MY PRECIOUS! New AR-15 build

[murphyrj]

Yep, just got a reply email from Midwest Ind., it is an aluminum barrel nut. My next step is to email Osprey and ask their opinion (which may be biased in their favor).

 

[griff383]

Nice build, I too recently finished my first build as well. The gun went bang first time and then I started to breathe again.

I used the rifle length MI SS handguards and love em, will probably use them on everything from now on.

 

[griff383]

FWIW I tried the AA piston kit with the same handguard (rifle length), didnt work. Tried everything to fix it, nada. Ended up using the good ol gas system and now it runs like a champ.

 

[Birddog1911]

That's a good looking build. Just keep an eye out for carrier tilt, and wear on the inside of the upper receiver from such. If you should decide to pull the piston kit, you'll still have a nice running rig.

 

[TonyAngel]

murphy, although emails work, you should just call and talk to Corey (I think is his name). He's a good guy that knows what he's talking about. If you can get the Osprey system working in a configuration that you like, I'd go for it. Running it drastically reduces the amount of crud that builds up in the upper. This is one of the pros of using the piston system.

The cool part of the AR platform is that you can change configurations to suit your needs/mood.

 

[murphyrj]

although emails work, you should just call and talk to Corey (I think is his name). He's a good guy that knows what he's talking about.

I talked with Corey. He made an op-rod that fits with the Midwest Industries SS handguard that I have. I have that Op-rod. Also, he informed me that they changed the design slightly so the operation isn't as harsh, using less gas. I asked him about damage to the barrel nut and He said it won't be a problem, maybe after (i think he said) 50,000 rounds I'll see some wear.

So it looks like they have adressed some of the problems we've been discussing in this thread. Cory said they had the design changes since February.

I'm gonna leave the gas piston on and run a couple hundred rounds through her, then check the results.

I did order the rolling cam pin though.....

-murf

 

[kwelz]

A couple hundred rounds won't tell you much. Run a couple cases to be sure.

 

[TonyAngel]

murphy, that's good news. I really didn't think that my systems were that old, but still, good news. It also appears that their redesign may also address the issues brought about by overgassing, ie, the upper receiver wear due to contact with the cam pin.

I'd stick with it. My Osprey runs like a clock and the handguards don't get overly hot because the system doesn't vent. I might call them to see about updating my stuff too. Thanks for the info.

 

[murphyrj]

I'm running into an issue. My gas block has moved slightly forward over time due to the opposite reaction forces from the gas piston. The gas block is held on with "C" clamps only, no pins. There is a dimple on the underside of the barrel, opposite the gas port, which could be used to retain a set screw or something. Does anyone have any recommendations for keeping the gas block from moving. Please don't say, "Get rid of the Piston System".

I'm thinking of having a machinist or armorer drill and tap a hole in the rearmost clamp and inserting a set screw or pin which will fit in the dimple.

Opinions??

The Murf

 

[kwelz]

I know you said not to say it but.... Get rid of the piston.

Failing in that then your best bet is to find a real gunsmith who can pin it.

 

[MCMXI]

I know you said not to say it but.... Get rid of the piston.

Blaming the gas piston for this issue is lame. I have four ARs, two DGI and two GP, and all of them have pinned gas blocks. Personally, I'd drill and tap the gas block myself and be done with it but if you're not confident doing that, pay a gunsmith.

 

[murphyrj]

thanks