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Posted: 6/11/2005 3:03:45 PM EDT
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I just complete my second AR build took the gun to range today and I'm have a few problumes 1. it will not load the second round into the chamber 2. It sometime runs the next round straite not up into the chamber I tried two different bolt groups and a few different mags here is what my build is made up of Colt 20" HBAR 1/9 twist RRA flat top upper Colt Carry handle A2 Stag complete A2 lower Colt half circle bolt group and a RRA bolt group any one got any input thanks John [email protected] also I was useing Wolf 55gr FMJ amd Winchester white box 55gr Ammo |
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Rifle is short stroking, www.ar15.com/forums/topic.html?b=3&f=66&t=187105 |
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Is the second round on the left side? Is it doing it every other round for the entire mag? When it started doing it on my M4gery, it turned out that the rounds were hitting an exposed lip on the barrel extension and not feeding from the left. I'd say to check and see if your feedramps are nice and smooth before you start diving into something more expensive. Just my $.02, WIZZO |
Yes and Yes thanks John |
I am using USGI mags as well as Colt mags both 20 and 30 rounders I just replaced the gas tube and gave it a good cleaning and am going to take it the range tomorrow |
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already answered your IM but I'll post here for others reading this thread drop a round in the chamber, drop the bolt with the muzzle in a safe direction, press on the bolt catch, fire the round with the rifle in minimum contact with the body (unrestrained firing, as it says in the milspec) it's best if you fire with only one hand on the pistol grip and your finger on the bolt catch. repeat several times the bolt should lock back each time. this pic started out as a joke (note Nomex gloves and shooter facing away) due to the problems we were having with this BFI build but it shows the basics. 
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OK I finaly made to the range here what went down I did the short stroke test. as stated above I did it 6 times- 3 times with no mag in the gun and 3 time with a mag in the gun all 6 time the bolt DID NOT hold open PLEASE HELP  what is the problemthanks John [email protected] |
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are the carrier key screws tight? can you blow through the carrier key? gas tube rull pin present? squirt some aerosol down the gas tube and see if it comes out in the bore, short strokes are covered in the FAQ but it's harder to search now that the Subject List disappeared. 
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