berettaprofessor
Member
I took out the new Stag LH AR10 (that I described building in a recent thread) to see how it functioned and to get the scope on paper at short range.
Upside; didn't have to touch the scope adjustment (see pic). First shot at 15 yards was on a 1" stickie dot, and 7 others kneeling weren't far off at 20 yards, so I decided to wait till I can get to a 100 yard range. If I can shoot it kneeling like this, all while wondering if the first few shots will blow me up, I'm excited to see what it will do when it's benched at 100.
Downside: it's a single shot. Chambered fine loading from magazine every time, and it seemed to extract and eject perfectly (empties about 4 feet back and left 3 feet from the LH ejection port and no marks on the brass), but every "auto-self-load" jammed the second round between the chamber and bolt. So I have some questions:
1) In my limited experience, I would guess that the bolt is cycling too fast, moving back forward before the round can load, and the rifle is overgassed. Is that likely correct?
2) I'm guessing that shooting it a bit more to "give it a chance to loosen up" won't help?
3) I used a low-profile gas block and rifle length gas tube on an 18" barrel. I know that in the previous thread, BFOOSH006 suggested using an adjustable block, but I already had this one ordered at that time (sorry bfoosh006). Should just I bite the bullet, order an adjustable block, and swap it out?
4) If it's not the gas block, what else can I try? I was only using one magazine, but it was a new Magpul AR10, 10 round mag, so maybe a different mag? I only loaded a maximum of 2 rounds at a time. The buffer tube/buffer/spring is a standard AR10 set ordered from Stag and I can't find any other buffer weights specifically for AR10 builds. I did have a LimbSaver pad on the butt; can that be interfering with function? The ammo was cheap Federal Power-Shok 150 grain.
Upside; didn't have to touch the scope adjustment (see pic). First shot at 15 yards was on a 1" stickie dot, and 7 others kneeling weren't far off at 20 yards, so I decided to wait till I can get to a 100 yard range. If I can shoot it kneeling like this, all while wondering if the first few shots will blow me up, I'm excited to see what it will do when it's benched at 100.
Downside: it's a single shot. Chambered fine loading from magazine every time, and it seemed to extract and eject perfectly (empties about 4 feet back and left 3 feet from the LH ejection port and no marks on the brass), but every "auto-self-load" jammed the second round between the chamber and bolt. So I have some questions:
1) In my limited experience, I would guess that the bolt is cycling too fast, moving back forward before the round can load, and the rifle is overgassed. Is that likely correct?
2) I'm guessing that shooting it a bit more to "give it a chance to loosen up" won't help?
3) I used a low-profile gas block and rifle length gas tube on an 18" barrel. I know that in the previous thread, BFOOSH006 suggested using an adjustable block, but I already had this one ordered at that time (sorry bfoosh006). Should just I bite the bullet, order an adjustable block, and swap it out?
4) If it's not the gas block, what else can I try? I was only using one magazine, but it was a new Magpul AR10, 10 round mag, so maybe a different mag? I only loaded a maximum of 2 rounds at a time. The buffer tube/buffer/spring is a standard AR10 set ordered from Stag and I can't find any other buffer weights specifically for AR10 builds. I did have a LimbSaver pad on the butt; can that be interfering with function? The ammo was cheap Federal Power-Shok 150 grain.
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