AR Sponsor
Posted: 8/24/2010 5:06:02 PM EDT
| Should I buy a D fender ring? I have extractor paranoia. |
|
The D-Fender was designed for this application. The NSWC Crane O-ring was a low-cost alternative, but the O-ring was never designed to be crushed. It will take a set and eventually fail. You could buy a large pack and just replace them every 5000 rounds or so. I went with the D-fender route and they've lasted several thousand rounds without a hiccup or scratch. |
|
Quoted:
The D-Fender was designed for this application. The NSWC Crane O-ring was a low-cost alternative, but the O-ring was never designed to be crushed. It will take a set and eventually fail. You could buy a large pack and just replace them every 5000 rounds or so. I went with the D-fender route and they've lasted several thousand rounds without a hiccup or scratch. I went the other way. Started with D-Fender but was put off by paying big dollars for a polymer "D" ring. The Crane O-rings are in fact a #60 Viton O-ring. Get them at McMaster-Carr part number 1201T16 (4.82 bag of 50) At that price you can afford to put a new one in anytime. Simple is better!! |
|
Quoted:
I took my o-ring and ran down to my local hardware store and bought every one he had in that size...I think they were around a nickel each.  Be sure they are Viton and not the standard Buna polymer compound commonly found in local hardware stores. Buna will not hold up to the heat and will fail. That is all......... |
|
I have D-Fenders in most of my rifles.
They won't break down from heat or any chemicals associated with guns and they are warrented for life. If one goes south, send it back, they send you a new one pronto. I have ten spares on hand at any time so if one goes bad I can replace it then and send the bad one back at my convenience, $100. big deal. Back when I was drinking, I could suck down $100 in an afternoon and still stand sort of upright. Problem is the darned things haven't gone bad in thousands of rounds of shooting, all of them still do the job. Only one I ever did replace was lost along with the extractor pin while cleaning a rifle out in the field. (I keep spare extractor pins also.) |
|
Quoted:
And to think I never had any trouble with the blue insert When everything works as it should, the insert and spring is all you need. It's when circumstances of FTE occur that the addition of the "D" or "O" ring can help. Some folks just opt for the extra extraction force for insurance. |
AR Sponsor