Recent content by MSTN

V Seven has wisely been using these for several years on their .300 Blackout barrels. Here's an example, showing a V Seven .300 BLK barrel on the left and a "normal" Craddock Precision .223 Wylde Bartlein on the right: I was surprised to receive in recent days both a Proof CF 6 ARC barrel and...

I was set up with dealer terms for almost two decades with Young Mfg. When the new ownership took over, they would neither answer my emails or phone calls. After multiple attempts to contact them, I gave up and rolled over to JP as my #1 go-to choice. By that time, JP was DLC coating their...

In March of 2022 I chronographed three 12.5" 6.5 Grendel, 6.8 SPC, and 6mmARC uppers with factory loads. 6.5 Grendel - Hornady 123 SST - 2280 FPS 6.8 SPC - Remington 115 MatchKing - 2502 FPS (!!!) 6mmARC - Hornady 108 ELD-M - 2509 FPS These were all new barrels that will speed up a tad with...

Just the JP bolt is DLC coated. The JP bolt carrier has a black oxide finish, not nearly as tough as the DLC coating. JP does polish the rails on the bolt carrier nicely. Les Baer bought a bolt carrier patent from Dan Young of Young Mfg. about 20 years ago. I believe Young Mfg. made all of the...

What has no one mentioned extreme profanity?!?

I used to use the Young Mfg. N/M bolt carriers for precision applications. I'd get the bolt carrier, LMT bolt, and the gas key Ionbond DLC coated: Currently, JP makes the bolts in the sizes I need already Ionbond DLC coated. Easy button:

Gas port erosion is a part of life if you shoot a gas gun. They all do it - some in different fashions - and at different rates. And all 416-R barrel blanks are apparently not equal. Have you ever had a new, fancy SS barrel that shoots absolutely lights out initially - And then shoots like...

18" Proof SS 22 ARC barrel and Hornady 88 ELD-M. Sample size 15 RD. Brand new barrel - Will most definitely speed up. SD should come down.

No, I'm sorry, but I can't. I have a 70% hearing loss. I hear nothing from any type recoil system.

I'm betting Geissele went with longer "NATO" type throats for reliability. With Proof CF barrels and an older lot of Hornady 108 ELD-M: 14.5" 2560 FPS 18" 2660 FPS Current batch is a lot slower in 18". Haven't tried it in the 14.5". The older lot was also noticeably temperature...

I'm not smart enough to answer this, but I know the guy who designed the Vltor A5 recoil system, or the newer, upgraded BCM MK 2 recoil system. The big advantage of the is the plain old rifle length recoil spring. It lasts infinitely longer than a carbine length recoil spring and just plain...

The current Geissele rails are superior in every respect.

Which URX rail? There have been four versions. The URX 3 was always my favorite. I built up quite a few ten or so years ago. It was unique and far ahead of its time.

A good friend built a high end bolt gun with Proof barrel that would not group better than 1.5 MOA. Disappointed, he contacted Proof Research - and was told to try a different lot of ammo. That solved the problem. I've been through multiple lots of Hornady factory ammo. I've personally not had...

I bet you spoke with Shawn. PRI personnel have refurbished over the last 20 years a number of the Army's MK 12's at Ft. Campbell. So, in a sense, a good number of dead terrorists have had experience with them...