Mark’s 6mm Creedmoor

I love my 6mm Creedmoor.  We built this when my wife decided she might have interest in shooting some PRS matches and it would be slightly less recoil than my 6.5 Creedmoor match rifle.  I also wanted to play around with the cartridge for myself and test out the new brass our friends at Alpha Munitions just released.  So, in January of 2018 we built this rifle.  This article goes through all the various components that went into the build along with some of the rifle’s accessories.

Receiver and Barrel

I’ve been running my 6.5 Creedmoor for about six years now.  Back when we built it I chose a Stiller’s receiver for the action, which was one of the actions we were building a lot of rifles on at the time.  It was for sure the best value in a quality receiver back then.  The quality is still great and so is the value so I decided to build this new rifle on another one of our AO-branded Stiller’s.  

It is an “R700 clone” meaning it has a Remington 700 footprint but has a lot of extra features such as a one-piece bolt assembly, an M16-style extractor, tighter bolt fit to the raceways, faster lock time, 20-MOA base secured with dual anti-sheer pins and four 8-40 screws, pinned recoil lug, fluted bolt body, side bolt release and tolerances that don’t require anything out of the box other than lug lapping.  

I went with a Rock Creek “Sendero” contour barrel in a 1:8 twist.  Rock Creek is the first barrel manufacturer we stocked when we opened the shop and they remain one of our favorites to this day.  Incredible barrels.  We finished this one at 24″ and threaded the muzzle 5/8×24 for a brake. 

The only modification to the Stiller receiver we made was adding our grooved bolt knob.  It is CNC machined from 7075 aluminum for the ultimate in durability.  Thread pitch is 5/16×24.  Laser engraved on the bottom with our logo.  You can find this and the other knobs we sell here.  This has quickly become my favorite bolt knob and I can run the bolt faster and smoother with this than any other knob.

Some guys like stocks while others prefer a chassis.  I actually like both and my wife doesn’t really have a preference.  I opted to go with the Masterpiece Arms Comp B chassis for several reasons.  First off, the “on the fly” adjustable cheek riser and LOP (length of pull) allows me to quickly adjust the stock to fit for either me or my wife.

The next thing I like about the chassis is the grip.  While the chassis is compatible with most AR-15 grips, the MPA vertical grip is hands down my favorite.  It is very comfortable on the wrist compared to a swept grip that cocks the wrist slightly.  The swell on the side forces the trigger finger into a more consistent position on the trigger.  Lastly, the thumb groove allows for comfortable and consistent placement of the thumb.  I find that by riding my thumb down the side of the grip instead of around it my hand is much more consistent resting on the grip and I am faster running the bolt and getting back on the grip. 

Not shown in the pics but still important are the flush cup adapters machined into the side of the chassis.  They allow quick installation or removal of a sling.  Us PRS guys don’t use slings as much as we probably should, but when you do need one this chassis is setup for it. 

Final note on the chassis is the ARCA rail cut into the forend.  PRS shooters know how great an advantage it is to quickly relocate their bipod or clip into (or out of) a tripod all under pretty tight times.  You can also see here the holes machined into the chassis for the various barricade stops and other innovative attachments  that can be quickly snapped onto the bottom of the chassis and just as quickly removed.  I personally do not use this feature because I am old school and prefer bags.  But, it is a nice feature for folks who do want those barricade stops.  The ARCA on the other hand is something that has proven a huge benefit for me.  I do run the MPA spigot mount with Picatinny interface for the few occasions I use my Atlas 5-H bipod, which doesn’t have an Arca mount currently.

Oh, there are other cool features like the built-in bubble level, NV bridge, different bag riders, etc. but I hit on the most important features for me.  My friend Phil (owner of MPA) really put a lot of thought into this chassis sytsem.  You can tell it was designed and built by a real shooter!

I have run a lot of different triggers and in fact am constantly testing other products.  However, I have not yet found a trigger I like better than the Timney Calvin Elite.  We sell these and other triggers in our on-line shop.  I run all my Calvin Elite triggers at 1.5 to 1.75 pounds and they are always crisp and consistent.  On this rifle I have it set to 1.5#.

If you bothered to read my article on why I run a suppressor you won’t be surprised to see I am running a Rugged Suppressors Micro30 in the short configuration.  In this short configuration it only weighs 11.8 ounces and is 5″ long, which only adds maybe 4″ to overall length on rifle.  It uses a muzzle brake adapter to quickly mount to the rifle and the dual taper mount locks the suppressor solidly on the rifle.  In PRS I am just wanting something quiet enough to kill the concussion of the muzzle blast so this short config is perfect.  When I am just out playing around or when I run the suppressor on something like an AR-15, I screw on the “ADAPT” module which adds internal volume and additional sound baffle making the suppressor even more quiet.

I have yet to find a suppressor I like better.  Period.  No, we don’t sell these.  I got no dog in the fight.  But I truly don’t think a better QD suppressor exists.  

I run Nightforce Optics scopes on all my rifles.  There are a lot of really good scopes on the market these days.  However, I have yet to find any other brand with the features and quality for the value I get with Nightforce.  The scope on this rifle is an ATACR 7-35 power with MOAR reticle.  Yes, I am one of the minority in the PRS world running a MOA-based scope.  It is just a math system, folks.  Get over it.  And yes, I can do the conversion between Mils and MOA pretty easily.  I have run Mil scopes in the past and very often shoot Mil scopes at the range.  However, I simply prefer the finer adjustment of the MOA system.

The scope has very positive, tactile adjustments for windage and elevation.  I rarely dial for wind so I really like the capped windage turret.  If you like dialing wind, you can replace the cap with the provided “beauty ring” thread protector for an exposed turret.  The ZeroStop feature is super easy to set and allows me to quickly and positively bottom back out at my zero.  No getting confused on rotations!

The scope has digital illumination for the reticle.  I’ve even popped the illumination on a few times in PRS events for targets that were recessed in shadowy hillsides.  

The magnification is easy to adjust using the provided lever.  I prefer and use Nightforce rings.  And NO, you do NOT need to lap them!  People who lap quality rings like these Nightforce are doing so unnecessarily.  If the rings are not perfectly aligned, there is a problem somewhere else (like a bad base or a warped receiver) and lapping the rings is “fixing” the wrong problem.

I like using bubble levels that are mounted to the optic forward of the elevation turret and off to the left side so my left eye can glance at the level without breaking my cheek from the rifle.  This is an older Vortex level I’ve had forever and it works great.  However, we stock and sell the Holland levels that are similar but slightly smaller in form factor.


I have several bipods  I regularly use.  Shown here is one of my Harris BRM-S models modified with Kahntrol “Pod-Mod” adapters that allow me to use Atlas feet like the Hawk Hill Talons shown here.  I am also running an early version of the Henderson Precision ARCA adapter.

I have and use several different data cards.  Shown here is my Patriot ID card which is very economic.  Comes with the easy to use wet erase marker too.

I run the MPA Mag extenders on some of my magazines to give me up to 4 extra rounds.  And for extra safe measure I run the SAP Match Saver two round holder just in front of the ejection port.  Indeed, I have used a round or two from that in matches!

Well, that’s it.  A long article for sure but we get a lot of questions about our rifle setups so figured we’d share some of that information with you.  If you have any questions or comments, please feel free to contact us or post.  Take care, Mark