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Posted: 12/20/2010 8:59:25 AM EDT
[Last Edit: RTUtah]
Originally Posted By PSYWAR1-0:

The Recce platform was something that sprung up within the NSW and 5th SFG communities that first became the Special Purpose Receiver built by Crane, which was supposed to be installed on any M4 lower. After a time when the perfect storm of the users wanting a match-grade trigger and the bolt-bounce issue was identified, the Special Purpose Receiver morphed into a complete rifle that was type-classified as the Mk12.

Mk12: A BRIEF HISTORY (as authored by "LGT" & "FL")

Mk12 Special Purpose Rifle (SPR)

Scoped versions of the M16 rifle existed as far back as the 1960s. Like nearly all historic military rifles, the M16 went through decades of efforts to improve its accuracy, both in the military and civilian marksmanship communities.

The need for the SPR dates back to the late 1980s and early 1990s when the 7.62mm M21 sniper rifle, a semi-automatic weapon of Vietnam vintage, was replaced by the M24 sniper rifle, a bolt action weapon. The M24 was originally specified to be a .300 Winchester Magnum, but the Army decided to field it in 7.62 NATO for a variety of economic reasons. This left the M24 in the unenviable position of being the worst of both worlds in the eyes of snipers at the time, since it lost the fast-shooing, semiautomatic capability of the M21, but did not gain the range advantage of the .300WM. This compromise left a vacant requirement for a fast-shooting semi-automatic sniper rifle. This need was most apparent in the US Army Special Forces (SF) community, since the other commands within the Special Operations Forces structure filled that need with Knights Armament Corporation's SR-25 sniper rifle.

Army SF, being prohibited by its leadership from procuring the SR-25, sought the next best alternative, namely a Special Purpose Receiver (SPR) kit to convert the Army SF M4 carbines into highly accurate rifles. In late 1998, at the request of SFC Steve Holland of 5th Special Forces Group, and the approval of the SOPMOD joint IPT, the Special Operations Peculiar Modifications (SOPMOD) Program Manager, Troy Smith, authorized the purchase of 5 sets of commercial items as an SPR experiment.

The original requirement was for USASOC, mainly the SF Groups, as WARCOM had the MK11, 7.62mm system. Once the SPR requirement was developed and demonstrated through experimentation, most of the other commands in USSOCOM added themselves to the Basis of Issue Plan (BOIP). The USSOCOM requirement for the SPR, with improved ammunition, was approved in July 1999, as part of the SOPMOD Kit, Operational Requirements Document, Version 5 (ORD 5).

Further initial development included several variants of the SPR and new ammunition that were compatible with the M4 carbine's lower receiver. It was found that standard issue M855 5.56mm ammunition was not consistent enough to meet the requirement. In 2000, based on an upgrade requirement to provide a match-grade trigger to the design, Mr. Paul Miller, the SPR project manager, discovered an opportunity to pick through over 15,000 M16A1s that had been sent to Crane for destruction. Realizing that these M16A1 rifles, some of which were virtually new, could be used as "free lumber" to build full SPR weapons, Paul selected several thousand rifles to be set aside for the new SPR project. The SPR underwent a minor but significant name change, with the R having originally stood for "Receiver" now standing for "Rifle"

The new weapon system was worthless without a matching round of ammunition to obtain the performance required. The PEO-SP USSOCOM authorized the new round that became Mk262 as part of the Mk12 system in August 2000. Paul Miller and his SPR team refined the 77-grain prototype ammunition and built approximately 124 SPR Rifles in the summer of 2001. These were finished just in time to ship out to Army SF in late October 2001, to be used in the first invasion of Afghanistan. The SPR rifles were extremely well-received, and the SOF combat units ordered hundreds more.

In May 2002, USSOCOM removed the Mk12 and other complete weapons projects from the SOPMOD Program and placed them under the newly-formed USSOCOM Weapons Program. The fielded weapons included two versions (Mk12 Special Purpose Rifle Mod0 and Mod1). Fielding has since been structured for Mk12 Mod1 Special Purpose Rifle only. This rifle is used by Joint USSOCOM Commands and the USMC in combination with M262 (AA53, 77 grain) ammunition. Formal fielding of the full-rate production version of the Mk12 rifle and ammunition occurred in May 2003 and was completed in FY '04.

