Roscoe barrel feedback

[midnitesi]

`Long story short. I am looking into picking up a 16 inch arc barrel from roscoe with a rifle gas system. It seems pretty new so i am curious if anyone here has used it and any feedback or advice for it. 


The build will be a replacement for my current patrol rifle, and plan to use the A5 buffer system from BCM, maybe a Kynshot buffer (havent seen if they make an A5 yet). Geissele MK16 rail, and tricon trigger, probably a BCM upper, and a new frontier lower (i know, cheap, but it is one i designed). 

I am sure i will need an adjustable gas block, or light weight BCG. but that is the whole point of me coming here, to get feedback. 

thanks in advance.

[grayfox]

I was not aware that the Roscoe 16" has a rifle length gas system. That's, IMO, too long of a gas system for 16". The 16" ARC's I'm familiar with are mid length (I have 1). 18" rifle length, ok.
Roscoe is a budget barrel, but I would suggest you spend a bit more for a better quality barrel, and economize on other parts. Barrel, trigger and optics - put the $$ into these pieces, they are the key to a good-shooting system. Having built several grendel and 6 Arc systems, this is the advice I give others who are going to follow the build path... which is a good path, but you should put some $$ into these pieces. Otherwise you'll spend all that "saved" money in bullets, powder, range trips- gas and time, so it's no savings to scrimp there.

[rickt300]

My 6 ARC is midlength gas and I had to get an adjustable gas block to deal with over gassing. Rifle length might just be perfect. Works great with my 16" 22 ARC which is rifle length gas.

[VictoriousLV]

I purchased this exact barrel over Black Friday weekend and ordered a KAK bolt head to go with it. I was piercing primers on Hornady factory ammo and wrote to both KAK and Rosco. Rosco responded that they use the type I 7.62x39 style bolt heads. So I ordered a replacement bolt head and am waiting for its arrival to begin shooting and load development. So if you do plan on purchasing one make sure NOT to get the type II like I did. 

[grayfox]

NOT having interchangeability within the grendel family is another reason I would avoid that mfr -- although I did not know this fact until now. Using the 0.125" bolt face depth ("7.62x39") can also lead into needing a different firing pin length than standard... ala Toolcraft bolts back in the day. I avoid places that interject confusion into the build... that said if you have it set up right it will work, but you have to keep those parts separate from others like grendel, and even possibly any other 6 Arc you have on hand.

[midnitesi]

I was not aware that the Roscoe 16" has a rifle length gas system.  That's, IMO, too long of a gas system for 16".  The 16" ARC's I'm familiar with are mid length (I have 1).  18" rifle length, ok.
Roscoe is a budget barrel, but I would suggest you spend a bit more for a better quality barrel, and economize on other parts.  Barrel, trigger and optics - put the $$ into these pieces, they are the key to a good-shooting system.  Having built several grendel and 6 Arc systems, this is the  advice I give others who are going to follow the build path... which is a good path, but you should put some $$ into these pieces.  Otherwise you'll spend all that "saved" money in bullets, powder, range trips- gas and time, so it's no savings to scrimp there.

I completely understand, however the purpose of the rifle does not require a 400 dollar barrel for SDMR use. it is replacing my patrol rifle in 556. I already have a MK12 clone in 6 arc so that is my SDMR/SPR rifle. this is something that will spend more time in a rifle rack than not.

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I purchased this exact barrel over Black Friday weekend and ordered a KAK bolt head to go with it. I was piercing primers on Hornady factory ammo and wrote to both KAK and Rosco. Rosco responded that they use the type I 7.62x39 style bolt heads. So I ordered a replacement bolt head and am waiting for its arrival to begin shooting and load development. So if you do plan on purchasing one make sure NOT to get the type II like I did. 

HUGE THANKS, 
I was not aware they used the type1. I will for sure have to get one. please keep me posted on the barrel, it is at the top of my list for options.

[midnitesi]

I purchased this exact barrel over Black Friday weekend and ordered a KAK bolt head to go with it. I was piercing primers on Hornady factory ammo and wrote to both KAK and Rosco. Rosco responded that they use the type I 7.62x39 style bolt heads. So I ordered a replacement bolt head and am waiting for its arrival to begin shooting and load development. So if you do plan on purchasing one make sure NOT to get the type II like I did. 

any updates?

[VictoriousLV]

Update- I ordered both a precision firearms type I and a KAK type I bolt head (both marked 7.62x39). The PF did not function in this barrel. The KAK worked immediately. I had to drop down to a carbine weight buffer (3.0oz) and had ejection in the 2-3 o’clock area.i also installed a superlative arms adjustable gas block but did not end up using the gated down function of the gas block as I believe the gas port to be sized correctly for a dedicated suppressed rifle. I am running a Silencerco Saker 762 can. I was able to do some early load development with hornady 108 ELD with both leverevolution and CFE223. No issues or pressure signs when following hornady reloading manual suggestions thus far. I am by no means saying it is flawless, I have much more testing to do prior to using this rifle in any serious competition.