308reloaded Posted March 3, 2011 Report Posted March 3, 2011 I received my 308 upper receiver block today, I am not to happy with the fit. I originally thought I was buy a DPMS brand but they sent me a part marked 308 Brownells. I have side to side movement and if I take pin and put it in hole on the receiver they are allot smaller.. I could maybe re-drill fixture and use bigger pins.. I did not purchase this at brownell, it came from private dealerhow tight should the block fit into upper receiver.? how tight should the pins be?
imschur Posted March 3, 2011 Report Posted March 3, 2011 Mine came from Brownells. It fit pretty snug. On my DPMS receiver i had to use a nylon faced hammer to tap the pins in. Probably could have done it by hand but it would have hurt. On the SI it was also pretty snug but I was able to put the pins in by hand.
308reloaded Posted March 4, 2011 Author Report Posted March 4, 2011 if I turn mine on it's side the pin will fall out. I am going to have to redo and use larger pins. even if I have to make them both pins are .250pin size is .250measurement on receiver are :hole's on upper receiver tabs are. .279 pivot pin is .277 the reartake down pin is at .284 and and hole .294
308reloaded Posted March 4, 2011 Author Report Posted March 4, 2011 I'm going to try it, worst case is I ruin my upper receiver, . barrel should be hopfully by Saturday.
survivalshop Posted March 4, 2011 Report Posted March 4, 2011 Are you saying the pins on the block are loose in the the holes in the upper ? What brand upper are you using ? My holes in my DPMS upper are much smaller than your readings . I'm getting any where from 0.252" to 0.262" , depending on how much pressure I put on the digital caliper. If your pins in the block are 0.250" ,they are correct. A little side play in the block to upper should not matter as long as the pins are some what tight in the upper receiver holes. The block is made to fit a wide verity of uppers & may not be a tight fit to all . The block should just keep the upper receiver from twisting when tightening barrel nut . Some don't like the block because they say it puts too much stress on the uppers pin holes. I have not had a bad Brownells part or tool . Was this block new in the wrapper ?
308reloaded Posted March 4, 2011 Author Report Posted March 4, 2011 dpms brand upper , and as you can see thepivot pin and take down pin in the lower are bigger than .250 also so I do not believe the problem is my upper receiver.. rant removed
308reloaded Posted March 4, 2011 Author Report Posted March 4, 2011 Are you saying the pins on the block are loose in the the holes in the upper ? What brand upper are you using ?brand is dpms My holes in my DPMS upper are much smaller than your readings . I'm getting any where from 0.252" to 0.262" , depending on how much pressure I put on the digital caliper.The holes in upper match lower pins in size If your pins in the block are 0.250" ,they are correct. A little side play in the block to upper should not matter as long as the pins are some what tight in the upper receiver holes.pins are not tight. that would be covered in earlier post The block is made to fit a wide verity of uppers & may not be a tight fit to all . The block should just keep the upper receiver from twisting when tightening barrel nut .to bad no one makes something like model 1 for 308. that is a much better type IMHO Some don't like the block because they say it puts too much stress on the uppers pin holes.what choice is there, who make something different I have not had a bad Brownells part or tool . Was this block new in the wrapper ?this is from a 3rd party seller, but it is new.
6132expert Posted March 5, 2011 Report Posted March 5, 2011 So why cant you call the company and let them know the problem?I would let them know for sure I was not happy with the product or purchase. They may say keep it and send you another.
survivalshop Posted March 5, 2011 Report Posted March 5, 2011 I think my block is Made by DPMS . I will have to look at the box its in & I will send it to you if you need it .
308reloaded Posted March 5, 2011 Author Report Posted March 5, 2011 I am not sure about this block just yet, but do want to thank everyone for offering to help.