In 2012, as the decade of war on terrorism was winding down and the SCAR weapon system began replacing the requirement for the Mk12, USSOCOM and Naval Special Warfare divested themselves of the Mk12 weapons system, and the Mk12 is now being looked at to fill a Designated Marksman Role within Brown Water Navy commands.
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* * * * * * * * * *

The following parts lists and substitution parts was compiled by lancecriminal86 over the course of a LOT of research. Read up and pay attention!

Below are the 100% .mil-spec parts lists to build a true SPR or Mk12 clone. Some of these parts are no longer manufactured and will require much effort and money to locate through forums and online brokers. Keep in mind the rifles were built off donor M16A1s, hence the prevalent A1 parts in the lower receivers and the BCGs. They were also first configured using parts available from 1998-2004, and most are inferior in some ways to newer designs. If this bothers you too much, STOP NOW.

The rifles were issued as a kit in a Pelican 1700 case with cutouts. The kits included the rifle with suppressor, optic, bipod, an Eagle TAS-1 UMSS sling (unobtanium and also absolute crap), with a Dewey 1-piece cleaning rod plus Otis cleaning kit, and a cutout for magazines. An operator's manual was also included, however these have not been officially released for public consumption. However, the manuals are out there, and some companies building Mk12 uppers include one. Whether these are official .mil operator's manuals or specially made is currently unclear as the manual itself still contains language that it is not for distribution.

- Alternate .mil-spec parts due to NFA, NLA parts, or changes in name/markings for current production in [brackets]

- Extra notes about parts or availability are in (parenthesis)

LOWER
Lower receivers were standard across the SPR/Mk12 variants and the only variations would be between grips, stocks, and buffers. Most were marked either Colt or GM Hydramatic. All other parts were the same in regards to the lower parts. One caveat is the trigger, as the program originally selected the Knight's Armament 2-stage Full Auto Match trigger. Later on, some issues regarding negligent discharges occurred, and Geissele SSF triggers ultimately found their way into the Mk12 family. Whether 100% of all Mk12s eventually received the Geissele trigger isn't clear, so either is acceptable.
  • Lower: M16A1 pattern [Nodak Spud NDSA1 or 80% re-profiled/finished/engraved]
  • Trigger: Knight's 2-Stage Full Auto Match Trigger or Geissele SSF [KAC semi-auto Match or Geissele SSA/SSA-E]
  • Grip: A1, A2, ERGO Original
  • Stock: Originally issued with A1 stocks, both solid D and trapdoor E types; as A1 stocks dwindled, A2 were used; ModH rifles rebuilt with Ace SOCOM stocks
  • Small parts: Standard M16A1 parts

UPPER
The upper receivers, which ultimately differentiate the four variants of the Mk12, have the most variation between each other.


