All,
I assembled a 7.5" pistol build that is having some problems. I am going to list out all of the components and factors as well as the results from several tests at the range last night. I’d greatly appreciate if you all would help me diagnose the problem it has feeding.
Build:
Odinworks 7.5" .223 Wylde Barrel with Low profile gas block (Note 1 below)
KAK flask can (larger one)
Black pistol length gas tube from Rainier
Anderson Upper and Lower (Note 2 Below)
PSA Lower Parts Kit
KNS Antiwalk pins
PSA BCG
KAK shockwave tube and brace as well as buffer tube, buffer, and spring
Aero 9" keymod handguard
Note 1: I had this barrel professionally coated. The guys have coated tons of gun stuff before and their reviews were great. My wife was nice enough to grab the barrel for me when it was ready since their shop is on her drive home. However, these dumb@$$es coated the barrel extension AND the inside mouth of the extension including the feedramps! Needless to say I was pissed. So I got the dremel out with the light buffer pad and removed all I could. When doing this, I think I removed a little bit of the metal on one of the feed ramps. I am not sure, and the polisher I was using SHOULDN’T have removed it, but it may have.
Note 2: So after the aforementioned barrel issue, I go to assemble the upper and the feedramps on the barrel don’t line up well with the feedramps on the Anderson upper. I bang and pound in an attempt to make sure the barrel is seated as far as it’ll go in the upper, and it still isn’t great (not surprising). However, the barrel feedramps don’t extend over the ramp edge on the upper, so the rounds shouldn’t have had anything to catch on.
Now onto the range results.
First test: 1 round of 5.56 green tip in a Lancer Warfighter mag. Insert mag, chamber, gun goes boom (and is pretty accurate as well) and the bolt locks back on empty mag. Repeat this with 2 more rounds of 5.56 green tip, then do the same with .223 PMC and Wolf Gold. All fire, extract, and lock bolt back perfectly.
Next test: load 3 rounds into Lancer mag and fire semi rapidly. All 3 rounds are of same ammo type. For all 3 ammo types, each round is easily fired in a somewhat rapid pace, and all go bang and extract perfectly. On the last round, the bolt does NOT hold open for any of the ammo types.
Final text: Full mag of several types of ammo. By this time, whether the weapon being dirty is a problem or something else, I have no idea. But what happens is, fire one round, it extracts fine, but does not chamber next round. The next round doesn’t get hung up, nothing. Recharge, fire and extracts just fine, and same thing, next round doesn’t chamber.
Unfortunately, I ran out of time and didn’t get to start at the beginning and see if things getting dirty impacted the first two tests. Any thoughts? I can get some pictures sometime this week or weekend. Thanks M4C!
