I know the usual barrel length on the LRP-07 factory builds is 20-22" and the max length handguard is 17.25". Has anyone used anything longer, like a 24" barrel? If so could you drop a pic and how was the balance of the rifle with the slightly longer barrel? I want to go a little longer one one of my barrels for this build so that my velocities may be a little more consistent with online load data since most are based off a 24-26" barrel.
JP LRI-20/LRP-07 with longer barrel
- Thread starter PRSDietitian
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I was just looking on JPs site the other day and noticed they now have heavy profile 24" 6cm and 6.5cm barrels available; that's something I have not seen them offer before. They typically used to offer light and medium profile barrels from 16" to 22" on the large frames, that's all that was available when I ordered my 2 LRP07's several years ago. Not sure if you can order the 24" heavy barrel on a rifle or upper assembly, but you can order it as a barrel kit.
One of my LRP07s has a 22" medium profile barrel and it balances out pretty well with a Magpul PRS stock, maybe a bit butt heavy. My old armalite AR10 had a heavy profile 24" barrel on it similar to that JP barrel I linked above, and it was a bit nose heavy IMO even with a heavy PRS buttstock, but it was easy to handle and shot well. If I was ordering my LRP07 today I think I'd go with the 24" heavy barrel.
I still want to swap out the barrels on my 2 6.5cm LRP07s as they have rifle length gas ports and are a bit hard on the brass no matter what buffer spring/weight and gas block setting, but rifle length gas was the only way JP made their 6cm and 6.5cm barrels at the time. Debating if I should just get 2x +2" gas port barrels and longer handguards for my current non semi monolithic uppers, or order 2x complete new semi monolithic uppers.
One of my LRP07s has a 22" medium profile barrel and it balances out pretty well with a Magpul PRS stock, maybe a bit butt heavy. My old armalite AR10 had a heavy profile 24" barrel on it similar to that JP barrel I linked above, and it was a bit nose heavy IMO even with a heavy PRS buttstock, but it was easy to handle and shot well. If I was ordering my LRP07 today I think I'd go with the 24" heavy barrel.
I still want to swap out the barrels on my 2 6.5cm LRP07s as they have rifle length gas ports and are a bit hard on the brass no matter what buffer spring/weight and gas block setting, but rifle length gas was the only way JP made their 6cm and 6.5cm barrels at the time. Debating if I should just get 2x +2" gas port barrels and longer handguards for my current non semi monolithic uppers, or order 2x complete new semi monolithic uppers.
I’m saying this, just because I love the semi monolithic upper, I would get the latter of the two. I have a shilen blank going to Paul Ross for a custom ultra heavy contour
I’m saying this, just because I love the semi monolithic upper, I would get the latter of the two. I have a shilen blank going to Paul Ross for a custom ultra heavy contour
I'm tempted, but the current cost of just a new complete semi monolithic upper is nearly what I paid for the complete rifles about 8 years ago, lol. They shoot great with the "old" uppers, not sure how much the semi monolithic uppers can improve things, but I do see them being stiffer and helping with heavy contour barrels.
yeah they support the barrel more and less flex between the receiver, barrel nut, barrel, and handguard
im getting a 22" 1.20 for the length of the barrel till you get to the gas block journal where it goes down to .936, the, down to .775 about 1.95" before the thread shoulder at the muzzle for a griffin PSR-7 suppressor brake
im getting a 22" 1.20 for the length of the barrel till you get to the gas block journal where it goes down to .936, the, down to .775 about 1.95" before the thread shoulder at the muzzle for a griffin PSR-7 suppressor brake
Their prices have gotten nuts. Cost more for a JP upper than a full Seekins sp10, which has a better rail interface and arguably just as good of a barrel. They want cut rifle prices for button rifle barrels. No thanks.
I decided to go with the JP receiver, and hand guard route only because Seekins no longer sells SP 10 builder kits. Sure I could get a used SP 10 and upgrade the barrel, but in the grand scheme of things I would actually be spending more money going that route compared to what I’m actually going to be doing.
I have a shilen blank on order Simply because the wait time on a 1.250 or a 1.20 street blank from Krieger or Bart Is a lot slower and I went to Bugholes and Bullet Central, and none of them had a 1.25 straight or 1.20 Straight in 6.5 that was able to be sent out right away
That being said, because the JP barrels do in Include the bolt, you’re probably looking at like $550 for the barrel. Although I don’t know who they get their blanks from.
I have a shilen blank on order Simply because the wait time on a 1.250 or a 1.20 street blank from Krieger or Bart Is a lot slower and I went to Bugholes and Bullet Central, and none of them had a 1.25 straight or 1.20 Straight in 6.5 that was able to be sent out right away
That being said, because the JP barrels do in Include the bolt, you’re probably looking at like $550 for the barrel. Although I don’t know who they get their blanks from.
Are you shooting PRS? Only reason I ask is do you need the larger diameter barrel for weight?
I had the same issue with a proof 6 arc barrel I just used to build a PRS gas gun. Ended up putting 2 sets of these on there and now it's perfectly balanced: https://l3idesignsolutions.com/product/m-lok-brass-weight-set/
I had the same issue with a proof 6 arc barrel I just used to build a PRS gas gun. Ended up putting 2 sets of these on there and now it's perfectly balanced: https://l3idesignsolutions.com/product/m-lok-brass-weight-set/
Yup mostly PRS not so much ruck matches. But I could use more weight for cardio workouts I guess
My buddy Phil Decker recommended those same weights
My buddy Phil Decker recommended those same weights