Early SPR/Mod0
  • Upper: Colt, Diemaco, or Armalite marked, flat top, M4 feed-ramps
  • Barrel: Douglas 416r SS, 18" SPR contour, 1/7 twist, flats milled for PRi FSB (Compass Lake, Centurion Arms, High Caliber Sales, and PRi can all supply barrels that meet the appropriate spec minus FSB flats)
  • BCG: Colt M-16
  • Handguard: Precision Reflex Gen I carbon fiber free-float Handguard, rifle length (identified by button-head screws and one vent hole near barrel nut on lower half; no heat shields)
  • A.R.M.S. #38 SPR MOD Sleeve (either the PEQ version or with uneven spacing on the front  but not the full 1913 railed version)
  • FSB: PRi early folding front sight base and gas manifold, set-screw, with elevation wheel
  • Charging handle: PRi Gas Buster M-84 with military latch
  • Muzzle device: OPS Inc 12th Model brake/collar, and 12th Model suppressor [Allen Engineering AEM5 and brake/collar]
  • Rear iron sight: A.R.M.S. #40
  • Scope rings: A.R.M.S. #22 Medium rings, #22 Tactical Ring Cap and #22 Tactical Ring Rail (rings should not include "lever-stop" hump as produced later by A.R.M.S.)
  • Optic: Leupold Vari-X III 3.5-10x40mm LR, M3 turrets, illuminated Mil-Dot reticle (use .308 turret) [Leupold LR/T 3.5-10x40 LR, M3 turrets, Illuminated Mil-Dot reticle]
  • Bipod: Versa-Pod with A.R.M.S. #42, or a Harris with A.R.M.S. #32 (Versa-Pod far inferior to Harris)
Late Mod0
  • Upper: Colt or Diemaco marked, flat top, M4 feed-ramps
  • Barrel: Douglas 416r SS, 18" SPR contour, 1/7 twist, flats milled for PRi FSB (Compass Lake, Centurion Arms, High Caliber Sales, and PRi can all supply barrels that meet the appropriate spec minus FSB flats)
  • BCG: Colt M-16.
  • Handguard: Precision Reflex Gen III carbon fiber free-float handguard, rifle length
  • A.R.M.S. #38 SPR-PEQ-2-3 Sleeve
  • FSB: PRi folding FSB, set-screw, .750 (original production had PRi's full address engraved on sight tower; those engraved with "PRi USA" are later manufacture)
  • Charging handle: PRi Gas Buster M-84 with military latch
  • Muzzle device: OPS Inc. 12th Model brake/collar, and 12th Model suppressor [Allen Engineering AEM5 and brake/collar]
  • Rear iron sight: A.R.M.S. #40
  • Scope Rings: A.R.M.S. #22 Medium rings (rings should not include "lever-stop" hump as produced later by A.R.M.S.)
  • Optic: Leupold 3-9x36mm TS-30, Mk4 MR/T 2.5-8x36mm TS-30A2, M2 turrets with Mk262 BDC, illuminated TMR reticle
  • Bipod: Harris with either A.R.M.S. #32 or KAC RAS bipod adapter
SPR/A, SPR/B, Mod1
  • Upper: Colt or Diemaco marked, flat top, M4 feed-ramps
  • Barrel: Douglas 416r SS, 18" SPR contour, 1/7 twist, flats milled for PRi FSB (Compass Lake, Centurion Arms, High Caliber Sales, and PRi can all supply barrels that meet the appropriate spec minus FSB flats)
  • BCG: Colt M-16
  • Handguard: Knight's Armament M4 Match FF RAS, rifle length (now called the SR15/16 Match FF RAS)
  • Gas block: NSWC Crane pattern (Badger Ordnance parkerized/NSN version is correct, has open front of gas tube hole)
  • Charging handle: PRi Gas Buster M-84 with military latch
  • Muzzle device: OPS Inc. 12th Model brake/collar, and 12th Model suppressor [Allen Engineering AEM5 and brake/collar]
  • Scope rings: A.R.M.S. #22 High rings (A.R.M.S. rings should not include "lever-stop" hump as produced later by A.R.M.S.)
  • Optic: Leupold Mk4 MR/T 2.5-8x36mm TS-30A2, M2 turrets with Mk262 BDC, illuminated TMR reticle or NightForce 2.5-10x24 (optionally with NightForce rings)
  • Bipod: Harris with KAC RAS bipod adapter (BRM-S, A.R.M.S. #32 could still optionally be used)

ModH, Mod "Holland"

