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Originally Posted By 44Echo10: Is it really a design flaw or was the PRI forearm out before the mid-length gas location was a common thing and just lack of foresight by the designer/s? Have you fellows got a fix that works figured out? The forearm, recce rail, and barrel are all the higher dollar things I need for an H. I am now considering a Block II recce with a DD rail since this seems to be a common theme with the PRI system. I really wanted to do an H build in 6.8 SPC since the man had a big hand in both...and 6.8 was looked at early on in the SPR development. View Quote |
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-Things do not happen. Things are made to happen. -JFK
-Beware the fury of a patient man. -Thousands and thousands of laws....All for just ten commandments. -"alot" is not a word. |
Originally Posted By Engineer5:
It shouldn't stop you from building an "H". I'm just going to cut the end of the screw off of mine. View Quote View All Quotes View All Quotes Originally Posted By Engineer5:
Originally Posted By 44Echo10: Is it really a design flaw or was the PRI forearm out before the mid-length gas location was a common thing and just lack of foresight by the designer/s? Have you fellows got a fix that works figured out? The forearm, recce rail, and barrel are all the higher dollar things I need for an H. I am now considering a Block II recce with a DD rail since this seems to be a common theme with the PRI system. I really wanted to do an H build in 6.8 SPC since the man had a big hand in both...and 6.8 was looked at early on in the SPR development. |
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PSALMS 144-1
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I have a PRI Douglas barrel with PRI gasblock on mine, PRI built it on my upper/bcg and my screw appears to be touching as well, haven't confirmed yet though.
Problem I have this is a shooter, I've doped it to 900M and shot at 4 inch group at 1000yards once. It shoots where I aim it with 262 mod 1 which is all I fire in it. So do I mess with it at all? I don't see this as a design flaw at all, the handguard was originally used on the mk12 with rifle length gas system, so on that weapon it's not an issue. It's an oversight on the H with shorter gas system as that screw may cause issues. |
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Originally Posted By RMiller:
I have a PRI Douglas barrel with PRI gasblock on mine, PRI built it on my upper/bcg and my screw appears to be touching as well, haven't confirmed yet though. Problem I have this is a shooter, I've doped it to 900M and shot at 4 inch group at 1000yards once. It shoots where I aim it with 262 mod 1 which is all I fire in it. So do I mess with it at all? I don't see this as a design flaw at all, the handguard was originally used on the mk12 with rifle length gas system, so on that weapon it's not an issue. It's an oversight on the H with shorter gas system as that screw may cause issues. View Quote |
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PSALMS 144-1
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Originally Posted By prskiller:
If it shoots well don't mess with it. View Quote View All Quotes View All Quotes Originally Posted By prskiller:
Originally Posted By RMiller:
I have a PRI Douglas barrel with PRI gasblock on mine, PRI built it on my upper/bcg and my screw appears to be touching as well, haven't confirmed yet though. Problem I have this is a shooter, I've doped it to 900M and shot at 4 inch group at 1000yards once. It shoots where I aim it with 262 mod 1 which is all I fire in it. So do I mess with it at all? I don't see this as a design flaw at all, the handguard was originally used on the mk12 with rifle length gas system, so on that weapon it's not an issue. It's an oversight on the H with shorter gas system as that screw may cause issues. |
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Without blood, it doesn't count!
"A gun, like any other source of power, is a force for good or evil, being neither in itself, but dependent upon those who possess it." |
JMO but I think this contact may be acting as a whip screw, a la Mk14 EBR. Some barrels like no contact, others like "just touching", and some need solid contact. My Mk14 clone, with 18" barrel, likes contact plus a 1/4 turn for best groups to 300m.
The Sage chassis doesn't flex meaning that this contact is repeatable on a rigid system. JAE uses a similar set up but calls it a "barrel tensioner". If there is any movement in the stock/handguard then the contact isn't repeatable and this could be the cause of wandering/inconsistent groups. |
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If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
FWIW, issued Holland uppers there's no contact between that screw and the PRI block.
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Thanks guys. Good information.
