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Firearms Mega arms, proof CF, 6:5 creedmoor

Mega arms upper and lower, proof 20” carbon fiber 6.5 creedmore. Magpul PRs stock, superlative gas block. Lantac bc and JP bolt, Geissele trigger
$2100 or trade for a 22 arc have $2000

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What determines brass ejection angle/position

On my AR 15 the brass ejects at about 4:30PM from the ejection port, very consistent. It's where it always has thrown spent brass. No issues.
On my AR10 308 it's throwing them out at about 1PM from the ejection port. I have an SLR adjustable gas block set to function consistently. Is there anything I can look at to get the AR10 to eject like the AR15 (4:30PM). Or does it really make any difference?
AERO Precision upper and lower, AERO mlok handguard, Craddock Precision barrel 18" (Bartlein 1:11.25) with headspaced JP bolt, Triggertech Diamond trigger.
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Advice/knowledge on actions.

I like the older Remington stainless actions and have found some for sale at a good price. Honestly I prefer the ones I have to the ARC CdG I just sold. Nothing wrong with the CdG but the stainless Remy just appeals to me, seems a bit smoother. YMMV.

I'm looking to build a 7 PRC or maybe a 300 PRC. The actions are either Long Action/Magnum or 30-06. The LA is back ordered but the 3006 is in stock. would either, or both work?
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SOLD WTS RimX

Zermatt Arms RimX build.

-Harrell's Tuner.
-22" 1:16T Shilen Ratchet barrel spun up by Elemental Industries. (Barrel does have a slight taper towards the muzzle).
-Foundation Stock with forend weights perfectly balanced in current set up.
-Foundation Arca Rail System.
-Single stage Trigger Tech Diamond curve.
-Wiebad cheek cover.
-Tract Toric ELR 4.5-30x56(MRAD).
-Vortex Pro Rings.
-3 RimX Mags(two with extensions from factory and Hoz&Shield).

Parts-
I have a new bolt face and firing pin assembly installed on the rifle. I have the old parts which are pictured below as well as extra parts such as springs and extractors.

Sale-$4,000(W/Scope) $2,800(Rifle Only W/ mags and parts)

Rifle shoots great especially when tuned for that specific lot. Groups below are with Sk Rifle Match @ 50yds. Previous owner stated that Lapua Center X is what this rifle really loves.

Rifle has been used in monthly matches as well as NRLX matches. Barrel does show some scuff marks as well as the foundation stock,

I'm in N. GA and will do Face to Face meets. Also will ship FFL-FFL but trader pays for shipping their own rifle and I will pay for mine. Paypal G&S(buyer pays fees) or Venmo

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SOLD Noveske + BCM 300Blk Precision Upper CHEAP

Built this to launch subs at a stupid distance with N110 (mission accomplished). It only has 100 rounds through it and I don't have time to continue the project with the new baby.

Had no issues shooting sub MOA groups at 50yds and 100yds.

Noveske 300Blk 12.5" Crusader Barrel 1:7T
BCM thermo fit upper
BCM QRF 10" rail
Midwest BCG
BCM Ambi gunfighter charging handle
Arisaka hand stop

Scope, Kiji, and muzzle brake not included.

SOLD

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Prototype Stiller Mk13 receivers

Here's something that's never been discussed on the forums, and I thought that it's a topic that warrants it's own thread (as opposed to being posted in the big Mk13 thread). Recently, a small group of 8 or 9 original prototype/sample Stiller Mk13 receivers popped up in the collector market and were sold. I have 2 of them in my possession, but only one of them is mine (serial number 3), the other receiver belongs to my brother (serial number 12). Collectors were limited to purchasing just 1 receiver, not multiples, in order to keep things fair.

When Crane put out a solicitation for the Mk13 receivers, Stiller made 25 of them according to Crane's specifications. The 8 or 9 receivers that recently hit the collectors market were from this original batch of 25 receivers. These Stiller Mk13 receivers are considered to be prototypes and/or sample pieces for Crane, and were never issued.

Stiller based these prototype Mk13 receivers off their Tac 300 receivers, but the 2 types of receivers have some differences. The biggest difference between a Mk13 receiver and Tac 300 receiver is the lack of the flat left side on the Mk13 receiver. This is because Crane specifically requested round receivers for their Mk13 program. Stiller assumed that the entire receiver should be round, even though Crane was only referring to the bottom of the receiver (such as a round bottom Remington 700 receiver compared to a flat bottom Winchester Model 70 receiver), so Stiller didn't cut the flat into the left side of the receiver like the Tac 300 has.