  • Upper: Colt or Diemaco marked, flat top, M4 feed-ramps
  • Barrel: Noveske 16" Recon, mid-length gas system, profiled for OPS Inc. 12th Model brake/collar (will require aftermarket contouring of most barrels)
  • BCG: Colt M-16
  • Handguard: Precision Reflex Gen III carbon fiber free-float handguard, FDE, rifle length
  • Charging handle: PRi Gas Buster M-84 with military latch
  • Muzzle Device: OPS. Inc. 12th Model brake/collar, and 12th Model suppressor [Allen Engineering AEM5 and brake/collar]
  • Scope Rings: A.R.M.S. #22 Medium rings on PRi recce rail (rings should not include "lever-stop" hump as produced later by A.R.M.S.) or LaRue LT-104 SPR mount
  • Optic: Leupold 3-9x36mm TS-30, Mk4 MR/T 2.5-8x36mm TS-30A2, M2 turrets with Mk262 BDC, illuminated TMR reticle, Leupold Vari-X III 3.5-10x40mm LR, M3 turrets, illuminated Mil-Dot reticle (use .308 turret) [Leupold LR/T 3.5-10x40mm LR, M3 turrets, illuminated Mil-Dot reticle]; S&B Short-Dot
  • Bipod: Harris with either A.R.M.S. #32 or KAC RAS bipod adapter
  • Iron sights: (apparently PRI were supplied but never used)

In the Wild
Naturally, once these rifles were issued to units, operators and even Marines used various non-issued parts. Here is a short summary of what has been seen:

Early SPR/Mod0:
Both Leupold 3.5-10x40mm and 3-9x36mm scopes have been used. Many have had carbine stocks like the old CAR-style, enhanced M4, SOPMOD Gen I, or even the Tactical DuoStock swapped on.

Mod1:
One 3rd SFG-issued rifle pictured with SSgt Robert J. Miller (MoH recipient) used an A.R.M.S #36 S-EX 5.56mm rail, and a Leupold M3X 10x fixed-power scope, possibly pulled from an M-24 or SR-25 rifle. Another has been seen with a Magpul PRS, LaRue mount, and a Premier Reticles 3-15x used by an AMU shooter, and a similar rifle was pictured on a FOB in a very posed-looking photo. Further, a USMC-issued Mod1 was seen using #22 Medium rings instead of High rings, and a LaRue mount has been spotted as well. Grips have varied from the usual A1, A2, and ERGO, and at least one Magpul MIAD has been used. As with the Mod0s, carbine stocks like the SOPMOD and M4 have been used on Mod1s.

ModH:
The Mod "Holland" was already a small-batch configuration, but even as soon as they were issued to 5th SFG units, some Ace SOCOM stocks were replaced with Magpul ACS and CTR stocks. Optics are basically anything existing in the unit's inventory, from S&B ShortDots still in the system, the 3-9x and 3.5-10x Leupold scopes from earlier Mod0s, and there's even a photo of an ELCAN on a Mod1 floating around. No non-magnified optics like EOTechs or regular Aimpoint M2/M4s, but Micros have been seen on offset mounts. Backup iron sights, as a whole, were almost entirely left unmounted. Grips were again the same usual selection.

Parts Alternatives for Clone Building
Many parts are rare, expensive, and/or both. Despite this, there are some alternatives to a 100% pure clone that will still provide the same visual look and performance. While not a museum-grade clone, most would be hard-pressed to discern the difference. Just know there are those of us out there that will haze and peer-pressure you into further moving your build towards a true clone.

Barrel:
Popular options are the White Oak Armament SPR barrel (rifle gas), BCM's SPR barrel, Rainier's Match and Ultramatch offerings (ensure it's the SPR contour with 12th Model profile), Ballistic Advantage's SPR barrel. Compass Lake Engineering can also spin a Mk12 profiled barrel with a Criterion chrome-lined blank, or even a Krieger, which was one of the original contenders for the program. The DPMS Mk12 barrels are NOT properly profiled for a clone.

Optics & Rings:
In the case of the Leupold 3-9x or 3.5-10x, it's generally okay to go for a non-illuminated version of either, sometimes with M1 or other turrets and reticles. As far as the NightForce scope, the 2.5-10x24mm is not generally released to the public anymore (with one recent exception through Sniper's Hide), so many use the 32mm or even 42mm versions with the #22 High rings. As for the rings, any of the recent produced A.R.M.S. #22s with the lever-stop humps are functionally the same, the desire for non-lever-stops is purely aesthetic when going for the most authentic look. As LaRue LT-104s have been seen in use, it is justifiable to use one depending on whether you have a specific rifle you want to copy, or even just if you absolutely cannot acquire #22 High rings.