Looks like with just cutting the plate in half everything will be good to go. Engel12626 posted a good pic in the Mk12 thread. I've never seen a PRI forearm in person so his pic gives me piece of mind it doesn't look like as much of an issue as my imagination was letting it be. |
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Originally Posted By ArmyPilot12:
But who here has used/shot a Bergara H barrel? I've looked at them but can't find any actual Bergara users, other than CVA black powder shooters. ETA For the same price, you're in WOA territory. View Quote |
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Originally Posted By jimmyboots:
PRI recommended a bergara barrel for a Hollandish upper I ordered last year. It has been accurate and flawless. View Quote View All Quotes View All Quotes Originally Posted By jimmyboots:
Originally Posted By ArmyPilot12:
But who here has used/shot a Bergara H barrel? I've looked at them but can't find any actual Bergara users, other than CVA black powder shooters. ETA For the same price, you're in WOA territory. |
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Got the mk4 back from leupold and swapped to NF rings. I went with A101s as they lined up almost perfectly with my clip on. 107s were a tad high. Too bad it'll likely be a couple of weeks before I get to shoot it again with the front screw no longer touching the gas block
Thinking about grabbing an a1 lower from brownells Attached File Attached File |
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Originally Posted By TheShlouf:
Got the mk4 back from leupold and swapped to NF rings. I went with A101s as they lined up almost perfectly with my clip on. 107s were a tad high. Too bad it'll likely be a couple of weeks before I get to shoot it again with the front screw no longer touching the gas block Thinking about grabbing an a1 lower from brownells https://www.AR15.Com/media/mediaFiles/223848/IMG_1809_JPG-967477.JPGhttps://www.AR15.Com/media/mediaFiles/223848/IMG_1811_JPG-967478.JPG View Quote |
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Originally Posted By lancecriminal86:
Would love to get feedback on rough groupings and what ammo it likes if you don't mind @jimmyboots View Quote View All Quotes View All Quotes Originally Posted By lancecriminal86:
Originally Posted By jimmyboots:
Originally Posted By ArmyPilot12:
But who here has used/shot a Bergara H barrel? I've looked at them but can't find any actual Bergara users, other than CVA black powder shooters. ETA For the same price, you're in WOA territory. |
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If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
Originally Posted By TheShlouf:
Got the mk4 back from leupold and swapped to NF rings. I went with A101s as they lined up almost perfectly with my clip on. 107s were a tad high. Too bad it'll likely be a couple of weeks before I get to shoot it again with the front screw no longer touching the gas block Thinking about grabbing an a1 lower from brownells https://www.AR15.Com/media/mediaFiles/223848/IMG_1809_JPG-967477.JPGhttps://www.AR15.Com/media/mediaFiles/223848/IMG_1811_JPG-967478.JPG View Quote Need to hunt you down a Gen Juan though :). I cut the under brace or whatever it's called in half today and re-installed front screw only, hopefully will get to the range later this week. Gas block definitely was marked up from the screw. |
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NRA Life Member USN Retired |
Update on screw/gb clearance.
Pulled my screw last night and I have no contact with the gas block, put a sheet of paper under it and reinstalled the screw, paper came out with ease so I have about 10-15 thousandths clearance. My screw measures .284. PRI did it right in fact on this one...back to shooting. |
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So I know I can go be poor somewhere else, but what are the best “value” options besides the BA Gov Profile with Ops cut or the Bison Armory 16” SPR barrel? And if not, generally which of those two barrels is the best option? They’re about the same price.
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Both the BA and Bison are solid barrels, depending on your preference for weight you could go with the Ballistic to shed some weight, or the Bison with more meat on it but closer to the correct Mod H profile.
The most correct but "budget" option is a Bergara from PRI. It's the right profile, right color (FDE coated) and a PRI gas block is the right block. It's a chunk more than the Bison/Ballistic at $285 but gets you closer in correctness south of the original Noveske barrels which nobody period has. Every time a supposed run of them has been mentioned the number floated was like $600 a pop, which IMO is pants-on-head retarded. |
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Originally Posted By lancecriminal86:
Both the BA and Bison are solid barrels, depending on your preference for weight you could go with the Ballistic to shed some weight, or the Bison with more meat on it but closer to the correct Mod H profile. The most correct but "budget" option is a Bergara from PRI. It's the right profile, right color (FDE coated) and a PRI gas block is the right block. It's a chunk more than the Bison/Ballistic at $285 but gets you closer in correctness south of the original Noveske barrels which nobody period has. Every time a supposed run of them has been mentioned the number floated was like $600 a pop, which IMO is pants-on-head retarded. View Quote |
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Originally Posted By lancecriminal86:
Both the BA and Bison are solid barrels, depending on your preference for weight you could go with the Ballistic to shed some weight, or the Bison with more meat on it but closer to the correct Mod H profile. The most correct but "budget" option is a Bergara from PRI. It's the right profile, right color (FDE coated) and a PRI gas block is the right block. It's a chunk more than the Bison/Ballistic at $285 but gets you closer in correctness south of the original Noveske barrels which nobody period has. Every time a supposed run of them has been mentioned the number floated was like $600 a pop, which IMO is pants-on-head retarded. View Quote |
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Without blood, it doesn't count!
