Misc Firearms Crew LXXVI: Headshots for Jesus

[Ikeman83]

It isn't the most deviation, it's actually the least on average for a carbine out to ~300 or so though at shorter range (out to 250) a 50 yard zero will perform better. Marines, Shawn Ryan, Haley, IDF (kind of) all teach / use it. Again Ike, we've talked about this before - we have very different priorities.

Just so everyone can play along and make their own decisions




Measurements for common mount heights (2.6" sight height above bore), 3150 FPS, 55gr bullet loaded to M193 spec

300 yd zero (not meter, yard) is -2.6" to +5" from the muzzle to 300 yds peaking at 175 yds.
200 yd zero is -2.7" to +1.25" from the muzzle to 250 yds peaking at 150 yds. At 300 yds its at -7.2", so it's definitely more total deflection than a 300 yd zero will be, and much more if you're going out to 350 yds (-5 vs -13.8).

A lot of shooters are going to prefer 2.5" of deflection from POA from the muzzle to 250 yds to 5" from the muzzle to 350. It's no surprise at all that the USMC, IDF, Haley (USMC) etc use a 36/300 yd zero. That doesn't mean that I don't still find 5" of deflection gross, LOL.

[blumpkin415]

Army still stuck on that 25 meter zero

[otakutrevan]

WILL REP FOR THIS QUESTION ANSWERED

DSArms Ar15 uppers. chrome lined. 14.5 bois. 1/7 twists. They seem to meet all the DOD requirements (im doing a M4 clone). Are they "over gassed". Everything is sold the **** out due to the kung flu.

[Farley1324]

WILL REP FOR THIS QUESTION ANSWERED

DSArms Ar15 uppers. chrome lined. 14.5 bois. 1/7 twists. They seem to meet all the DOD requirements (im doing a M4 clone). Are they "over gassed". Everything is sold the **** out due to the kung flu.

What is bolt made from? What is buffer weight?

[NuggzTheNinja]

WILL REP FOR THIS QUESTION ANSWERED

DSArms Ar15 uppers. chrome lined. 14.5 bois. 1/7 twists. They seem to meet all the DOD requirements (im doing a M4 clone). Are they "over gassed". Everything is sold the **** out due to the kung flu.

Carbine gas is almost always overgassed but it matters a lot more if you're shooting suppressed, otherwise doesn't matter really. My go-to rifle is a carbine gas LMT.

[otakutrevan]

What is bolt made from? What is buffer weight?

Bolt Specs:
9310 Super Alloy Steel (7% stronger than Carpenter No. 158® Steel).
MPI Bolt (Magnetic Particle Inspected).
Hardened Steel Extractor.
Heavy Duty Extractor Spring.
Black Extractor Insert.
Mil-Spec O-Ring.
Milspec Gas rings (3).
Parkerized exterior.

Bolt Carrier
Proper 8620 steel
Shot Peened
Chrome Lined
Properly Staked Chrome lined Gas Key
Grade 8 Gas Key Screws
Heavy Duty M16 design
Parkerized exterior

Cam Pin
Hardened Steel
Parkerized exterior

Firing Pin
Hardened Steel
Chrome Plated


Firing Pin Retaining Pin
Hardened Steel
Black Oxide Exterior

Carbine gas is almost always overgassed but it matters a lot more if you're shooting suppressed, otherwise doesn't matter really. My go-to rifle is a carbine gas LMT.

LMT is pricey mane >_>

[Ikeman83]

WILL REP FOR THIS QUESTION ANSWERED

DSArms Ar15 uppers. chrome lined. 14.5 bois. 1/7 twists. They seem to meet all the DOD requirements (im doing a M4 clone). Are they "over gassed". Everything is sold the **** out due to the kung flu.

Go, and sin no more my son: https://bravocompanyusa.com/bcm-bfh-...-13-handguard/

[OfficerJimLahey]

https://forum.bodybuilding.com/showt...hp?t=178295631

Oh the irony.

You talking Cobo? I know someone who is there semi-frequently. Evidently it's set up so that one floor is the higher risk or more severe patients, and the lower floor is lower risk. He said there was about 25 people there yesterday.