308reloaded Posted March 5, 2011 Author Report Posted March 5, 2011 So why cant you call the company and let them know the problem?I would let them know for sure I was not happy with the product or purchase. They may say keep it and send you another. I will not use this company again, this is tracking number # 9101128882300570596728 look at dates, told 3-4 days max before I would receive. I got my refund.I paid for a dpms claw and was sent block from brownells. are spec's diff.?bottom line is I don't like to wait when I paid not to. I build during cold months of the year, I shoot during the warm months of the year. wether it is just pl inking or shooting a 3 gun match. I figure I only have so much time to get something done on each project I start. I can still get this done in time. this is last build till I get my own machines. ( "don't quote me on that") at least that's the plan.
308reloaded Posted March 9, 2011 Author Report Posted March 9, 2011 can I get some measurement from someone else's upper receiver block. I will check and see if it is my upper out of spec, or the upper receiver block.
imschur Posted March 9, 2011 Report Posted March 9, 2011 Would you like to borrow mine and try them side by side?
ghitch75 Posted March 10, 2011 Report Posted March 10, 2011 i have a DPMS and just used it last night to put on PWS FSC-30 and mine fits in the receiver tight.....the pins do have a little play...but not enough to hurt the use of it....
6132expert Posted March 10, 2011 Report Posted March 10, 2011 I received my 308 upper receiver block today, I am not to happy with the fit. I originally thought I was buy a DPMS brand but they sent me a part marked 308 Brownells. I have side to side movement and if I take pin and put it in hole on the receiver they are allot smaller.. I could maybe re-drill fixture and use bigger pins.. I did not purchase this at brownell, it came from private dealerhow tight should the block fit into upper receiver.? how tight should the pins be?Is your Block white or black? I know you said you did not order from Brownells , but they have 2 one is black and one is the DPMS white. I am fixin to order one and I would hate to get in that bad batch.
308reloaded Posted March 10, 2011 Author Report Posted March 10, 2011 Would you like to borrow mine and try them side by side?I am thinking yes.
KellyTTE Posted March 10, 2011 Report Posted March 10, 2011 i have a DPMS and just used it last night to put on PWS FSC-30 and mine fits in the receiver tight.....the pins do have a little play...but not enough to hurt the use of it....You should NEVER use a receiver block to install/uninstall ANY muzzle device.The proper way is to use a BARREL VISE BLOCK. Otherwise you run the very real risk of tweaking your upper or barrel out of spec due to excessive torque at the barrel end./Defensive Edge ArmorerKelly
6132expert Posted March 10, 2011 Report Posted March 10, 2011 Those are for AR15 not 308, and I cant find one for a 308. One thing I have learned on here is if it dont state its for 308 its best not to use it.
Matt.Cross Posted March 10, 2011 Report Posted March 10, 2011 In this case, it would most likely carry over and work, unless you had a barrel profile that was just insanely large.
imschur Posted March 10, 2011 Report Posted March 10, 2011 The barrel vises are based on barrel OD and nothing else. 5.56 and 308 use the same profiles and diameters
survivalshop Posted March 10, 2011 Report Posted March 10, 2011 My bbl.vice blocks have two sizes on them.The above is right about installing & removing muzzle devices . I will take measurements of the receiver block for ya tonight when I get home . Unless some beats me to it & mine is white.
Jgun Posted March 11, 2011 Report Posted March 11, 2011 I like the PRI upper receiver block, it actually is cut so that one side is for the AR-15 and the other has the holes spaced for the AR .308 the only thing I did was make spacers so that the .250 pins provided aren't a loose fit in the . AR.308 uppers .270 ID pivot and takedown pin holes.
308reloaded Posted March 11, 2011 Author Report Posted March 11, 2011 Is your Block white or black? I know you said you did not order from Brownells , but they have 2 one is black and one is the DPMS white. I am fixin to order one and I would hate to get in that bad batch.black with 308 Brownell on bottom
KellyTTE Posted March 11, 2011 Report Posted March 11, 2011 The barrel vises are based on barrel OD and nothing else. 5.56 and 308 use the same profiles and diametersYou beat me to it. This is why I hate people. Well... Most people.. *thinks* Yeah.. Most..*sighs*Kelly
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