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Joined: Dec 2004
Posts: 20,379
Campfire Ranger
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OP
Campfire Ranger
Joined: Dec 2004
Posts: 20,379 |
Use the internal insert with the upper receiver block, or not necessary?
BTW, I have a temporary crown in that's giving me fits. Would someone please send me a block and insert for free?
I replace valve cover gaskets every 50K, if they don't need them sooner...
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Joined: Sep 2001
Posts: 19,152 Likes: 18
Campfire Ranger
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Campfire Ranger
Joined: Sep 2001
Posts: 19,152 Likes: 18 |
I recently did my first barrel change. Did some homework and ended up going with DPMS barrel vise blocks from Midway. I learned that is the method used by military armorers. Takes all the torque off the receiver.
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Joined: Sep 2001
Posts: 19,152 Likes: 18
Campfire Ranger
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Campfire Ranger
Joined: Sep 2001
Posts: 19,152 Likes: 18 |
With the receiver block, probably a good idea to use the insert, but apparently some folks put the bolt carrier in there to add rigidity.
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Joined: Dec 2004
Posts: 20,379
Campfire Ranger
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OP
Campfire Ranger
Joined: Dec 2004
Posts: 20,379 |
Checking it out right now.. Thanks, Shane.
I replace valve cover gaskets every 50K, if they don't need them sooner...
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Joined: Sep 2001
Posts: 19,152 Likes: 18
Campfire Ranger
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Campfire Ranger
Joined: Sep 2001
Posts: 19,152 Likes: 18 |
The upper receiver blocks probably work better if you are installing a free-float tube, since that would leave the barrel area unobstructed.
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Joined: Jan 2005
Posts: 57,494
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 57,494 |
Yep, if you have a float tube...
But if not, a block of wood, bored correctly, and split with some rosin... cheap as you will get.
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Dec 2010
Posts: 574
Campfire Regular
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Campfire Regular
Joined: Dec 2010
Posts: 574 |
Use the internal insert with the upper receiver block, or not necessary?
My receiver block set includes a metal guide rod for setting gas tube clearance when torqueing the barrel nut, so I always use the insert.
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Joined: Jan 2006
Posts: 8,590
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2006
Posts: 8,590 |
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Joined: Sep 2009
Posts: 13,860
Campfire Outfitter
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Campfire Outfitter
Joined: Sep 2009
Posts: 13,860 |
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Joined: Jan 2006
Posts: 8,590
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2006
Posts: 8,590 |
Brownell's makes something similar. Unfortunately I can't get to their website while I'm at work or I'd dig it up...
-Dan
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Joined: Feb 2007
Posts: 606
Campfire Regular
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Campfire Regular
Joined: Feb 2007
Posts: 606 |
$60 cheaper. The Brownell's one actually lets you put your torque wrench on the back of it and you clamp the barrel nut wrench into your vise. Now that is slick!
You need to call it. I can't call it for you.
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Joined: Jan 2006
Posts: 8,590
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2006
Posts: 8,590 |
I just ordered one of the Brownell's units. I'll let you guys know what I think after I'm done.
Should be spinning a barrel on next week sometime.
-Dan
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Joined: Dec 2002
Posts: 1,981
Campfire Regular
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Campfire Regular
Joined: Dec 2002
Posts: 1,981 |
Torquing is nice but you still have to line up the gas tube holes?????
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Joined: May 2009
Posts: 4,610 Likes: 1
Campfire Tracker
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Campfire Tracker
Joined: May 2009
Posts: 4,610 Likes: 1 |
The gas tube will generally line up with one hole between the min and max recommended torque limits.
30-80 FP IIRC?
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Joined: Jan 2005
Posts: 57,494
Campfire Kahuna
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Campfire Kahuna
Joined: Jan 2005
Posts: 57,494 |
Torquing is nice but you still have to line up the gas tube holes????? I forget what torque is. 80 ft lbs sounds a bit high but I may be wrong. Re lining up, I torqued em, spun em loose and torqued again and wherever it was it was. I have a dremel and can cut the tits out, and generally do anyway to make sure I have plenty of clearance and nothing will bind on the gas tube. Never hurt any of my guns as of this time.
We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....
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Joined: Nov 2006
Posts: 10,197 Likes: 1
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2006
Posts: 10,197 Likes: 1 |
30-80 ft lbs is spec but I try to stay between 40-50. I have ground a tit off but the new hand guards usually line up on them so I trim the inside of the barrel nut to stay in the 40-50 ft lb range now.
Randall at Ar15barrels use to sell shims, I've used them before too.
Then there are some that don't torque at all...
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Joined: Dec 2002
Posts: 1,981
Campfire Regular
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Campfire Regular
Joined: Dec 2002
Posts: 1,981 |
30-80 ft lbs is spec but I try to stay between 40-50. I have ground a tit off but the new hand guards usually line up on them so I trim the inside of the barrel nut to stay in the 40-50 ft lb range now.
Randall at Ar15barrels use to sell shims, I've used them before too.
Then there are some that don't torque at all... Torquing is good.......just saying that you can't get a specific torque and have all the tubes line up...unless you dremel....I generally use the German Torque spec..
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Joined: Nov 2006
Posts: 10,197 Likes: 1
Campfire Outfitter
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Campfire Outfitter
Joined: Nov 2006
Posts: 10,197 Likes: 1 |
Lining up the gas tube hole and staying within a specific torque range, is where trimming the barrel nut or shimming come into play.
I've seen some that would not torque at 80 lbs and line up. Shims is handy...
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Joined: Jan 2006
Posts: 8,590
Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2006
Posts: 8,590 |
Just wanted to update regarding the Brownell's tool.
I picked one up and it's a very nice, well machined piece. It fits with very little wiggle room inside the upper receiver. Installed a barrel using it and have no complaints. The one suggestion I would make (if they were asking me) is to install some flats on the rear portion of the tool (that sticks out of the receiver) so it could be locked in a vase. As is, it's a 2-handed operation.
If anybody ever wants to borrow mine, just let me know and cover the shipping...
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