A.R.M.S. #38 SWAN Sleeve:
The #38 family of sleeves are no longer available. Finding them secondhand usually cost $250-$300 easy, more for rarer early variants. Fortunately, PRi's copies of the sleeves look and function almost identically, with minor visual differences. PRi and other builders supply these currently for complete Mod0 builds.

FSB:
While the set-screw version of PRi's FSB is spec, most use the cross-bolt, clamp-style version. They are extremely robust, and when aligned and torqued, have been shown to hold strong enough that you'll probably shear your barrel extension pin or upper before it budges. This is mainly how Mod0 uppers are supplied by most vendors, including PRi themselves.

Suppressor, Brake/Collar:
Diverging from the OPS Inc. or AEM brake and collar will get you MAJOR flak. Trust me, I've been running an AAC SPR/M4 for years now and it took a LONG time to not get clubbed every time I posted it. The Allen Engineering AEM5 is basically the current production of the OPS Inc. 12th Model, as they were originally made by Ron Allen and his team in the first place. Only minor differences separate original OPS Inc. cans from AE cans, and these are only obvious to trained eyes.

As far as the rest, you can swap Colt parts out for any other .mil-spec parts, like BCM, DD, CMT, etc. Any billet uppers/lowers, funky BCG coatings, extended bolt releases, etc. are extremely frowned upon. Remember, once you start going down the path of building a "better" rifle rather than what was spec, you're quickly beyond clone territory and would have been better off building a custom 16" or 20" rifle. Cloning is generally viewed as all-in or not at all.

* * * * * * * * * *

Complete Mk12 Mod0 / Mod1 Uppers
Bravo Company Manufacturing
High Caliber Sales
Precision Reflex Inc.

Specific Mk12 Tech
Augee's side-by-side comparison of the original ARMS SWAN Sleeve and PRI reproduction PEQ Sleeves: bottom of p136
KOBK's side-by-side comparison of PRI Gen I, II, and III handguards, and Gen I and Gen II FSBs, and SWANs: middle of p137
Augee's Mod1 gas block tech: top half of p357
Glass1's Early Mod0 photo breakdown: middle of p449
tamboi's Leupold Vari-X, TS30, and TS30A2 scope history/lineage, and part numbers, p.792

Attachment Attached File
Link Posted: 1/16/2021 3:42:33 PM EDT
[#1]
Anyone know if it's possible to convert Mk4 3.5-10x40 TMR Illum M1 turrets to M3?  Also curious if anyone knows when Leupold custom shop will be accepting new requests.  I've done a bunch of searching but unable to find anything definitive.  Everything I was able to find was regarding conversion of M1 to M5, which I'm hoping to  do M3 if all possible.  

Thanks in advance!

Link Posted: 1/16/2021 3:45:32 PM EDT
[#2]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By teamjawbox:
Anyone know if it's possible to convert Mk4 3.5-10x40 TMR Illum M1 turrets to M3?  Also curious if anyone knows when Leupold custom shop will be accepting new requests.  I've done a bunch of searching but unable to find anything definitive.  Everything I was able to find was regarding conversion of M1 to M5, which I'm hoping to  do M3 if all possible.  

Thanks in advance!

View Quote


Yes, but it supposedly depends on year. If it's a Mark 4 and not a Vari-X III the year thing becomes a moot point I believe.
Just be careful if you send it in and it has an early illumination housing on it. They like to upgrade it to the current slab side type for free, killing a lot of the clone value.
Link Posted: 1/16/2021 4:18:25 PM EDT
[#3]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Hunterex:


Yes, but it supposedly depends on year. If it's a Mark 4 and not a Vari-X III the year thing becomes a moot point I believe.
Just be careful if you send it in and it has an early illumination housing on it. They like to upgrade it to the current slab side type for free, killing a lot of the clone value.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Hunterex:
Originally Posted By teamjawbox:
Anyone know if it's possible to convert Mk4 3.5-10x40 TMR Illum M1 turrets to M3?  Also curious if anyone knows when Leupold custom shop will be accepting new requests.  I've done a bunch of searching but unable to find anything definitive.  Everything I was able to find was regarding conversion of M1 to M5, which I'm hoping to  do M3 if all possible.  

