AR Sponsor
Posted: 1/6/2008 8:19:09 AM EDT
| Does anyone know if the DPMS receiver claw puts too much stress on the front and rear pin holes when applying the force needed to remove/install a barrel? I'm trying to decide which type to buy, a Bushmaster type or the claw. It seems that the DPMS would be versatile for any type of recevier, A2, flat top, etc, but I'm concerned about altering the pin holes with stress. Thanks |
|
The pin holes aren't the only thing taking the force. The upper portion of the claw fits snuggly inside the upper receiver. I'm not sure how much force it would take to actually move or brake that upper portion, but it would be way more than you should have to use when tightening the barrel nut. I have used it a few times and I'm very pleased with it. I also have a small vise that may or may not have fit the bushmaster action block. |
If you're concerned about it, just put it in the vise sideways with a block of wood to protect the top rail. |
You may be required to torque to as much as 80 to get the gas tube holes to line up. IMO, it would be better to get the Bushmaster, but thats just me. The receiver acts as a lever since the attachment point of the claw.is smaller than the part you are torquing down, so that 80ft lbs of torque is translated into more like 100ft lbs being placed on the two lugs of the upper. Thats alot of force. |
|
Its what DPMS uses at the factory on all their uppers. I have one and would not use anything else. Its also on sale right now at the DPMS website Looks like the sale is over. They were 28 bucks www.dpmsinc.com/store/products/?prod=1675&cat=1814 |
We missed it by one day. |
Of course, you could always resort to installing your barrels the way the armed forces service manuals tell you to---by clamping the barrel and not the reciever. That way you eouldn't have to worry about breaking lugs, or more commonly, the completed job shooting way to the right; because the barrel locating pin dug into left side of the slot during the (incorrect) method of mounting the barrel. But hey, what do I know? Only been working on ARs and M16s since 1976 If y'all want to spend $15-$20 more on a piece of injection molded plastic, than on a pair of aluminum vise jaws, why should I try to stop you? 
|
When installing a FF hand guard you need to sneak up on TDC and test fit the rail to make sure it is lined up with the receiver rail. That would be a big PITA doing it with barrel blocks. Based on the torque I've applied to the lugs, I wouldn't worry. 
|
AR Sponsor