Issue with my AR pistols

Petar · Aug 30, 2015

Hey guys, need a little help. I have built two AR pistols - one is a 10.5" 223 wylde and the other 9" 300 acc. Both are experiencing light primer strikes. Any suggestions?

jkeys · Aug 30, 2015

Petar said:
Hey guys, need a little help. I have built two AR pistols - one is a 10.5" 223 wilde and the other 9" 300 acc. Both are experiencing light primer strikes. Anay suggestions?

Need more info. What triggers are you using? Are you sure you installed the hammer springs the correct way and not backwards? Have you tried different firing pins? Did you check your headspace?

shaddydan · Aug 30, 2015

Petar · Aug 30, 2015

jkeys said:
Need more info. What triggers are you using? Are you sure you installed the hammer springs the correct way and not backwards? Have you tried different firing pins? Did you check your headspace?

The lowers and triggers are Spikes. I have checked the headspace and it is within tolerance. The trigger springs are installed correctly. Could the buffer and spring make a difference? I currently run H2 on both.

outrider58 · Aug 30, 2015

Shouldn't be the buffers yet. You shooting factory loads? What are you shooting. Did this just start happening, or has it been this way since you built them? How did you check head space? Go-nogo or field?

Petar · Aug 30, 2015

outrider58 said:
Shouldn't be the buffers yet. You shooting factory loads? What are you shooting. Did this just start happening, or has it been this way since you built them? How did you check head space? Go-nogo or field?

Factory loads for both. (Remington). Checked headspace via go, no-go. The light strikes are happening from the start. I shot some small primed Federal 223 and it cycled perfectly.

BradMacc82 · Aug 30, 2015

If you have a set of calipers, check to see how deeply the primers are seated on the Remington ammo. It wouldn't be the first time a batch of ammo had deeply seated primers.

Petar · Aug 30, 2015

BradMacc82 said:
If you have a set of calipers, check to see how deeply the primers are seated on the Remington ammo. It wouldn't be the first time a batch of ammo had deeply seated primers.

Will do...

BradMacc82 · Aug 30, 2015

Firing pin protrusion thru the bolt face: .028" Go, .036" No Go.

Boss94 · Aug 31, 2015

If all else fails try the 7 62x39 firing pins from redx. fixed my light strikes in my 7 62x39 pistol

Petar · Aug 31, 2015

Boss94 said:
If all else fails try the 7 62x39 firing pins from redx. fixed my light strikes in my 7 62x39 pistol

Will the 7.62 pin work in 5.56 BCG?

Boss94 · Aug 31, 2015

Petar · Aug 31, 2015

Boss94 said:
Yes

Thanks, Just ordered 2 from red X. Will give it a try and report

ejholt · Sep 1, 2015

I second Boss94's recommendation. This is the same advice he gave me and it worked! Although it was for a 7.62x39 pistol upper, it took care of the light strikes.

Pushrod · Sep 1, 2015

Have you disassembled the BCG and checked the firing pin for any burrs or other abnormalities. Lube them up good and check their movement with your fingers to be sure they move freely and smoothly. If everything checks good there you may need to try a heavier hammer spring. Again, try using generous lube first.

Petar · Sep 2, 2015

Pushrod said:
Have you disassembled the BCG and checked the firing pin for any burrs or other abnormalities. Lube them up good and check their movement with your fingers to be sure they move freely and smoothly. If everything checks good there you may need to try a heavier hammer spring. Again, try using generous lube first.

Upton inspection of the pins, I found that they only protrude out of the bolt .020. The longer pins I just ordered should fix the problem. Thanks everyone for your help!

44man · Sep 2, 2015

what BCG do you have in there now ?

Petar · Sep 2, 2015

44man said:
what BCG do you have in there now ?

Both Red X Arms Nickel Boron BCG

44man · Sep 2, 2015

Petar said:
Both Red X Arms Nickel Boron BCG

thanks I am about to get 2 BCG's and I wont be getting that brand.

Petar · Sep 2, 2015

44man said:
thanks I am about to get 2 BCG's and I wont be getting that brand.

The bolts overall are excellent and would recommend them. I have also used their uppers on other projects and can say that they make great stuff for the price.

Issue with my AR pistols

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