Direct Impingement Vs. Piston System AR-15?

[Vanilla Gorilla]

Most of our classes are in Robert, La on the North Shore.

 

[Pviator23]

sounds good that isn't to far from me. and i looked at your guys schedule i like the idea of a course in december when it cools down.

 

[doc ace]

EOTech, correct me if I'm wrong but at approx 50 m their head is in the ring, approx 150-200 meters their torso and approx250-300ish their whole body? That was how I ranged targets, but I was only a medic, not a weapons expert.

 

[Vanilla Gorilla]

That's a simplified ableit effective way to use the ring to range.

 

[Jack]

EOTech, correct me if I'm wrong but at approx 50 m their head is in the ring, approx 150-200 meters their torso and approx250-300ish their whole body? That was how I ranged targets, but I was only a medic, not a weapons expert.

If the ring is 65 moa and 1 moa is 1.047" @ 100 yards the ring is 68" @ 100 yards, 34" @ 50 yards, and 136" at 200 yards. In my head I've always done ring = average person size @ 100 yards. Dot to ring edge=average person size @ 200 yards.

Do you mean if you put the dot on someone's chest and their head is in the ring it's 50m?

 

[doc ace]

If the ring is 65 moa and 1 moa is 1.047" @ 100 yards the ring is 68" @ 100 yards, 34" @ 50 yards, and 136" at 200 yards. In my head I've always done ring = average person size @ 100 yards. Dot to ring edge=average person size @ 200 yards.

Do you mean if you put the dot on someone's chest and their head is in the ring it's 50m?

Roger center dot on center mass, lower it a tad the further out I'm reaching

 

[Jack]

Roger center dot on center mass, lower it a tad the further out I'm reaching

Cool, thanks for the info.

 

[Pviator23]

Would a bcm upper put on a spikes lower run great along with being light weight? It is a 16 Inch upper not the lightweight, version and a spikes punisher lower enhanced?

 

[tikanni]

Would a bcm upper put on a spikes lower run great along with being light weight? It is a 16 Inch upper not the lightweight, version and a spikes punisher lower enhanced?

I'm sure it would be. If you want to make it more lightweight, get the barrel cut down to 14.5' and have a flash hider/muzzle brake pinned and welded to make it legal. But I'm not into lightweight, I'm into heavy HE-MAN rifles.

 

[SpeedRacer]

Would a bcm upper put on a spikes lower run great along with being light weight? It is a 16 Inch upper not the lightweight, version and a spikes punisher lower enhanced?

The lower is mostly moot. The upper and BCG are where quality matters. BCM is good. I'm a fan of lightweight barrels but it's not necessarily a dealbreaker.

 

[Pviator23]

do the light weight barrels have any effect on accuracy?

 

[Vanilla Gorilla]

Not with the type of shooting you are planning to do or in semi only fire.

 

[Pviator23]

what about between the 14.5 and 16 inch barrels?

 

[SpeedRacer]

what about between the 14.5 and 16 inch barrels?

I prefer 14.5" but the difference isn't that much all said and done. If you like to tinker and plan on swapping out rails and muzzle devices stick with the 16".

 

[Vanilla Gorilla]

what about between the 14.5 and 16 inch barrels?

The difference in accuracy potential between 14.5" and 16" is negligible.

 

[dixiejarhead]

Check out Primary Weapons Systems. The MK114 is a great piston gun and the weight is not bad either. 6lbs, 8oz.

http://primaryweapons.com/store/pc/viewContent.asp?idpage=17

On the SRS, they wash bad. I would avoid. Stick with eotech or aimpoints.

 

[Jack]

no eotech, either an aimpoint t-1 or a trijicon srs. maybe a 1-4 trijicon if i feel the need but as of now most likely will go with a red dot. and i am leaning towards bcm or just doing a
compete build. i reallly like the idea of the bcm jack but they seem impossible to get. i saw one on gunbroker.com for 2700.00 a little rediculous compared to the 1900.00 price i have seen as the msrp.

If you still want a jack for some reason...

https://www.rainierarms.com/?page=shop/detail&product_id=3694

 

[fishhawk]

http://thefiringline.com/forums/showthread.php?t=291416