The building formerly known as cobo.

Just wandered into Academy and scored 2 45’s and 2 10’s. Really need some 5’s and 2.5’s to start 5/3/1 back up.

Excellent, nice.

[Farley1324]

LMT is pricey mane >_>

"DOD specs" would call for a Carpenter 158 bolt.

Heat treat is really important on 9310, C158 is much more forgiving. What coating does that bolt have? Nitride?


"Over gassed" is overly-critically-reviewed (what?). Over-gassed isn't a big deal for unsuppressed and a lot of the guys who get hung up on that are trying to finely tune their carbine to the "perfect" soft shooting operation where it's just enough 'gas' to lock back consistently on empty with their chosen ammo, but that might not be the best way to go,

because 'over gassed' gives you more margin for weak ammo, lack of lube, dirty gun, etc. That's why manufacturers over gas so much, so you can shoot cheap weak ammo in an under lubed and/or dirty gun and it will still work. That's not necessarily a bad thing

[Ikeman83]

Army still stuck on that 25 meter zero

Grossest

[blumpkin415]

Grossest

What does the elevation mean?

[Farley1324]

What does the elevation mean?

Pretty sure elevation is projectile location relative to point of aim...and that would be for a 25M zero

[Farley1324]

Why I default to 50y zero (I myself am not overly worried about hitting a target at 200+ yards with my dot sighted long barrel pistols or SBR). But then even the heavy 77gr out of a little 10.5, at 300 it's just aim a little high (still POA on the target) for what should be 'a hit' on a standard target

50 is tightest from 0-250. And the magnified optic on my 16" has BCD reticle

[Ikeman83]

What does the elevation mean?

It's the deflection measured in inches at that distance.


EDIT: Our ballistic calculator can run it in MOA, Mils, or inches depending on what the user wants. For this case inches is most appropriate.


Further Edit: If it looks weird, it's 55gr M193 for a 16" bbl instead of 62gr M855 out of a 14.5" barrel.


I ran M855 at 14.5" velocities and got:

[Ikeman83]

Why I default to 50y zero (I myself am not overly worried about hitting a target at 200+ yards with my dot sighted long barrel pistols or SBR). But then even the heavy 77gr out of a little 10.5, at 300 it's just aim a little high (still POA on the target) for what should be 'a hit' on a standard target

50 is tightest from 0-250. And the magnified optic on my 16" has BCD reticle

Velocity makes a difference on all of these (so barrel length and bullet selection makes a big difference), but the 200 yd zero is roughly 45/200 yds to be dead on for my 14.5 and 16 inch uppers.

I usually recommend a 200 yd zero for hunting rifles for the same reason. If you're taking a fast shot on a close target, you don't want to be thinking about where in the range you are, and if you're further away you have a little more room to compensate. People call in with crazy zero concepts all the time.

[MattyMiscer]

Why I default to 50y zero (I myself am not overly worried about hitting a target at 200+ yards with my dot sighted long barrel pistols or SBR). But then even the heavy 77gr out of a little 10.5, at 300 it's just aim a little high (still POA on the target) for what should be 'a hit' on a standard target

50 is tightest from 0-250. And the magnified optic on my 16" has BCD reticle

Yeah, if I ever find myself in a situation where I need to cap some dude at 300 yards I'll just aim center mass and be confident that I'll at least hit him in the dink

[Bo_Flecks]

Yeah, if I ever find myself in a situation where I need to cap some dude at 300 yards I'll just aim center mass and be confident that I'll at least hit him in the dink

IIRC we had that debate a couple of weeks ago about groin shots for Jesus.

[Ikeman83]

IIRC we had that debate a couple of weeks ago about groin shots for Jesus.

Dick shots are great if you want to stop someone from moving. Bad if you want to stop someone from shooting you.

[gbullock32]

Dick shots are great if you want to stop someone from moving. Bad if you want to stop someone from shooting you.

I dunno, if I ever get shot in the dink I'm done being a threat...

[fishnbrah]

AR is sighted in at about 40 yards for 55gr vmax.

