Posts: 267
Threads: 18
Joined: Dec 2013
Has anyone used these?
http://www.undergroundtactical.com/produ...mbled.html
They sent us two of them to try out and from just a visual inspection they seem to be pretty high quality.
Posts: 241
Threads: 3
Joined: Sep 2014
No but I'm looking at them also, I'm in the market for one also. Interested!
Posts: 2,982
Threads: 194
Joined: Jun 2012
If I remember correctly their first run was out of spec. However, they quickly corrected the problem. I believe Satern has been using them as their primary supplier.
With the materials they advertise that they use, if they're specs are correct I wouldn't hesitate to use one.
"Those who sacrifice liberty for security, deserve neither." Benjamin Franklin
Posts: 47
Threads: 4
Joined: Sep 2014
I purchased a bolt from Satern late last year once they got them back in stock
If this was one of the those listed above, it works great and looks to be of a very high quality
cory Wrote:If I remember correctly their first run was out of spec. However, they quickly corrected the problem. I believe Satern has been using them as their primary supplier.
With the materials they advertise that they use, if they're specs are correct I wouldn't hesitate to use one.
Posts: 671
Threads: 75
Joined: Sep 2014
Watching with interest, I need a bolt for my latest build.
Posts: 267
Threads: 18
Joined: Dec 2013
Well I'm going to test this one out in the next few days so I'll let ya know
Posts: 267
Threads: 18
Joined: Dec 2013
The head space is the same as the MF/PF bolts
Posts: 95
Threads: 6
Joined: Dec 2012
02-02-2015, 04:53 PM
(This post was last modified: 02-02-2015, 04:54 PM by Errorhead.)
I bought one last summer, put it in a 14.5 pinned Sabre Defense upper, been running great. When I first got this gun up and running I took this bolt and carrier, and flip flopped it with the group in my AA overwatch, shot about 20 rounds in each with no problems. I just had to put a heavy buffer in the short gun but the Underground bolt runs fine in both my Grendels. I used go/no go gauges, looks the same as the AA to me.
Posts: 240
Threads: 64
Joined: Jan 2014
Id like to try em but All I'll ever bought werethe PF bolts...100% awesome
Posts: 345
Threads: 22
Joined: Mar 2012
I'm using one of their 7.62x39 bolts in my 7.62x39....500 rounds so far with no issues.
Posts: 8,507
Threads: 241
Joined: Sep 2014
I just noticed that they have a left hand Grendel bolt available or planned for release today.
http://www.undergroundtactical.com/produ...mbled.html
NRA Basic, Pistol, Rifle, Shotgun, RSO
CCW, CQM, DM, Long Range Rifle Instructor
6.5 Grendel Reloading Handbooks & chamber brushes can be found here:
www.AR15buildbox.com
Posts: 246
Threads: 17
Joined: Aug 2012
I got one right after they became available and have used it ever since with no drama. I also have a PF bolt as well. Both are well made and work in the 3 6.5Gs that I have.
Posts: 241
Threads: 3
Joined: Sep 2014
Sound like a good bolt then! Price is right also.
Posts: 3,214
Threads: 215
Joined: Jun 2011
LRRPF52 Wrote:I just noticed that they have a left hand Grendel bolt available or planned for release today.
http://www.undergroundtactical.com/produ...mbled.html
My nephew will be happy to hear this. Thanks for posting.