9MM AR-15 style Carbine Build Documented
- Thread starter Kramer
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- 9mm carbine build parts
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Lol. I'll play. DDLES lower - $250 SSA-E trigger $250 9Q heavy buffer + Wolff spring -$125 TROS 5" 3-lug barrel - $125 RRA 9mm upper - $175 4" rail - $125 CMMG 9mm bolt ~$200 MFT Minimalist stock Buffer tube.I think he was asking for the ACTUAL cost, not the one you told your wife.
I think he was asking for the ACTUAL cost, not the one you told your wife.
Hahaha!!! I don't know what you're talking about.
Sent from my iPhone using Tapatalk
Guns look nice! But not sure about those toes...crop those images!
Toes are traditional.
Here I always thought I was a conservative, but now I am thinking I must be a progressive since I am not respecting tradition.
Here I always thought I was a conservative, but now I am thinking I must be a progressive since I am not respecting tradition.
The toes are an ongoing MDS joke, the fact that none of your images in this thread included any toes is actually a little shameful.
Spikes ST-9X Buffer
I got the Spikes ST-9X buffer today in the mail from 9mmar.com.
They are very fast at shipping--gotta like that.
It is a little lighter than the advertised 8.5oz but still
a lot heavier than my stock 9mm buffer:
It is almost an inch longer than the old buffer:
I put it into the carbine. The length is virtually perfect
for my buffer tube (I hope). With NO spacers it clears the
back of the bolt catch by about 3/32". If I put one quarter
in as a spacer it is right on the bolt catch: maybe 0.1mm
of clearance. Still waiting on shipment for new spring
and new bolt catches.
Clandestine, how much clearance is optimal do you think
between bolt and bolt catch when bolt is pulled back
to contact back of buffer tube (or spacer)? My gut
feeling is that the virtually 0" clearance with one
quarter is just to close and could result in catch
not working. I cannot go further than 3/32" as that
is the back of the buffer tube. Is 3/32" pretty good?
-Thanks, Kramer
I got the Spikes ST-9X buffer today in the mail from 9mmar.com.
They are very fast at shipping--gotta like that.
It is a little lighter than the advertised 8.5oz but still
a lot heavier than my stock 9mm buffer:
It is almost an inch longer than the old buffer:
I put it into the carbine. The length is virtually perfect
for my buffer tube (I hope). With NO spacers it clears the
back of the bolt catch by about 3/32". If I put one quarter
in as a spacer it is right on the bolt catch: maybe 0.1mm
of clearance. Still waiting on shipment for new spring
and new bolt catches.
Clandestine, how much clearance is optimal do you think
between bolt and bolt catch when bolt is pulled back
to contact back of buffer tube (or spacer)? My gut
feeling is that the virtually 0" clearance with one
quarter is just to close and could result in catch
not working. I cannot go further than 3/32" as that
is the back of the buffer tube. Is 3/32" pretty good?
-Thanks, Kramer
clandestine
AR-15 Savant
I got the Spikes ST-9X buffer today in the mail from 9mmar.com.
They are very fast at shipping--gotta like that.
It is a little lighter than the advertised 8.5oz but still
a lot heavier than my stock 9mm buffer:
It is almost an inch longer than the old buffer:
I put it into the carbine. The length is virtually perfect
for my buffer tube (I hope). With NO spacers it clears the
back of the bolt catch by about 3/32". If I put one quarter
in as a spacer it is right on the bolt catch: maybe 0.1mm
of clearance. Still waiting on shipment for new spring
and new bolt catches.
Clandestine, how much clearance is optimal do you think
between bolt and bolt catch when bolt is pulled back
to contact back of buffer tube (or spacer)? My gut
feeling is that the virtually 0" clearance with one
quarter is just to close and could result in catch
not working. I cannot go further than 3/32" as that
is the back of the buffer tube. Is 3/32" pretty good?
-Thanks, Kramer
Depending on how hot the ammo is the gap will open up when the buffer pad impacts the buffer tube under recoil. The pad compresses a little but not much.
I would leave it with the 3/32 gap and see how things go with the flat wire spring and the spikes buffer.
We will get your gun 100% my friend.
clandestine
AR-15 Savant
Some fellers are hard herded and have to learn the hard way.
Yeah. You live and learn.
clandestine
AR-15 Savant
You know I love you long time.
Its in your nature to prove out things, its what you do.
Bolt Catch Replaced, Test Firing Results Not So Good
I finally got a new bolt catch and associated hardware from brownells.
Boy, their shipping is slow. Reminds me of pre-Amazon days. Get so
spoiled by the prime shipping. But I digress.
I went to install the new bolt catch. My lower receiver has a set
screw instead of a pin holding the bolt catch in. I went to take
the pin out with my hex driver and NOOOOOO, the hex driver started
spinning and rounded out the hex head. Screw did not budge.
I may have put some blue loctite on it when I assembled it--not
sure, but if I did that was a big mistake. I tried all kinds of
things to get it out. Heated it up with torch and soldering iron.
Tried epoxing my driver into the head. Filed the pin part to
a half round and used a pliers to twist it. All to no avail.
Finally I went for the nuclear option--drilled it out. Which
was hard because a drill will hit the receiver surface normally.
Used lots of extensions on a drill to do it. It worked!!!
Got the pin out. At this point I had to use a roll pin to put
a new catch on. I drilled out the front part of the mount for this.
The new catch I got seemed beefier than the last one. It also has
an extended lower part so it is easier to depress manually to catch
the bolt. Metal also looks harder. I used a shim washer on the rear
side of the catch to try to take out play in its fit. Here is
the new catch installed:
You will note I damaged the black finish while drilling out the
old set screw. Anyone know of an easy thing to use to touch up
that black anodized like finish?
