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The buffer spring is too short for a standard carbine spring. Did this 9" spring come from DD?
NRA Lifetime Member
Firearms and Diesel Trucks....the left's worst nightmare!
After looking at the pictures I would take off the Magpul B.A.D. Lever for future testing. Can you measure the buffer spring again? If it's an unknown mfg. I would put a quality spring in.
Copied from another M4C post.
From:
TECHNICAL MANUAL
ARMY NO. 9-1005-319-23&P
AIR FORCE TO 11W3-5-5-42
RIFLE: 11 3/4 Inches (29 85 cm)
minimum to 13 1./2 inches (34 29 cm)
maximum
CARBINE: 10 1/16 inches (25.56 cm)
minimum to 11 1/4 inches (28.58 cm)
maximum.
NRA Lifetime Member
Firearms and Diesel Trucks....the left's worst nightmare!
Just curious, since none of us have asked, will the rifle lock back on an empty mag when you hand cycle it?
ok 2 things and this answers for others too First the spring is unknown and if i put a larger spring.. say 10-11'' in it ( i would assume) it will increase forward tension ....thus increasing my issue.....AND
Second the bad lever was off for most of the time shooting i pretty much put it on there the last 100rnds.... but I WILL TAKE IT OFF UNTILL I GET THE problem solved...(it cant be helping)
Also should i just buy a DD buffer AND spring?? any good companies with a good price...that i can even get my hand out lol
??????
so the pics of my front sight/gas block you can see the blow back rusty leaking crap around it ....
as i do not lube my gas block ..lol... im pretty sure this has a lot to do with my problem...
im just not sure what i can do or where to start with fixing a leaxking gas block...
the gun shop i bought the upper from said they have to test fire the gun..w/e and they cant look at it till next thursday or friday...no real big deal but i dont think broken stuff..or half broken stuff
Pictures are worth 1000 words.
Now we can get somewhere.
PIC1
I'll bet the problem is with the spring.
It's too short and looks like it has too many coils.
PIC2
This is doing it wrong.
The bolt needs to be in the forward position with the carrier all the way back.
Then check for .250" clearance behind the catch.
PIC3
This shows there is NOT nearly .250" clearance.
The spring is probably at its stacked height, preventing full travel.
To verify the spring is the culprit, remove it.
Put ONLY the buffer into the receiver extension tube.
Reassemble the upper and pull the charging handle all the way back.
If you get the .250" clearance, you've found the problem.
Gently bounce the rifle straight down on the flash hider to return the carrier forward and allow removal of the upper.
Then order two quality carbine springs from Bravo Company or G&R Tactical.
Black River Tactical
BRT OPTIMUM HFCL Barrels - Hammer Forged Chrome Lined 11.5", 12.5", 14.5"
BRT OPTIMUM Barrels - 16" MPR, 14.5" MPC, 12.5" MRC, 11.5" CQB, 9" PDW
BRT EZTUNE Preset Gas Tubes - CAR and MID
BRT Covert Comps 7.62, 5.56, 6X, 9mm
BRT MarkBlue Gas Tubes - BRT EXT, EXC and PDW Lengths
BRT MicroPin Gas Blocks - .750" & .625"
BRT MicroTUNE Adjustable Gas Blocks
BRT CustomTUNE Gas Ports
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