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I have around 2K rounds through my AR9 FM9 lower with the CMC 3.5lb AR9 flat faced trigger and it's been 100% and that includes some ridiculously light 95 PF loads as well as 135 PF loads.

I have, well, let's say I have a few of them installed and I love 'em. I'm a lefty and it just feels good to be able to clear the gun still on my shoulder while holding the forend-very solid and easy to keep the dot on the target. Another benny is not having to worry about bustin' myself in the nose weighs less than five ounces which equates to 10 of my 147 grn rounds. My rifle as configured weighs exactly 6 pounds 11 ounces which feels light to me but I'm guessing the real gunners would consider that too heavy.

I picked up a Faxon 16 inch barrel with integral muzzle brake, FM9 lower, CMC 9mm trigger, Blitzkrieg HD 9mm buffer and a no name upper and handguard and it's been 100% shooting it in USPSA competition. Cost me WAY less than a "store bought" gun.......

Quick question-how do you think these numbers would work through a 16 inch barreled blowback PCC? Thanks for your hard work!

My recent experience (last two years} of building AR9's shows that until very recently, 9mm AR barrels were more often than not 1/2 X 36 but recently I find there are more barrels that are available being threaded 1/2 X 28 and I think that's a mistake...... I think that 1/2 X 36 was a smart idea to keep the clueless idiots from putting their AR15 .223 muzzle brakes on a barrel that will blow up the gun (and possibly hurt themselves and others) on the first shot............

On another note, I have two AR15 AERO lowers that I've converted to 9mm Glock by installing Sylvan conversion blocks and they have been 100% reliable. The Sylvan block is a solid, robust component that requires ZERO tweaking to get them to work-in fact, the simplicity of the piece is such that there isn't anything to "tweak". You need to look at their site and see the piece to understand it's construction and installation. I've shot the heck out of them and they just work. I'm a Lefty and love the ambidextrous design of the mag release-it's in front of the magwell and works perfectly.

Couple of quick things that I just went through myself...... First off, remember that if you purchase a lower that has a "rifle" buttstock on it, you can NOT use it to build a "pistol" as the form 4473 will have it listed as a "rifle" and it can not be converted to a "pistol" AR unless you want to go through the hassle of registering it as a SBR. If you use either a stripped or completed lower that did not come with a stock installed, they will be listed as "other" on the form 4473 and you can do what you want with them. If the lower came as a "pistol" lower, obviously no issue as it will be listed as "pistol"... Length of pull can not exceed 13.5 inches and it is measured from the face of the trigger to the back of whatever "stock" you install and the "stock" must be at it's most extended position when you measure it. Overall length can not exceed 26 inches and it is measured from the muzzle (minus any removable muzzle devices) to the rear of the brace at it's collapsed to it's shortest position. To qualify as a pistol, you must meet all of these requirements and you can NOT install a vertical or angled grip. Hope this helps!

If there is ANY spring that needs to be replaced IMMEDIATELY, it's the striker spring as it is ridiculously overpowered. The pistol was designed to pass NATO requirements for reliability and accuracy up to 60,000 rounds and the ability to "ignite" NATO spec sub machine gun ammo (obviously part of the NATO specs) and in this discussion means that the striker spring is WAAAAAY stronger than needed. If you change the spring, aim it at an interior wall when you remove it from the striker because if it gets away from you, it will be easy to find as it will probably be found embedded in the dry wall!!!!

That is one awesome looking pistol!!!

I'm confused-been loading 9mm, 380, 45 ACP, 38 Special and 357 mag using Dillon dies exclusively in 550's for over 40 years and have NEVER had an issue with them over God knows how many thousands upon thousands of rounds.

Yeah, that's a little confusing....... we all know that a gas driven should chuck them about 4 o'clock.... with your response I don't know if you're giving examples for AR15's or AR9's but thanks anyway as I know were AR 15's should eject-the question is AR9's.....

Did you put the Blitzkrieg weight at the front of the recoil assembly or did you put it at the bottom? I have he HD Blitzkrieg buffer installed in my AR's.

What recoil spring and buffer are you using????

Don't know who the question is for but myAR 9's all have CMC pcc triggers.

I have CMC triggers in all of my AR9's and they all will shoot magnum small rifle primers.... The Canik TP9SFI have is significantly modded and it won't shoot the mag rifle primers reliably but shoots the rifle primers just fine.

Interesting-I was thinking that bolt speed would be the determining factor as to the "direction" that the empties would be thrown from the rifle. I do need to add that the rifles are 100% reliable-I was just assuming that the ejection pattern would illustrate the same "issues" with both rifles. In the AR15 it has to do with bolt speed so I assumed it would be the same for the 9mm..... I was thinking that some more "tuning" would smooth out the guns and improve my split times.........

I know that a properly "tuned" AR 10 and 15 throws empties between 3 and 4 o'clock and I was curious if a properly tuned AR-9 should do the same thing with the correct balance of recoil spring, buffer and ammo..... My current AR-9's throw empties at around 2 o'clock......

They still have some!

I have CMC 9mm 3.5lb triggers in four different lowers and uppers and I can swap them through all the combinations and no issues whatsoever. I do have the Blitzkrieg 9mm buffers in all of them...

Just to let you know, I installed a reduced power plunger spring that I picked up for 5 bucks at Cajun Gun Works and believe it or not, it had a VERY SIGNIFICANT impact on the trigger pull and thats even with the Freedom trigger installed.... I also did polish up the plunger itself as it had a very little bit of "drag" when pushed up and down in its mounting hole so I'm sure that helped alot too. I did do the polishing first and noticed a significant decrease in trigger pull after installing the spring.

reduced power Glock firing pin block/plunger safety spring..... I did this PLUS the Freedom trigger, the lighter striker spring, the W74 spring guide and the brass back spacer as well as the brass base plates on the mags. Made a DRAMATIC weight increase for the pistol....

I have TWO Sylvan Arms conversion blocks in two different manufacturers lowers and they are 100% reliable. They are very solid, won't come out and the mag release is in front of the mag well which makes it ambidextrous in my opinion as I'm a Lefty. Another plus is that they cost around $100.00. The factory Glock mags are a little tight and won't drop freely until you sand just a LITTLE bit of the plastic coating up in the magwell area. ETS mags drop CLEANLY without any work needed on them. The sanding on the Glock mags amounts to just a few strokes on both sides with some 400 grit sandpaper and then they'll drop free. I like the ETS mags better anyway because I can see how many rounds are in the mag and they are a LOT cheaper than the factory Glock mags. The ETS 40 round mag is awesome and I use it in USPSA a lot! I have a BUNCH of the ETS mags and they ALL have been 100%.

Thanks for the replies!

Thanks for the reply's. I guess my question would be why did they pick a particular oal for a bullet..... What was the thought process... As an example, why did they decide that they would use 1.13 oal for a Hornady 147 grn HP for an Alliant SP load...... What was their thought criteria and why do ANY of the other powder manufacturers pick a particular oal for a given load????? Thanks for the reply's.....

Thanks for the info-unfortunately, that doesn't explain why the manufacturer picked that particular OAL to use for their load data. THATS what I'm looking for...............