The bolt catch worked with the new ST-9X buffer that I had installed
earlier. There is about 1mm between the buffer and bolt hitting
back of buffer tube and going forward to bolt catch--very tight
spacing. Had me a little worried.
Got to take the gun to the range today for test firing of new
configuration. Loaded 10 rounds. Fired two and then, ARGHH, could
not pull trigger to fire third round. Pulled charging handle
and an unfired round ejected. Aim, fire, and it shot. Of next
six round 2 more misfire in the same way
Loaded 15 for next set and it only misfired once which made me
think that maybe it just needed some magical "breaking in".
But in the end, it still seems to be a problem. Put 150 rounds through it
in total. The last set I loaded a full 32 rounds and it misfired on 4 of
them. All the misfires it was just that the trigger would not pull.
What could cause this? At first I thought it was that the trigger was not
getting cocked. But when I got home I played with it and it seems the
trigger cocks once the bolt moves only an inch rearward. It seemed a
round was feeding fine because it always ejected one after the misfire.
The bolt looked to be visually closed all the way. Every time it
misfired, I would pull the bolt back with the handle all the way
and the next round fired fine. I did not open up the rifle to see
the state of the trigger after the misfire--not sure I could even
do that safely. Is it that the trigger is not cocked, or is it blocked
maybe? Any ideas? Before the new buffer, spring and bolt catch it
did not misfire once with 300 rounds fired. So something I did has
messed things up. Here is a photo of the relevant parts as of now
(note it was clean before I did my test firing; click on the image to get a hi-res version):
I finally got a new bolt catch and associated hardware from brownells.
Boy, their shipping is slow. Reminds me of pre-Amazon days. Get so
spoiled by the prime shipping. But I digress.
I went to install the new bolt catch. My lower receiver has a set
screw instead of a pin holding the bolt catch in. I went to take
the pin out with my hex driver and NOOOOOO, the hex driver started
spinning and rounded out the hex head. Screw did not budge.
I may have put some blue loctite on it when I assembled it--not
sure, but if I did that was a big mistake. I tried all kinds of
things to get it out. Heated it up with torch and soldering iron.
Tried epoxing my driver into the head. Filed the pin part to
a half round and used a pliers to twist it. All to no avail.
Finally I went for the nuclear option--drilled it out. Which
was hard because a drill will hit the receiver surface normally.
Used lots of extensions on a drill to do it. It worked!!!
Got the pin out. At this point I had to use a roll pin to put
a new catch on. I drilled out the front part of the mount for this.
The new catch I got seemed beefier than the last one. It also has
an extended lower part so it is easier to depress manually to catch
the bolt. Metal also looks harder. I used a shim washer on the rear
side of the catch to try to take out play in its fit. Here is
the new catch installed:
You will note I damaged the black finish while drilling out the
old set screw. Anyone know of an easy thing to use to touch up
that black anodized like finish?
The bolt catch worked with the new ST-9X buffer that I had installed
earlier. There is about 1mm between the buffer and bolt hitting
back of buffer tube and going forward to bolt catch--very tight
spacing. Had me a little worried.
Got to take the gun to the range today for test firing of new
configuration. Loaded 10 rounds. Fired two and then, ARGHH, could
not pull trigger to fire third round. Pulled charging handle
and an unfired round ejected. Aim, fire, and it shot. Of next
six round 2 more misfire in the same way
Loaded 15 for next set and it only misfired once which made me
think that maybe it just needed some magical "breaking in".
But in the end, it still seems to be a problem. Put 150 rounds through it
in total. The last set I loaded a full 32 rounds and it misfired on 4 of
them. All the misfires it was just that the trigger would not pull.
What could cause this? At first I thought it was that the trigger was not
getting cocked. But when I got home I played with it and it seems the
trigger cocks once the bolt moves only an inch rearward. It seemed a
round was feeding fine because it always ejected one after the misfire.
The bolt looked to be visually closed all the way. Every time it
misfired, I would pull the bolt back with the handle all the way
and the next round fired fine. I did not open up the rifle to see
the state of the trigger after the misfire--not sure I could even
do that safely. Is it that the trigger is not cocked, or is it blocked
maybe? Any ideas? Before the new buffer, spring and bolt catch it
did not misfire once with 300 rounds fired. So something I did has
messed things up. Here is a photo of the relevant parts as of now
(note it was clean before I did my test firing; click on the image to get a hi-res version):
clandestine
AR-15 Savant
Sounds like the trigger pack is the issue. Those pack triggers are not reliable in my experience. I would put in a standard FCG and troubleshoot.
Theres only 2 triggers I trust in ANY AR. Factory and Geissele
I think the disconnector is hanging up or the hammer is following.
Theres only 2 triggers I trust in ANY AR. Factory and Geissele
I think the disconnector is hanging up or the hammer is following.
But the trigger worked 100% of the time before I broke the bolt catch.
And I think others have had good luck with those POF triggers. I hope so cause that was the one splurge in spending on this gun. And I love the feel of the trigger.
Previous Test Fire Result
I forgot some more history to help in the detective work...
Since Brownells was taking so long to deliver, I test fired the gun
without a bolt catch. So it had the new ST-9X buffer and new flat
wire spring installed. Shot about 100 rounds and it never misfired
at all. So it just makes me think that the new bolt catch is somehow
interfering with the trigger or the bolt.
-Kramer
I forgot some more history to help in the detective work...
Since Brownells was taking so long to deliver, I test fired the gun
without a bolt catch. So it had the new ST-9X buffer and new flat
wire spring installed. Shot about 100 rounds and it never misfired
at all. So it just makes me think that the new bolt catch is somehow
interfering with the trigger or the bolt.
-Kramer
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