Thanks in advance!



Yes, but it supposedly depends on year. If it's a Mark 4 and not a Vari-X III the year thing becomes a moot point I believe.
Just be careful if you send it in and it has an early illumination housing on it. They like to upgrade it to the current slab side type for free, killing a lot of the clone value.


Thank you!
Link Posted: 1/16/2021 5:37:44 PM EDT
[#4]
If anyone has a lead on a TAS-1 with the buttstock adapter please let me know.  Just saw one sell on FB for $163, LOL.  My quest for that buttstock adapter is driving me mad but I'm afraid I won't be satisfied until I have one.
Link Posted: 1/16/2021 5:54:05 PM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By teamjawbox:
If anyone has a lead on a TAS-1 with the buttstock adapter please let me know.  Just saw one sell on FB for $163, LOL.  My quest for that buttstock adapter is driving me mad but I'm afraid I won't be satisfied until I have one.
View Quote


I've got an extra one I'll sell you.  PM or e-mail me and we can talk it over.
Link Posted: 1/16/2021 6:05:30 PM EDT
[#6]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Hunterex:


I've got an extra one I'll sell you.  PM or e-mail me and we can talk it over.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Hunterex:
Originally Posted By teamjawbox:
If anyone has a lead on a TAS-1 with the buttstock adapter please let me know.  Just saw one sell on FB for $163, LOL.  My quest for that buttstock adapter is driving me mad but I'm afraid I won't be satisfied until I have one.


I've got an extra one I'll sell you.  PM or e-mail me and we can talk it over.


Thanks!  PM sent.  Much appreciated.
Link Posted: 1/16/2021 9:03:54 PM EDT
[#7]
Have x24s been seen/used in theater on the H? Got some swapping around to be done here in the upcoming days, and was planning to use my capped turret x24 on the H
Link Posted: 1/16/2021 11:36:00 PM EDT
[#8]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By teamjawbox:
If anyone has a lead on a TAS-1 with the buttstock adapter please let me know.  Just saw one sell on FB for $163, LOL.  My quest for that buttstock adapter is driving me mad but I'm afraid I won't be satisfied until I have one.
View Quote


I need one of these as well if anyone else has a spare lying around they’d like to sell.
Link Posted: 1/17/2021 11:23:13 AM EDT
[#9]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Paulie771:


I need one of these as well if anyone else has a spare lying around they’d like to sell.
View Quote


I am as well. I ordered a BFG a2 adapter for now but would like to track down the original.
Link Posted: 1/17/2021 12:09:24 PM EDT
[Last Edit: Maddy21] [#10]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By ResponsibleSecond:


I am as well. I ordered a BFG a2 adapter for now but would like to track down the original.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By ResponsibleSecond:
Originally Posted By Paulie771:


I need one of these as well if anyone else has a spare lying around they’d like to sell.


I am as well. I ordered a BFG a2 adapter for now but would like to track down the original.


I guess I’ll get in on this train of need as well.
Link Posted: 1/17/2021 1:03:06 PM EDT
[#11]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Maddy21:


I guess I’ll get in on this train of need as well.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Maddy21:
Originally Posted By ResponsibleSecond:
Originally Posted By Paulie771:


I need one of these as well if anyone else has a spare lying around they’d like to sell.


I am as well. I ordered a BFG a2 adapter for now but would like to track down the original.


