mag in it..?

Then you are manufacturing a high capacity firearm.

 

[jayhitek]

Then you are manufacturing a high capacity firearm.

Come on! Why do they have to ruin all the fun!!

 

[Dennis in MA]

Come on! Why do they have to ruin all the fun!!

Been there, done that. LOL. AWB is a vile b-word. An AR pistol has a forward-of-grip magwell and weighs more than whateveritis ounces.

 

[Wildweasel]

50 ozs for non fixed mag

 

[DJBrad]

50 ozs for non fixed mag

Without the mag I would love to see this come to fruition in Mg and not Al under 50 ozs.

 

[Wildweasel]

it is possible with a skeletonized alum setup, Olympic arms did one during the fed AWB. or do one with a fixed mag for cheap which is what the thread is about.

 

[epinero]

Slapped on a muzzle brake on the 7.5" barrel...best way to burn your face off yes it's now removed

 

[DJBrad]

Slapped on a muzzle brake on the 7.5" barrel...best way to burn your face off yes it's now removed

A2 style brakes and those that push the blast at a perpendicular angle do no good for a 7.5” barrel imho. I use a Troy Claymore and that thing is awesome. It sends the blast straight out at slight angles from the center. “Towards the Enemy” as Troy puts it.

 

[Qjake17]

Slapped on a muzzle brake on the 7.5" barrel...best way to burn your face off yes it's now removed

Yeah not so good if you like your facial hair. Put a linear comp on mine, alot less violent for the shooter and the guy in the next lane.

 

[epinero]

A2 style brakes and those that push the blast at a perpendicular angle do no good for a 7.5” barrel imho. I use a Troy Claymore and that thing is awesome. It sends the blast straight out at slight angles from the center. “Towards the Enemy” as Troy puts it.

I had an A2 on it first, wasn't bad at all. I knew slapping that muzzle brake was a bad idea...but curiosity and boredom made me try it. I have another brake on the way that will direct everything front word. Even shooting from the cheek the recoil isn't bad at all and I've gotten pretty use to it, but goodness that brake smacked me in the face.

 

[amm5061]

I have a KAK flash can on my 7.5". If I hadn't been going for cheap on that build, I probably would have gone with a Noveske Flaming Pig.

 

[Viper22]

Is the KAK aluminum or steel?

 

[amm5061]

Is the KAK aluminum or steel?

It's a solid chunk of aluminum.

KAK INDUSTRY 1/2-28

 

[epinero]

So my barrel originally came with an A2 style muzzle device. Would that be ok on a fixed mag pistol/rifle?

 

[Wildweasel]

anything is ok (minus FA) with fixed mag awb doesn't apply

 

[amm5061]

So my barrel originally came with an A2 style muzzle device. Would that be ok on a fixed mag pistol/rifle?

Yup. Fixed mag makes it all good. I've got an A2 FH on the new upper I built for mine. Had it rolling around in the spare parts bin so I put it to use.

New 10.5" attached with the old 7.5" for comparison.




(yes, OAL without the muzzle device is > 26")

 

[epinero]

Ok cool, what a nightmare to have anything another other than an A2 on a 7.5". The rifle on top is a .22, all good there.

 

[amm5061]

Ok cool, what a nightmare to have anything another other than an A2 on a 7.5". The rifle on top is a .22, all good there.
View attachment 278024 View attachment 278025

Very nice. I found that a flash can or linear compensator are actually the best choices on a barrel that short. They throw all flash and noise down range, away from the you and anyone around you on the line. Also makes for some fun low light shots--think dragon's breath.

The Pig is generally the best option, since it actually has a baffle in it. Apparently one baffle is the limit before you venture into suppressor NFA territory. It does add about 3" to the length, though. That cheapo flash can on mine makes the 7.5" upper just about an inch shorter than the 10.5" with A2 flash hider.

And shockingly the 7.5" is stupid accurate at 50 yards. Didn't try to stretch it to 100 yards, but maybe I'll do some plinking at the 100 yard gong sometime soon.

 

[Shawnyc]

My profile pic is a 10.5 inch barrel SBR with the KAK flashcan.

 

[epinero]

Yup. Fixed mag makes it all good. I've got an A2 FH on the new upper I built for mine. Had it rolling around in the spare parts bin so I put it to use.

New 10.5" attached with the old 7.5" for comparison.

View attachment 277885
View attachment 277886

(yes, OAL without the muzzle device is > 26")

Is that vertical grip ok on the pistol? I thought only angled grips were ok, unless you SBR it

 

[amm5061]

Is that vertical grip ok on the pistol? I thought only angled grips were ok, unless you SBR it

See my comment at the bottom of that post in parenthesis.

If the OAL > 26" with the brace fully collapsed (if applicable) and no muzzle device, adding a vertical forward grip does not make it an AOW.

 

[epinero]

See my comment at the bottom of that post in parenthesis.

If the OAL > 26" with the brace fully collapsed (if applicable) and no muzzle device, adding a vertical forward grip does not make it an AOW.

Ahh ok thanks, just skimmed through this reading: Can you add a vertical fore-grip to an AR pistol?

I'm learning everyday

 

[Viper22]

Looks like everyone with AR pistols in this thread went 5.56....Anyone build one in 300 Blackout?

 

[epinero]

Looks like everyone with AR pistols in this thread went 5.56....Anyone build one in 300 Blackout?

I was wondering if the MA Loaders for the .223/5.56 work with 300 Blackout. I'd be interested in a build if that's the case.

 

[Viper22]

I was wonders if the MA Loaders for the .223/5.56 work with 300 Blackout. I'd be interested in a build if that's the case.

I don't see why it wouldn't. Same diameter case. Similar OAL.