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Posted: 2/17/2007 2:27:25 PM EDT
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I finshed this low budget build a few weeks ago finally got to go shoot it today, it did pretty well. These are the two types of ammo that it likes. It realy hates wolf wont feed for some reason keeps jammin. I took it to a hundred it did so so. I have to get rid of that shity scope and butt stock. Gives me a whole lot of ideas for the next build.hhttp://i77.photobucket.com/albums/j60/nohander_nolander/108_0874.jpg http://i77.photobucket.com/albums/j60/nohander_nolander/113_1327.jpg http://i77.photobucket.com/albums/j60/nohander_nolander/113_1326.jpg |
1. Insert empty mag. Pull CH fully rearward and release. Does it stay back? If not - you have a defective mag, bolt catch, or buffer tube issue. 2. If #1 works every time - lets move on to short stroking/binding. First, clean and lube with CLP, and NOTHING else, per the TM. That solves most of these problems. 3. If #2 doesn't work... insert 1 round into mag. Fire. Does bolt lock back? Only use M193 spec ammo for this test on a new weapon. It is common to shortstroke using Wolf or other underpowered ammo when breaking in. If it fails to lock back on good ammo, then you have a gas system leak, or binding. Pull back on CH slowly and ride it home slowly. Does it bind or feel rough at any point? Is your buttstock tube vented? That 24" barrel/rifle gas system may not like a carbine buffer system, but it should be able to work fine. Who made the barrel? Bolt carrier? Check the bolt carrier gas key screws, ensure they are tight, and properly staked. |
I like the "Low tech" look
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Normal. Carbon will fill that up over time and it will go away. Typically, unless something is wrong (like a uber cheap aluminum gas block that is eroded, or a totally blocked port) these signs are nothing to worry about. Without the known quality of the barrel... it is hard to know if the gas port is the correct size, or if there is anything else going on. I would simply clean and lube per the TM with CLP (and nothing but CLP) and then go put 100 rounds of good quality M193/M855 spec ammo through it... and test periodically with the bolt-hold back, and measure your results. PS - you didnt answer #1. ?? |
| your gas block aligned right? it might be on right, but you might have to pull forward or rearward to get the hole in line! if your all the way against the thicker part of the barrel in the back your to far back especially if thats a Model 1 or Armalite gas block. Think when you have handguards theres a plate there, doent look like much but that little bit can make a big diff. |
That is an armalite style gas block. Typically - the port in the block is large enough, so that it will allow you to shoulder it right up to the barrel, and still not cut off any of the gas from the barrel port. However, you do bring up a good point, and it should be checked. I personally always measure them with calipers and stand them off just a bit. Armalite, will install a washer to accomodate the space: Worth investigating for sure.  You can clearly see all the leakage present on this barrel... and this barrel has never, ever, had any sort of malfunction. |
| I use a can of PC compressed air and shoot it down the gas tube until is sounds like it has the least resistance and good flow. Seems to work well and is fast, never had a problem even fixed a buddies FTF problems for him. Give it a try it is sooooooo easy you will slap yourself, I did when I asked myself "How the Hell does this work?" As I looked up and saw a can sitting on my desk and was like duh, lol. |
Thanks for the pic. 1000 words question #1 Yes the bolt holds open when a mag is in. It is a model 1 gas block 1913, This is great info. I am going to look for one of these gas block washers, as I bet the problem is miss allignment. I guess this is another good reason for me to buy a new tool, I have been wanting to get a caliper gauge for awhile...Cant wait to get back to work on it Thanks again |
where to get the washer? |
Another way that’s just as easy is to put a small vacuum hose on the end of the gas tube, put the muzzle up to your ear and blow on the hose. You can turn the gas block until you hear the most air. Then tighten it down. RADDAD taught me this in one of his coherent moments. |
I dont know what kind of break it is. The barrel and comp/break I bought off of gun broker Thats another topic I have going, trying to get some info on it. The guy I bought it from won't tell me shit.
Wish I knew, I looked around and decided to just measure and space it by hand. |
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