I guess I’ll get in on this train of need as well.


choo choo!
Link Posted: 1/17/2021 2:00:58 PM EDT
[#12]
What have I done?
Link Posted: 1/17/2021 3:26:15 PM EDT
[Last Edit: Gremyashchy1911] [#13]
Hunterex  you started the begging bus up and laid a brick on the pedal...  
Link Posted: 1/17/2021 6:34:57 PM EDT
[#14]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By teamjawbox:


choo choo!
View Quote
Count me in!
Link Posted: 1/17/2021 9:45:47 PM EDT
[#15]
I emailed Leupold about a week ago asking about the custom shop and they had no estimated date as to when they'd be taking orders again. I have a Vari-XIII I wanna send in to switch to a more correct reticle and I'm stuck waiting for them to open back up
Link Posted: 1/17/2021 9:52:47 PM EDT
[#16]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By g56:
I emailed Leupold about a week ago asking about the custom shop and they had no estimated date as to when they'd be taking orders again. I have a Vari-XIII I wanna send in to switch to a more correct reticle and I'm stuck waiting for them to open back up
View Quote

Might be waiting awhile, I feel like its been out for over a year now
Link Posted: 1/17/2021 10:19:06 PM EDT
[#17]
It was a good day.
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Link Posted: 1/18/2021 12:46:49 AM EDT
[#18]
Link Posted: 1/18/2021 6:11:02 PM EDT
[#19]
No 77gr pills to shoot so shot some "cheap" 55gr yesterday. Actually grouped pretty decent at 100yds. However, once I started shooting >400 you could really see the light projectile loose it’s juice and start knuckle balling all over the place.
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Link Posted: 1/19/2021 12:07:49 AM EDT
[#20]
Finally got my mod 0 work in progress out to the range today.  Once I got the scope dialed in it was dead on.

Link Posted: 1/19/2021 11:19:58 AM EDT
[#21]
A quick question regarding the Arms swan engraving. How does one tell the older stuff from the newer stuff? I believe it has something to do with the wing or lack of wing on the engraving?
Link Posted: 1/19/2021 11:38:37 AM EDT
[Last Edit: KGLaw] [#22]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By boynty77:
A quick question regarding the Arms swan engraving. How does one tell the older stuff from the newer stuff? I believe it has something to do with the wing or lack of wing on the engraving?
View Quote


That's right. Wingless Swan is older.

ETA - Some additional information on that is required. Wings were phased in at different times. The #22 caps for instance got them well before engravings changed.
Link Posted: 1/19/2021 12:00:15 PM EDT
[#23]
The rear sight.
Link Posted: 1/19/2021 12:01:28 PM EDT
[#24]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By boynty77:
The rear sight.
View Quote


You'll want Wingless, and the horizon notch sight.
Link Posted: 1/19/2021 12:06:43 PM EDT
[#25]
What do you mean by horizon notch sight?
Link Posted: 1/19/2021 12:27:30 PM EDT
[#26]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By boynty77:
What do you mean by horizon notch sight?
View Quote


Attachment Attached File


The one on right versus left.
Link Posted: 1/19/2021 12:40:06 PM EDT
[#27]
^^^
I have a wingless swan but normal aperture. Is it an in-between model?
Link Posted: 1/19/2021 1:00:12 PM EDT
[#28]
Just got notification that Brownells has the KAC ras rails in stock.

KNIGHTS ARMAMENT - AR-15/M16 FREE FLOAT RAS

Use code MZA for and extra $20 off.
Link Posted: 1/20/2021 1:00:22 AM EDT
[#29]
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Originally Posted By boynty77:
Just got notification that Brownells has the KAC ras rails in stock.