"A gun, like any other source of power, is a force for good or evil, being neither in itself, but dependent upon those who possess it." |
This is the correct Bergara, yes?
https://www.precisionreflex.com/Detail.aspx?PROD=1295155 |
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NRA Life Member USN Retired |
Originally Posted By 78Staff:
This is the correct Bergara, yes? https://www.precisionreflex.com/Detail.aspx?PROD=1295155 View Quote originals were a noveske 1/7.7 twist, so closest is 1/8. i prefer 1/7 twist for these builds so that i can shoot some barnes 85 gr. and berger 82 gr. ammo out really far. retro arms works signed for my package today, hoping to have the uppers back early next week |
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321 pending days on the AEM5..... and counting. my mod H is retired till i get the can in.
I was presented an M1A in 6.5 creedmoor for graduation, and i dont really care about much else at this time . I found a local 100yd outdoor rifle range to join thats 10min away, so that's what I will have to use until i become a member at the 1000yd range 1.2hrs away. I'll stretch legs there when i can. its cheap and closer than my old 600yd range was. bison 1/7 here. no issues, shoots the same as my old WOA did. and its $200 |
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PRI Bergara 16" barrel just came in and can confirm that it is as depicted on their website. It is also dimpled for the gas block set screws and coated after dimpling. Still waiting on URX-4 to come in.
Bergara Mod H barrel |
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If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
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Originally Posted By ArmyPilot12:
PRI Bergara 16" barrel just came in and can confirm that it is as depicted on their website. It is also dimpled for the gas block set screws and coated after dimpling. Still waiting on URX-4 to come in. Bergara Mod H barrel View Quote |
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NRA Life Member USN Retired |
Originally Posted By 78Staff:
Looks good - I'm on the fence. I have the Bison Armory, and thought I was having accuracy issues, but after rebuilding the upper and re-mounting the scope as mentioned in the main MK12 thread, it's doing better. I just don't think the Bergara would do any better so haven't ordered it even though I've had it in my cart for about 2 weeks lol. View Quote View All Quotes View All Quotes Originally Posted By 78Staff:
Originally Posted By ArmyPilot12:
PRI Bergara 16" barrel just came in and can confirm that it is as depicted on their website. It is also dimpled for the gas block set screws and coated after dimpling. Still waiting on URX-4 to come in. Bergara Mod H barrel |
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Originally Posted By TheShlouf:
https://i1139.photobucket.com/albums/n558/theshloufq/FullSizeRender_zpsplftt385.jpg Finally got to shoot the H yesterday after getting rid of the screw over the gas block. Had some crazy 15 mph winds but still shot .8-1.2" over 60 rounds of 69 SMKs on 24.5 RL15. Pretty noticeable improvement. The AEM5 can't get approved soon enough. Question about the Ace socom stocks. What's the difference between the early Gens and Gen 4? I want to pick one up to try but gen 1-3 don't pop up very regularly. View Quote |
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Originally Posted By ProfessorHorseyhead: Adjustment button is different, and i think the really early ones didn't have the texture on the bottom of the stock. I could be wrong on that last part though. View Quote The newer ones use a standard end plate and castle nut. ETA Found a post that explains the differences. Second link is to pics. It takes a while for the pics to load. https://www.ar15.com/forums/ar-15/Official-Mk12-Mod0--Mod1--ModH-Photo-and-Discussion-Thread/118-520524/?page=806#i7415246 http://i32.photobucket.com/albums/d23/pcrunnels/IMG_2328_zpszewduzbh.jpg |
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If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
Originally Posted By TheShlouf:
https://i1139.photobucket.com/albums/n558/theshloufq/FullSizeRender_zpsplftt385.jpg Finally got to shoot the H yesterday after getting rid of the screw over the gas block. Had some crazy 15 mph winds but still shot .8-1.2" over 60 rounds of 69 SMKs on 24.5 RL15. Pretty noticeable improvement. View Quote |
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NRA Life Member USN Retired |
Originally Posted By ArmyPilot12:
