[weambulance]

Well, you can get an Aimpoint if you just want a zero-trouble solution that's faster, easier, and more precise than irons. I'm not sure what your experience level is, but a good red dot is a major improvement over irons. If a good 1-4x optic is a 10, for the typical user an Aimpoint is an 8.5. It might not be worth it for you to dick around with setting up a variable power optic right now.

Things get complicated with regular scopes mainly because of eye relief, short length of pull, and the fact that the stock is inline with the receiver, which requires a relatively high mount for comfort compared with most other rifles. You can solve the forward mounting problem by going with a monolithic upper receiver, but it's not exactly the economical choice.

What exactly is happening with your cycling problems?

[porscheguy]

(03-28-2016 07:37 PM)weambulance Wrote:  

Well, you can get an Aimpoint if you just want a zero-trouble solution that's faster, easier, and more precise than irons. I'm not sure what your experience level is, but a good red dot is a major improvement over irons. If a good 1-4x optic is a 10, for the typical user an Aimpoint is an 8.5. It might not be worth it for you to dick around with setting up a variable power optic right now.

Things get complicated with regular scopes mainly because of eye relief, short length of pull, and the fact that the stock is inline with the receiver, which requires a relatively high mount for comfort compared with most other rifles. You can solve the forward mounting problem by going with a monolithic upper receiver, but it's not exactly the economical choice.

What exactly is happening with your cycling problems?

I was going to mention this was an issue with the AR design. Years ago when the vast majority were sold with fixed carry handles, any optics had to have a mount that fit into the carry handle. Then you faced the problem of having the optic sit too high. The solution was the Cherokee Delta Cheek Riser. I've actually got one rattling around in my box of old gun stuff.

[Rush87]

He hasn't aged since the 1600's. Perhaps he'll finally hit the wall in 2200.

[Avant-Garde]

Was his pistol work on 'John Wick' krav maga? Close quarters, short, quick, to the point.

[Avant-Garde]

(03-04-2016 04:09 PM)Shrodax Wrote:  

Watch this video of the different styles between a competition shooter and a Delta Force veteran:

'Slicing the pie'. The competition shooter looked like he was doing a 100 yard dash.

[kaotic]

(03-28-2016 07:00 PM)porscheguy Wrote:  

Who made your upper? Didn't you post a thread showing your build and finishing of your 80% lower? Did you have it anodized? Cerakote?

I can tell you via PM, that wasn't my AR I know it was someone elses on the forum in the "Post a Manly Thing You Did Today" Thread.

(03-28-2016 07:37 PM)weambulance Wrote:  

What exactly is happening with your cycling problems?

At first I thought it was shitty ammo also - then it's not cycling on decent ammo as well.

Mag goes in, bolt slides forward and loads - bullet fired.

Bolt goes back and doesn't load the next round in at all OR occasionally it jams a bit like this aka "failure to feed":



(note: not my rifle)

IF it doesn't load the next round, pull back charging handle, load, fire, same problem.

In the above picture, yell misfire, drop the mag, clear the stuck bullet.

A few experienced shooters told me it could be my bolt carrier, gas block, and/or the buffer weight.

[porscheguy]

Send me a PM and tell me what kind of upper you've got. I will assume that you bought an assembled upper and just dropped it on your lower. Although the gas block is dirty, it's a reliable system. If it was a factory assembled upper, I doubt it's the cause. The buffer probably isn't the cause either. Your problem is most likely the bolt/bolt carrier. The first thing is to make sure it's clean and there's no excess buildup of powder residue. For really caked on powder, you can buy a "BONE" tool (google it.) If that doesn't correct it, you may have the same issue I had, and the best way around it is to replace the whole BCG. Also make sure the gaps on the gas rings aren't all lined up.

Basically, if your bolt is too tight in the BCG, it takes more energy through the gas tube to get the bolt to unlock, so there's less energy to push the BCG assembly back far enough. It may go back far enough to eject the old shell, but if the buffer spring isn't compressed enough, it won't accelerate the bolt forward with enough force to strip, chamber, and lock the next round.

You can always take your BCG to your preferred gun shop, explain the problem you're having, and ask if they'll let you see a BCG from one of their nicer guns. Compare how easily the bolt moves in theirs vs yours. You should quickly know if you've got a problem or not.

[weambulance]

Short stroking can be caused by lots of different stuff. Pretty hard to diagnose without having the rifle in hand. Read the first couple posts here.

I doubt you need a heavier buffer, though. I'm assuming you're not using something even heavier than an H3 now.

What it boils down to is you're losing energy somewhere in the system such that the bolt/bolt carrier aren't getting enough rearward motion to pick up a new round, or strip a new round cleanly if the bolt does clear the rear of the magazine (because not enough energy was stored in the buffer spring). So, you're:

- not getting enough gas pressure to begin with (possibly too-small gas port in the barrel--unlikely, usually they're too big--or a misaligned gas block which is effectively a too-small gas port because it's blocking part of the barrel port)

- or losing the gas somewhere from a leak (poor seal somewhere in the gas system, probably at the carrier key but it could be anywhere two parts come together)

- or something is dragging (magazine fits wrong, something fucked up in the bolt carrier group, or lack of lubrication combined with lots of fouling)

...or a combination of any of those things such that a bunch of small problems stack to make your rifle fail.

Has it had this problem from day 1, or did it develop over time? Does it get worse when the rifle warms up?