KNIGHTS ARMAMENT - AR-15/M16 FREE FLOAT RAS

Use code MZA for and extra $20 off.
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It's funny when you read the description of that rail cause it specifically says made for carbine or mid length gas systems with a low profile gas block.  MK12 saw that and said, "Hold my beer.".
Link Posted: 1/20/2021 11:14:45 AM EDT
[#30]
Anyone seen a mod 0 upper or complete rifle in stock anywhere recently?
Link Posted: 1/20/2021 11:50:02 AM EDT
[#31]
Gen 3 swapped in
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Link Posted: 1/20/2021 11:51:14 AM EDT
[#32]
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Link Posted: 1/20/2021 12:11:13 PM EDT
[#33]
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Looks so good.
Link Posted: 1/20/2021 12:25:08 PM EDT
[#34]
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Originally Posted By KrazyL:
Anyone seen a mod 0 upper or complete rifle in stock anywhere recently?
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There's one listed on Snipershide.
Link Posted: 1/20/2021 12:50:55 PM EDT
[#35]
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Looks great man!
Link Posted: 1/20/2021 3:01:40 PM EDT
[#36]
I'm so tantalizingly close to finishing the Mod 1 build. All I've really got left is a deployment case. Anyone got one they're willing to part with?
Link Posted: 1/20/2021 5:53:33 PM EDT
[#37]
I tried searching through this thread and Google but no luck. Does anyone know what the correct serial number ranges are for the Colt and GM lowers? Pics of issued lowers would be great
Link Posted: 1/20/2021 6:46:18 PM EDT
[Last Edit: CMCctx] [#38]
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Originally Posted By Hunterex:


https://www.ar15.com/media/mediaFiles/59096/_40s_jpg-1786442.JPG

The one on right versus left.
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Is there a picture showing wingless versus winged? I keep reading about that and have zero idea what that means
Link Posted: 1/20/2021 7:07:22 PM EDT
[Last Edit: Engineer5] [#39]
ARMS products have a small engraved outline of a swan on them.  The later version of the swan has a pronounced wing where as the earlier ones don't have a wing.

I can't find my pic.
Link Posted: 1/20/2021 7:25:53 PM EDT
[#40]
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Originally Posted By CMCctx:

Is there a picture showing wingless versus winged? I keep reading about that and have zero idea what that means
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Attachment Attached File

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Link Posted: 1/20/2021 7:33:12 PM EDT
[#41]
Thanks, dudes! I'm sitting here looking for a structural difference, and it's just a logo difference.
Link Posted: 1/20/2021 7:35:56 PM EDT
[#42]
The switch to winged 40s comes with the tethered nut. But yeah, just a logo change for the most part.
Link Posted: 1/20/2021 8:50:09 PM EDT
[#43]
Sup MK12 sluts!? Good to see this thread is still going strong!
Link Posted: 1/20/2021 8:55:24 PM EDT
[#44]
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Originally Posted By Zakk101abn:
Sup MK12 sluts!? Good to see this thread is still going strong!
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Well, hello there you long lost friend.
Link Posted: 1/20/2021 9:09:30 PM EDT
[#45]
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Originally Posted By Zakk101abn:
Sup MK12 sluts!? Good to see this thread is still going strong!
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Slut is a derogatory term... I prefer whore
Link Posted: 1/20/2021 9:23:33 PM EDT
[#46]
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Originally Posted By Hunterex:


Well, hello there you long lost friend.
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Not lost. Just wondering my friend. Glad to see you still in here!

@kmcale shut your whore mouth
Link Posted: 1/20/2021 9:58:35 PM EDT
[#47]
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Originally Posted By ringer706:
I'm so tantalizingly close to finishing the Mod 1 build. All I've really got left is a deployment case. Anyone got one they're willing to part with?
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I'm on the hunt for foam for my mod 0.  Have a pelican 1700, just need the proper foam.
Link Posted: 1/20/2021 10:00:53 PM EDT
[#48]
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Originally Posted By kmcale:

Slut is a derogatory term... I prefer whore
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Originally Posted By kmcale:
Originally Posted By Zakk101abn:
Sup MK12 sluts!? Good to see this thread is still going strong!

Slut is a derogatory term... I prefer whore

"Whore" implies you're getting paid to do this. How do I get this job?
Link Posted: 1/20/2021 10:01:47 PM EDT
[#49]
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Originally Posted By teamjawbox:


I'm on the hunt for foam for my mod 0.  Have a pelican 1700, just need the proper foam.
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A little while back, I think I recall someone looking into/talking about custom cutting his foam on the CRA pages. I have since stopped checking in on there, so idk if it was ever done up.
Link Posted: 1/20/2021 10:02:24 PM EDT
[#50]
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Originally Posted By SecretSquirell:

"Whore" implies you're getting paid to do this. How do I get this job?
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unfortunately, i end up paying others in this line of work.. im a backwards whore
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