There used to be a post in the big thread about the differences with pics, I don't know if it's still there and I'm not looking through 900+ pages. The newer ones use a standard end plate and castle nut. ETA Found a post that explains the differences. Second link is to pics. It takes a while for the pics to load. https://www.ar15.com/forums/ar-15/Official-Mk12-Mod0--Mod1--ModH-Photo-and-Discussion-Thread/118-520524/?page=806#i7415246 http://i32.photobucket.com/albums/d23/pcrunnels/IMG_2328_zpszewduzbh.jpg View Quote View All Quotes View All Quotes Originally Posted By ArmyPilot12:
There used to be a post in the big thread about the differences with pics, I don't know if it's still there and I'm not looking through 900+ pages. The newer ones use a standard end plate and castle nut. ETA Found a post that explains the differences. Second link is to pics. It takes a while for the pics to load. https://www.ar15.com/forums/ar-15/Official-Mk12-Mod0--Mod1--ModH-Photo-and-Discussion-Thread/118-520524/?page=806#i7415246 http://i32.photobucket.com/albums/d23/pcrunnels/IMG_2328_zpszewduzbh.jpg Originally Posted By 78Staff:
Nice, what barrel? My 12 and 18 hate 69's it seems in general, but I haven't handloaded any. |
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No offense man, but that is some ugly **** right there... Pri or Die baby! I know it's ITW good, but man.
Maybe it will look better with the AEM5 on it. |
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NRA Life Member USN Retired |
If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
I want one of those Ba deals For 200, including bbl, upper receiver, gas block and gas tube
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Gonna go by Wallyworld and see if I can find some paint that is a couple shades darker. If not I'll try dusting it with some flat OD.
I gots plenty of PRI suff on her now. Wanted to do the last iteration of the Mk12 while it's still in the system. URX4 is love, URX4 is life. |
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If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms.
Samuel Adams |
my aem5 paperwork was kicked back for euro optics signature. Mike got it resigned and sent back this week....he said rhat means we are close. prolly next two weeks! ill be just shy of a YEAR!!!!
my next pic in here will be of a completed Mk12 weapons system, at the range, shooting. |
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Strength Determination Merciless Forever
PA, USA
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Wasn't feeling the 1-6 on Holly. As you can clearly see, when it comes to the Hollands I really dgaf about correctness
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Originally Posted By HaveBlue83:
my aem5 paperwork was kicked back for euro optics signature. Mike got it resigned and sent back this week....he said rhat means we are close. prolly next two weeks! ill be just shy of a YEAR!!!! my next pic in here will be of a completed Mk12 weapons system, at the range, shooting. View Quote |
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APPROVED. stamp is at dealer! 347 days
ill blow this page up on saturday with pics ;) |
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Originally Posted By HaveBlue83:
APPROVED. stamp is at dealer! 347 days ill blow this page up on saturday with pics ;) View Quote Some groups out of the 16" Bergara from PRI that I shot for the first time this afternoon. ETA: Was messing around with the scope, hence the different POI in relation to the POA. Attached File Attached File Attached File |
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Just passing it along, saw two, new in box AEM5 cans while at Silent Industries in Madison Al
Attached File Attached File |
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Some Men fear war. Some wars fear Men-75th Ranger Regt.
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PSA - My Mod H w/Reece rail upper in the EE isn't getting much love, so dropped the price to $700 shipped.
https://www.ar15.com/forums/equipment-exchange/MK12-Mod-H-Holland-Uppper/159-1892413/ |
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NRA Life Member USN Retired |
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Originally Posted By HaveBlue83:
https://i.postimg.cc/zBspqWR1/IMG-20190713-142810.jpg https://i.postimg.cc/W3wt4cdb/IMG-20190713-141136.jpg https://i.postimg.cc/q7YWCNC1/IMG-20190713-141755.jpg View Quote I miss the beat to hell Fiocchi box tho... |
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Slow is smooth. Smooth is fast.
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