The armorers from Crane inspected these 25 prototype Stiller Mk13 receivers and liked what they saw, but they did request a few changes to the receivers. Here's a list of changes that Crane requested Stiller to make:

● Remove the "C" serial number suffix (the "C" suffix stood for "Crane")
● Remove the space between the "MKA" serial number prefix and the rest of the serial number
● Add one more digit to the number portion of the serial number (4 digits to 5 digits)
● Move the engraved serial number from the left side of the receiver to the right side of the receiver
● Remove the gas vent hole from the receiver
● Add an RFID tag to the left side of the receiver that has a 2D barcode, Stiller manufacturer cage code, Mk13 receiver part number, and Mk13 receiver serial number

There's also another for differences between the 25 Mk13 prototype receivers and the issued Mk13 receivers, but I highly doubt that these were changes that were requested by Crane. I think that these are just things that Stiller did on their own, for whatever reason. These are just some things I've noticed when comparing the prototype Stiler Mk13 receivers to the issued Stiller Mk13 receivers:

● The prototype receivers don't have commas in the FFL markings, the issued receivers do have the commas in the FFL markings
● The prototype receivers have a slightly thicker outline to the "MK13 300WM" markings than the issued receivers (bold text vs regular text)
● The prototype receivers have a slightly different letter font and size to the "MK13 300WM" markings than the issued receivers (this can really be seen when comparing the "W" and "M" letters on the receivers)
● The prototype receivers have a slightly different letter font and size to the "SPF LLC WYLIE TX" markings than the issued receivers (this can really be seen when comparing the "W" letters on the receivers)
● The prototype receivers have a shiny finish bolt shroud and bolt knob, the issued receivers have a matte finish bolt shroud and bolt knob

The 25 prototype Stiller Mk13 receivers were never built by Crane or issued to any military unit. The owner of Stiller might have kept some of these 25 prototype Mk13 receivers for his personal collection or for the company's records, and he might have sold and/or given away some of these prototype Mk13 receivers to employees and friends. I have no idea who had these 8 or 9 prototype Stiller Mk13 receivers that were just sold to collectors, or if there's any other prototype Mk13 receivers out there. I assume that none of the 25 original prototype Stiller Mk13 receivers were destroyed, so they have to be somewhere. However, myself and other big Mk13 collectors had absolutely no idea that these prototype receivers even existed before these receivers popped up for sale. I assume that these receivers are also unknown to just about everyone on this forum, so this thread should have some interesting information for the collector community.

Well, that's enough typing, here's a bunch of photos of the prototype Stiller Mk13 receivers for you all to enjoy. I also took a few photos of my other 2 Stiller Wylie Mk13 receivers (build into Mk13 Mod 5 and Mod 7 rifles) so that the differences between the prototype receivers and the issued receivers can easily be seen:

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SOLD Vortex razor Gen II 4.5-27 MRAD EBR7C

WTS Vortex Razor Gen II 4.5-27 MRAD Scope. Illuminated EBR-7C MRAD Reticle. Has a few scratches here and there but glass is clean. Comes with sunshade, box, and athlon rings.

Reduced- $1,475
$1500 shipped insured. Thanks

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Best Hub Adapter/Brake setup for Suppressor

I am looking to purchase a couple more suppressors and I am considering the purchase of the 1.375” hub mount versions. If given the option, which hub/muzzle brake interface do you recommend. I will be using them on a large frame AR, small frame AR and potentially a bolt action.

I see the silencerco, griffin and deadair systems but I am not sure what else is out there.

Any recommendations?

SOLD Swaro z6i 1-6, Delta 3.5-21 and burris xtr3 3.3-18 scr2 mil

Hello all!
Moving some scopes around...
-Swarovski z6i with the BTR reticle and reptilia mount, no box
1300 shipped CONUS
-Delta Stryker hd 3.5-21x44 with the DPRC-1 MRAD reticle, with box- 1300 shipped CONUS
-Burris xtr3 3.8-18 with the SCR 2- MIL reticle, with box -850 shipped CONUS
All in good to great shape, everything works.
Check/M.O., PP F&F or G&S, you pay the fee.
DM me any questions, happy
to chat, send more pics, whatever!

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hi from Colorado Springs

Hello from the Colorado Springs area! I've been a longtime lurker here and finally got an account setup, with my brother getting my into long range! I finally pulled the reloading gear back out after it sat boxed up for way too many years.

Current setups for longer range shooting:
Bergara HMR Carbon Wilderness in 6.5cm
Steiner T6Xi 5-30x56
APF 30cal Ti Suppressor
bipod - looking (was using one of my brothers ckye-pods)

6x45 AR - self built
18" barrel w/SA adjustable gas block
Vortex Venom 3-15x44

Remington Model 7 in 300 SAUM
Nikon scope
sub 7lbs - elk gun

I got my 6.5 setup this past weekend and with a good spotter/tools we had it shooting 1200 yards in the first dozen shots - always fun to get some distance! Looking forward to the rattlesnake butte shoot in April 2025!