Heavier Buffer Question AR9

[Moondog1]

Yep absolutely. It will extend the life of your Bolt catch/latch for sure. I’ve seen bolt latch break off of more than one AR-9 if you have LRBHO take a look and see if it’s getting chunks knocked out of it from your bolt slamming into it hard. Mine was peening pretty badly shooting suppressed, over gassed, and I did the quarter trick and it’s not degraded any more. I would change buffer spring and buffer but I’m about to approve and want that stock I was showing you in the other thread which comes with a proprietary buffer and spring so I’ll just wait

So I checked the LRBHO and it wasn't beat up too bad, but you could tell where the bolt was impacting it. I also put $1.50 in the rear of the tube and it seemed to really close that gap with the different spring and buffer I just put in. I put in the buffer spring and buffer out of a PA10 lower. The spring was about an inch or two longer than the one that came out. The buffer was marked H from the PA10, the one coming out of the FX-9 wasn't marked. But the H is definitely heavier.

So to sum that up... added quarters, added ar10 buffer spring and buffer to my pistol FX-9. I just shot 75 rounds. I loaded 3 to 5 at a time making sure the last round would lock open and it did. I also took the can off and shot it unsuppressed and it still cycled and locked up fine. I think this thing needs a heavier bolt or something. I might look for some extra power springs or something if anyone has a link?

This thing rocks.

 

[Spikey]

JP has an excellent bolt. I run 4 of them with and without JP CSS Also the quarters are the trick with spings You've gotten good advice on here ! If you don't want to use quarters Frontier Armory makes a spacer that's nice .

 

[JDS556762]

So I checked the LRBHO and it wasn't beat up too bad, but you could tell where the bolt was impacting it. I also put $1.50 in the rear of the tube and it seemed to really close that gap with the different spring and buffer I just put in. I put in the buffer spring and buffer out of a PA10 lower. The spring was about an inch or two longer than the one that came out. The buffer was marked H from the PA10, the one coming out of the FX-9 wasn't marked. But the H is definitely heavier.

So to sum that up... added quarters, added ar10 buffer spring and buffer to my pistol FX-9. I just shot 75 rounds. I loaded 3 to 5 at a time making sure the last round would lock open and it did. I also took the can off and shot it unsuppressed and it still cycled and locked up fine. I think this thing needs a heavier bolt or something. I might look for some extra power springs or something if anyone has a link?

This thing rocks.

I’ll see if I can find it but I believe it’s made by KAK industries and it’s an adjustable 9mm bolt that includes a lot of combinations of weights to make any weight you need. I remember wanting one haha

 

[Spikey]

Well you guys made me go waste money ! Just ran 200 rounds thru my 4.5" integral suppressed 9mm with Dobbs can , Maxim stock with captured silent spring , side charging upper on a Quarter Circle 10 lower with my 17 year old daughter. We had fun !

 

[JDS556762]

Well you guys made me go waste money ! Just ran 200 rounds thru my 4.5" integral suppressed 9mm with Dobbs can , Maxim stock with captured silent spring , side charging upper on a Quarter Circle 10 lower with my 17 year old daughter. We had fun !

Pics of the integral! How’s the maxim look/run on it? Quarter circle 10 is good stuff man

 

[Spikey]

I'm old and really not good with the tech. I have no idea how to post a picture. Yeah I know sad ! I'll take a picture tomorrow and see if I can't figuire it out ! Yeah I've had the QC10 for almost 3 years and really like it. I got one of the first 50 Maxims sent out. I have 4 on various SBR builds 5.56 , .300 BO and two 9mm , one is a "arm brace " .

 

[JDS556762]

I'm old and really not good with the tech. I have no idea how to post a picture. Yeah I know sad ! I'll take a picture tomorrow and see if I can't figuire it out !

Look Like this-ish?

 

[Spikey]

Yeah kinda. Nice set up ! I favor Colt mags. I'm running side chargers re MAS outa NC . Using ALG rails Close looking to your black one

 

[JDS556762]

Yeah kinda. Nice set up ! I favor Colt mags. I'm running side chargers re MAS outa NC . Using ALG rails Close looking to your black one

Nah those aren’t mine I was just searching the Internet looking for one that met your build to get a feel for looks
Mine is still a pistol, I’m at 10 months on my Form 1 and want to go with a PDW stock myself. I too use the Colt fed lower (like it much more than the Glocks) but can’t decide what stock for sure yet! It will be approved anyday now.

This is mine

 

[Spikey]

Maxim is offering there stocks now with their own brand of buffer and spring. Got my last Maxim at Lanbo's Armory a lot less than most were selling them for ! This is the best pricing I found three months ago . My last 9mm build was unintentional. I stumbled across a Spikes 9mm lower complete minus trigger for $ 112 ! That's the truth ! Tried to get two but they only had one !