This AR15 pistol stuff is still new to me, so I'm still pretty ignorant on the subject.
What is the max length of pull (LOP) on an AR pistol vs the LOP on a rifle?

to the best of my knowledge the following is correctly reported from BATFE correspondence on LOP and OAL

https://www.usconcealedcarry.com/blog/keeping-your-ar-15-pistol-build-within-legal-limits/

Pistols don't have a length of pull unless you measure it from the palm of your hand.

C'mon man!!! You know the OP means if it was measured from the end of the brace AS IF it were a stock!

I don't remember BUT there is a distance where the brace length virtually could be considered the same length as a stock.

13.5

Thanks, gentlemen.

And from what I'm finding the LOP on a standard A2 is 13.8", right?  So a difference of 0.3"?  I can live with that.

ATF likes to violate their own rules and measure diagonally instead of inline with the bore in order to jack law abiding citizens up.

I therefore have been setting up all my braces so I am under 13.5" even if the subhumans measure diagonally from the most forward curved tip of the trigger to the furthest extending point of the brace trying to make the measurement as long as possible.

You may consider doing likewise.

YMMV

would not the submitting to the measuring constitute infringing of the amendment 2?


Keep your comments in the realm of the technical, please    -C

Anything with a law folder, I would recommend putting some jb weld in the last position hole. It is not easily removed, and will make sure you don't exceed the 13.5 inches.

YEP 13.5

What if you have a tube and no brace... still 13.5"?

Thinking A2 tube on a pistol.

Standard AR-15 lower is under 13.5" with an A1 tube.  Just don't add the A2 spacer.

For large 308 size lower usually will put you over 13.5" so in that case A5 pistol tube is best option if you need a longer/heavier buffer system.

The tube I bought listed it as an A2, but came with no spacer. It must really be an A1 tube.

Just measured and its right at 13.5" if measure diagonally from middle of trigger bow to middle of tube with a Cain Arms sling mount attached. http://www.cainarms.com/product/ultralight-ar-15-a2-pistol-sling-mount/

Measured parallel and LOP is about 13.25".
 

I have never actually seen a true A2 tube or buffer system. To my knowledge everyone just uses the A1 tube plus the spacer to bring to A2 length.

Different triggers can also slightly change the LOP measurement.  I actually have one build with a shortenened flat trigger because if you measured diagonally from the very tip of the original curved trigger to the top rear of the 3D printed blade style arm brace brace to fit an A1 tube you could get like a 13.53" measurement if you really were trying to. (1/32" over).  Different flat trigger plus "Grinder Go Burrrrrrr" a little and 13.44" was the longest you could possibly make it measure diagonally and the trigger still works real nice.

People might call me a "Sissy" for worrying about them trying to measure diagonally especially since the ATF got their hand slapped in that case where they tried to prosecute that guy for having a brace that when measured correctly inline with the bore was under 13.5" but when measured diagonally was over.  But if I can make it harder for government to try to F&$# me over without sacrificing capabilities.  Yah, me do that.

I mean gov. be like F&$# over innocent people be why they freaking exist.

Seems your measurements of the A1 extension tube are the same as mine with this so called A2. https://www.opticsplanet.com/phase-5-weapon-systems-inc-the-a2-rifle-receiver-extension-tubes.html

My desire isn't to get a max LOP, but an attempt to reduce the felt recoil impulse using a rifle tube, w/Tubbs spring + hydraulic buffer + a spacer that allows the spring to extend over it. I'm hoping this will work and according to some input it should.

Similar application on my end.  If you know what you are doing you can get 6@tungsten weights inside the longer buffer and pin the 3 forward weights into solid position by putting a pinned spacer in the middle and have the 3 rear weights with rubber pads in loose with "room to rattle" for the deadblow hammer effect to prevent bolt bounce.

This with a rubber bumper in the back of the tube to soften the blow at end of travel and keep the bolt from going too far back (reduce last round hold open bolt carrier catch abuse & prevent empty case bounce back into FCG area jamb up malfunction) is the best setup I have been able to find for blowback guns chambered for pistol cartridges.  Provides enough good heavy mass to tame the blowback and preserves the true deadblow hammer anti-bolt bounce effect.

So, yah, I'm using the extra long tube and buffer for a slightly different reason.  But in both cases we are both trying to cramb more stuff in the back of the gun and we need more physical space to work with back there.

My apologies if I hijack the thread.

My pistol with a standard carbine buffer tube and a SBA4 puts the LOP to be right at 13.5" (maybe tad more - I can't get accurate measurement because the brace's butt is not completed flat). Do you guys know if the set up is within the rule? I am thinking to put a LOP limiter just to be on the safe side. Thanks.

The maker of your brace "SB" usually tries to make their setups semi-idiot-proof as in if your using their stock brace on a stock carbine extension with a standard lower with standard fire control group everything works out so you don't excede 13.5" at the longest adjustment.

That said.  ATF and local-LEOs have a very bad habit of deliberately measuring at an angle to make "by the book" legal setups look illegal so they can F$&+ innocent citizens up.  Even though they have been slapped on the hand by courts for doing so they keep doing it (I think they need more then a slap on the hand to get the message, I'm for public hanging at high noon immediately after trial but am willing to negotiate that down to something a little less if it's sufficient to put the fear of the people back into crooked government thugs).

I pretty much setup all my stuff to be 13.5" or less no matter what angle the measure it at (full radius arc from the most forward portion of the trigger).

Your stuff is your stuff.  But if it were mine, yah, I'd put in a limiter to lock out that last position if there was any question at all.

I actually know what it is like to deal with corrupt government that takes up the position of "You might beat the rap but you can't beat the ride." & "Repeat unwarranted frivolous prosecution as a means of persecution." And all the court headaches that go with all that.  Thankfully not on gun stuff or with the feds. local scum on another issue.  But I've got a local rap sheet that is longer then your arm, all arrests no convictions and as additional persecution I can't get it expunged even though they were all persecution prosecutions and I have won literally hundreds of thousands of dollars of damages in suits against the locals including punitive damages.  But it's just tax dollars not their own money, they don't care, they just keep pulling the same sh*t.

The entire nation of 2A advocates are about to get the same treatment on a federal level for the next 4-years at least so COVER YOUR REAR or they will bend you over and give you a ride and expect you to thank them for it afterwards.

^^ Thanks. I'll put in a limiter just to be sure.