200 or 100 on my hunting rifles, doesnt make much of a difference for what im doing

[MattyMiscer]

Dick shots are great if you want to stop someone from moving. Bad if you want to stop someone from shooting you.

tbh, the beltline is the place to aim if bad guy is wearing plates

[Ikeman83]

I dunno, if I ever get shot in the dink I'm done being a threat...

Depends on whether you can physically feel your dick.

[Tuksonrider]

WILL REP FOR THIS QUESTION ANSWERED

DSArms Ar15 uppers. chrome lined. 14.5 bois. 1/7 twists. They seem to meet all the DOD requirements (im doing a M4 clone). Are they "over gassed". Everything is sold the **** out due to the kung flu.

Not sure where DSArms source their barrels, and gas port size. *shrugs*

If it's an M4 clone you want, you can try building the upper yourself. Good to have tools anyway.

Military over-run on 14.5" with m203 flats. HPT & MPI tested, chrome-lined. $199
https://davidsondefense.com/AR-15-55...ns_p_7450.html
(I know I'll get flak over "davidson defense", but they just buy surplus to resell).

For the upper, I'd go with BCM blem upper $60
https://bravocompanyusa.com/bcm-uppe...emo-scratched/

Get yourself a drop-in handguard and delta ring assembly, you're good to go. (under $30 everywhere)

You'll have to find a way to pin&weld a flash hider.

For a BCG, righttobear.com has AO precision BCG or RTB Premium Phosphate BCGs. Both are phosphate carriers & c158 bolts, HPT & MPI tested (unknown if individual or batch tested). They are usually under $90. OOS atm.

[4ea]

HK just because CoD 4 nostalgia.

HK makes high quality products, but honestly the USP has alot of muzzle flip because of a high bore axis. Id much prefer a glock 21

[Meatie]

Sup ya exotic oriental LON HORIGUCHI heads???

[tunejunkie]

- BREAKING BREAKING - FREEDOM WEEK PART 2 IS UPON CALIFORNIA


looks like the same judge that struck down the mag ban, giving california freedom week, just did the same for ammo.

this allows CA residents to order straight to their doorstep like the good ole days rather than to FFL and background check. or make runs to Nevada and get some ammo

I'm reading more into this now to see more info and what stores start shipping to CA



but for now, can any of you guys recommend me a site with some good defensive 5.56 rounds? I've got okay bulk stash, but need some HD rounds
(yes i know its terrible prices right now)

[Witrebel]

- BREAKING BREAKING - FREEDOM WEEK PART 2 IS UPON CALIFORNIA


looks like the same judge that struck down the mag ban, giving california freedom week, just did the same for ammo.

this allows CA residents to order straight to their doorstep like the good ole days rather than to FFL and background check. or make runs to Nevada and get some ammo

I'm reading more into this now to see more info and what stores start shipping to CA



but for now, can any of you guys recommend me a site with some good defensive 5.56 rounds? I've got okay bulk stash, but need some HD rounds
(yes i know its terrible prices right now)

TargetsportsUSA but only order single item per order. like X number of the same item. Otherwise hella delayed shipping

[Farley1324]

- BREAKING BREAKING - FREEDOM WEEK PART 2 IS UPON CALIFORNIA


looks like the same judge that struck down the mag ban, giving california freedom week, just did the same for ammo.

this allows CA residents to order straight to their doorstep like the good ole days rather than to FFL and background check. or make runs to Nevada and get some ammo

I'm reading more into this now to see more info and what stores start shipping to CA



but for now, can any of you guys recommend me a site with some good defensive 5.56 rounds? I've got okay bulk stash, but need some HD rounds
(yes i know its terrible prices right now)

Buy a 500 round case of IMI Razorcore (77gr SMK 5.56) from sgammo if they still have it.

[tunejunkie]

Buy a 500 round case of IMI Razorcore (77gr SMK 5.56) from sgammo if they still have it.

thanks, looking at it now. looks like their site says they're shipping to CA now

[Farley1324]

thanks, looking at it now. looks like their site says they're shipping to CA now

Pull the trigger on that sht

Now